SINUMERIK 840D sl. Service - Functions. Manual (2018-2020)

S7: Memory configuration

16.4 Configuration of the static user memory

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Static NC memory for SINUMERIK 840D sl

Static-user-memory size

The size of the static user memory is displayed in machine data:

MD18230 $MN_MM_USER_MEM_BUFFERED

Extended Functions

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S7: Memory configuration

16.4 Configuration of the static user memory

Parts of the static user memory

Passive file system

The following partitions of the passive file system are present in the static user memory:

Partition

Storage of:

U (User)

● Files from the _N_CUS_DIR directory (user cycles)

● Part programs

● Workpieces

M (Manufacturer = Machine manufacturer)

Files from the _N_CMA_DIR directory (Machine-manufac-

turer cycles)

The free memory of the passive file system displayed in MD18060

$MN_INFO_FREE_MEM_STATIC can be divided among the partitions U and M. The setting

is made via the machine data:

● MD18352 $MN_MM_U_FILE_MEM_SIZE = <memory size for user data>

● MD18353 $MN_MM_M_FILE_MEM_SIZE = <memory size for machine manufacturer data>

Note

Partition S

Partition S (Siemens = Control manufacturer) of the passive file systems is in the dynamic

memory (Page 833).

Active file system

The memory of the active file system is divided into different areas (tool management, global

user data, ...). The size can be set for each area in the machine data that configures memory

(...MM_...).

Free capacity

The size of the free memory is displayed in the machine data:

MD18060 $MN_INFO_FREE_MEM_STATIC

Note

The memory required to expand the memory areas is displayed in the "Startup" area of the

user interface. This information enables the system startup engineer to estimate the actual

memory requirements for the planned expansion.

Memory expansion (option)

If additional static user memory is required, a memory expansion can be purchased as an

option.

You can use the additional memory as required to expand partitions U and/or M or to expand

the memory area of the active file system.

Extended Functions

832

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S7: Memory configuration

16.5 Configuration of the dynamic user memory

16.4.2

Commissioning

You can adjust the default memory division by increasing/decreasing individual memory areas

for each user.

Basic procedure:

1. Load standard machine data.

References:

Commissioning the CNC: NC, PLC, Drive; section "Requirements for commissioning" >

"Power-on and startup"

2. Determining the maximum possible size of the static user memory (including the optional

memory expansion):

MD18230 $MN_MM_USER_MEM_BUFFERED

3. Optional: modifying the size of the static user memory:

- MD19250 $ON_USER_MEM_BUFFERED

- Perform a power-on reset.

4. Optional: setting the size partitions U and M:

- MD18352 $MN_MM_U_FILE_MEM_SIZE

- MD18353 $MN_MM_M_FILE_MEM_SIZE

5. Optional: setting up additional channels of the control:

MD10010 $MC_ASSIGN_CHAN_TO_MODE_GROUP

6. Optional: setting the size of the memory areas of the active file system (tool management,

global user data, ...):

- Determining the free static user memory:

MD18060 $MN_INFO_FREE_MEM_STATIC

- Setting the size of the memory areas of the active file system in the machine data that

configure memory (...MM_...).

7. Perform a power-on reset.

The memory will be reconfigured the next time the control starts up.

References:

For a detailed description of machine data, refer to:

● List Manual Machine Data and Parameters

16.5

Configuration of the dynamic user memory

16.5.1

Division of the dynamic NC memory

The dynamic NC memory is used jointly by the system and by the user. The area available to

the user is defined as the dynamic user memory.

Extended Functions

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833

S7: Memory configuration

16.5 Configuration of the dynamic user memory

The figure below shows the principle division of the dynamic NC memory:

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Figure 16-2

Dynamic NC memory

Dynamic-user-memory size

The size of the dynamic user memory is displayed in machine data:

MD18210 $MN_MM_USER_MEM_DYNAMIC

Free user memory

The user memory still available is shown in the machine data:

MD18050 $MN_INFO_FREE_MEM_DYNAMIC

Extended Functions

834

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S7: Memory configuration

16.5 Configuration of the dynamic user memory

The value of the machine data indicates how much memory is available to expand the user

data areas (local user data, IPO buffer, etc.) for each channel.

Parts of the dynamic user memory

Passive file system

Partition S of the passive file system is in the dynamic user memory:

Partition

Storage of:

S (Siemens = Control manufacturer)

Files from the _N_CST_DIR directory (Siemens cycles)

The size of partition S is preset and cannot be modified.

Memory expansion

If an NCU is used with at least 2 GB of working memory, it is possible to use part of the working

memory to expand the dynamic user memory.

The expansion of the additional dynamic user memory is defined in 4 MB steps in machine

data:

OD19240 $ON_USER_MEM_DYNAMIC

Total size of the dynamic user memory

"Total size of the dynamic user memory" = basic expansion + OD19240

$ON_USER_MEM_DYNAMIC * 4MB

Display

The dynamic user memory currently available is shown in machine data:

MD18210 $MN_MM_USER_MEM_DYNAMIC

16.5.2

Commissioning

You can adjust the default memory division by increasing/decreasing individual memory areas

for each user.

Basic procedure:

1. Determining the size of the free dynamic user memory:

MD18050 $MN_INFO_FREE_MEM_DYNAMIC

2. Optional: enlarging the dynamic user memory:

- MD18210 $MN_MM_USER_MEM_DYNAMIC

- Perform a power-on reset.

3. Optional: Setting the size of the memory areas of the dynamic user memory in the machine

data that configure memory (...MM_...):

4. Perform a power-on reset.

The memory will be reconfigured the next time the control starts up.

Extended Functions

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S7: Memory configuration

16.6 Boundary conditions

References:

For a detailed description of machine data, refer to:

● List Manual Machine Data and Parameters

16.6

Boundary conditions

16.6.1

Depending on the number of channels and tool carriers

If the number of channels is increased, then it may also be necessary to increase the number

of tool carriers.

The number of tool carriers available in the control has to be set according to the following rule:

MD18088 $MN_NUM_TOOL_CARRIER =

<Highest number of tool carriers in one channel> *

The tool carriers are distributed in the control equally among the available channels.

Example

3 channels are parameterized in the NC. The number of tool carriers required in the channels

is:

1. Channel: 3 ⇒ maximum value

2. Channel: 2

3. Channel: 1

MD18088 = <Highest number of tool carriers in one channel> * <Number of

channels> = 3 * 3 = 9

3 tool carriers are thus assigned to each channel

16.6.2

Subsequent reduction of the number of channels and/or axes

Once an increase in the number of channels and/or axes has been made effective in the control

by a warm restart, it cannot then be reversed if a setup archive is to be created for this control.

If such a setup archive is loaded into a control, the process is interrupted by an alarm.

Differences between the dynamic and static memory of the NC

● Dynamic memory: The internal memory requirement increases if the numbers of channels

and axes are increased.

● Static memory: The internal memory requirement increases only if the number of

channels is increased.

Extended Functions

836

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S7: Memory configuration

16.7 Data lists

16.7

Data lists

16.7.1

Machine data

16.7.1.1

General machine data

Number

Identifier: $MN_

Description

10134

MM_NUM_MMC_UNITS

Number of simultaneous HMI communication partners

10850

MM_EXTERN_MAXNUM_OEM_GCODES

Maximum number of OEM-G commands

10880

MM_EXTERN_CNC_SYSTEM

Definition of the control system to be adapted

10881

MM_EXTERN_GCODE_SYSTEM

ISO_3 Mode: GCodeSystem

18050

INFO_FREE_MEM_DYNAMIC

Free-dynamic-memory display data

18060

INFO_FREE_MEM_STATIC

Free-static-memory display data

18070

INFO_FREE_MEM_DPR

Display data for free memory in

dual-port RAM

18072

INFO_FREE_MEM_CC_MD

Displays memory available in the CC-MD memory

18078

MM_MAX_NUM_OF_HIERARCHIES

Maximum number of definable magazine-location-type

hierarchies

18079

MM_MAX_HIERARCHY_ENTRIES

Maximum permissible number of entries in a magazine-

location-type hierarchy

18080

MM_TOOL_MANAGEMENT_MASK

Mask for reserving memory for tool management

18082

MM_NUM_TOOL

Number of tools managed by NC

18084

MM_NUM_MAGAZINE

Number of magazines managed by NC

18086

MM_NUM_MAGAZINE_LOCATION

Number of magazine locations

18088

MM_NUM_TOOL_CARRIER

Maximum number of definable toolholders

18090

MM_NUM_CC_MAGAZINE_PARAM

Compile-cycle tool management:

quantity of magazine data

18092

MM_NUM_CC_MAGLOC_PARAM

Compile-cycle tool management:

quantity of magazine-location data

18094

MM_NUM_CC_TDA_PARAM

Compile-cycle tool management: quantity of TDA data

18096

MM_NUM_CC_TOA_PARAM

Compile-cycle tool management: quantity of TOA data

18098

MM_NUM_CC_MON_PARAM

Compile-cycle tool management:

quantity of monitor data

18100

MM_NUM_CUTTING_EDGES_IN_TOA

Number of tool offsets in NC

18102

MM_TYPE_OF_CUTTING_EDGE

Type of D-number programming

18104

MM_NUM_TOOL_ADAPTER

Tool adapter in TO area

18105

MM_MAX_CUTTING_EDGE_NO

Maximum value of D number

18106

MM_MAX_CUTTING_EDGE_PERTOOL

Maximum number of D numbers per tool

18108

MM_NUM_SUMCORR

Additive offsets in the TO area

18110

MM_MAX_SUMCORR_PER_CUTTEDGE

Maximum number of sum offsets per cutting edge

18112

MM_KIND_OF_SUMCORR

Properties of additive offsets in the TO area

18114

MM_ENABLE_TOOL_ORIENT

Assign orientation to cutting edges

Extended Functions

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S7: Memory configuration

16.7 Data lists

Number

Identifier: $MN_

Description

18116

MM_NUM_TOOL_ENV

Number of tool environments in TO area

18118

MM_NUM_GUD_MODULES

Number of GUD modules

18120

MM_NUM_GUD_NAMES_NCK

Number of global user variables

18130

MM_NUM_GUD_NAMES_CHAN

Number of channel-specific user variables

18140

MM_NUM_GUD_NAMES_AXIS

Number of axis-specific user variables

18150

MM_GUD_VALUES_MEM

Memory space for global user variables

18160

MM_NUM_USER_MACROS

Number of macros

18170

MM_NUM_MAX_FUNC_NAMES

Number of miscellaneous functions

18180

MM_NUM_MAX_FUNC_PARAM

Number of additional parameters

18190

MM_NUM_PROTECT_AREA_NCK

Number of protection zones in NC

18200

MM_NUM_CCS_MAGAZINE_PARAM

Number of Siemens OEM magazine data

18201

MM_TYPE_CCS_MAGAZINE_PARAM

Siemens OEM magazine data type

18202

MM_NUM_CCS_MAGLOC_PARAM

Number of Siemens OEM magazine location data

18203

MM_TYPE_CCS_MAGLOC_PARAM

Siemens OEM magazine location data type

18204

MM_NUM_CCS_TDA_PARAM

Number of Siemens OEM tool data

18205

MM_TYPE_CCS_TDA_PARAM

Siemens OEM tool data type

18206

MM_NUM_CCS_TOA_PARAM

Number of Siemens OEM data per cutting edge

18207

MM_TYPE_CCS_TOA_PARAM

Siemens OEM data type per cutting edge

18208

MM_NUM_CCS_MON_PARAM

Number of Siemens OEM monitor data

18209

MM_TYPE_CCS_MON_PARAM

Siemens OEM monitor data type

18210

MM_USER_MEM_DYNAMIC

User memory for non-persistent data

18220

MM_USER_MEM_DPR

User memory in dual-port RAM

18230

MM_USER_MEM_BUFFERED

User memory for persistent data

18231

MM_USER_MEM_BUFFERED_TYPEOF

Data-buffer technology

18232

MM_ACTFILESYS_LOG_FILE_MEM

System: Log-file size

18238

MM_CC_MD_MEM_SIZE

Memory size for compile cycle machine data

18240

MM_LUD_HASH_TABLE_SIZE

Hash-table size for user variables

18242

MM_MAX_SIZE_OF_LUD_VALUE

Maximum LUD-variable array size

18250

MM_CHAN_HASH_TABLE_SIZE

Hash-table size for channel-specific data

18260

MM_NCK_HASH_TABLE_SIZE

Hash-table size for global data

18270

MM_NUM_SUBDIR_PER_DIR

Number of subdirectories

18280

MM_NUM_FILES_PER_DIR

Number of files per directory

18290

MM_FILE_HASH_TABLE_SIZE

Hash-table size for files in a directory

18300

MM_DIR_HASH_TABLE_SIZE

Hash-table size for subdirectories

18310

MM_NUM_DIR_IN_FILESYSTEM

Number of directories in passive file system

18320

MM_NUM_FILES_IN_FILESYSTEM

Number of files in passive file system

18332

MM_FLASH_FILE_SYSTEM_SIZE

Size of flash file system on PCNC

18342

MM_CEC_MAX_POINTS

Maximum table size for sag compensation

18350

MM_USER_FILE_MEM_MINIMUM

Minimum part-program memory

18352

MM_U_FILE_MEM_SIZE

End-user memory for part programs/cycles/files

Extended Functions

838

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S7: Memory configuration

16.7 Data lists

Number

Identifier: $MN_

Description

18353

MM_M_FILE_MEM_SIZE

Memory size for cycles/files of the machine manufac-

turer

18354

MM_S_FILE_MEM_SIZE

Memory size for cycles/files of the NC manufacturer

18355

MM_T_FILE_MEM_SIZE

Memory size for temporary files

18356

MM_E_FILE_MEM_SIZE

Memory size for external files

18360

MM_EXT_PROG_BUFFER_SIZE

FIFO buffer size for execution from an external source

18362

MM_EXT_PROG_NUM

Number of program levels that can be processed si-

multaneously from external

18370

MM_PROTOC_NUM_FILES

Maximum number of log files

18371

MM_PROTOC_NUM_ETPD_STD_LIST

Number of standard ETPD data lists

18372

MM_PROTOC_NUM_ETPD_OEM_LIST

Number of ETPD OEM data lists

18373

MM_PROTOC_NUM_SERVO_DATA

Number of servo data for log

18374

MM_PROTOC_FILE_BUFFER_SIZE

Log-file buffer size

18375

MM_PROTOC_SESS_ENAB_USER

User-enabled for sessions

18390

MM_COM_COMPRESS_METHOD

Supported compression method

18400

MM_NUM_CURVE_TABS

Number of curve tables (persistent)

18402

MM_NUM_CURVE_SEGMENTS

Number of curve segments (persistent)

18403

MM_NUM_CURVE_SEG_LIN

Number of linear curve segments (persistent)

18404

MM_NUM_CURVE_POLYNOMS

Number of curve table polynomials (persistent)

18406

MM_NUM_CURVE_TABS_DRAM

Number of curve tables (non-persistent)

18408

MM_NUM_CURVE_SEGMENTS_DRAM

Number of curve segments (non-persistent)

18409

MM_NUM_CURVE_SEG_LIN_DRAM

Number of linear curve segments (non-persistent)

18410

MM_NUM_CURVE_POLYNOMS_DRAM

Number of curve table polynomials (non-persistent)

18450

MM_NUM_CP_MODULES

Maximum number of CP modules

18452

MM_NUM_CP_MODUL_LEAD

Maximum number of leading values per CP coupling

module

18500

MM_EXTCOM_TASK_STACK_SIZE

Stack size of external communication task (non-persis-

tent)

18502

MM_COM_TASK_STACK_SIZE

Stack size in Kbytes of communication task (non-per-

sistent)

18510

MM_SERVO_TASK_STACK_SIZE

Stack size of servo task (non-persistent)

18512

MM_IPO_TASK_STACK_SIZE

Stack size of IPO task (non-persistent)

18520

MM_DRIVE_TASK_STACK_SIZE

Stack size of drive task (non-persistent)

18540

MM_PLC_TASK_STACK_SIZE

Stack size of the PLC task (non-persistent)

18600

MM_FRAME_FINE_TRANS

Fine offset for FRAME (persistent)

18601

MM_NUM_GLOBAL_USER_FRAMES

Number of globally predefined user frames (persistent)

18602

MM_NUM_GLOBAL_BASE_FRAMES

Number of global basic frames (persistent)

18660

MM_NUM_SYNACT_GUD_REAL

Number of configurable real-type GUD variables

18661

MM_NUM_SYNACT_GUD_INT

Number of configurable integer-type GUD variables

18662

MM_NUM_SYNACT_GUD_BOOL

Number of configurable Boolean-type GUD variables

18663

MM_NUM_SYNACT_GUD_AXIS

Number of configurable axis-type GUD variables

18664

MM_NUM_SYNACT_GUD_CHAR

Configurable char-type GUD variable

Extended Functions

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S7: Memory configuration

16.7 Data lists

Number

Identifier: $MN_

Description

18665

MM_NUM_SYNACT_GUD_STRING

Configurable STRING-type GUD variable

18700

MM_SIZEOF_LINKVAR_DATA

Size of the NCU link variable memory

18710

MM_NUM_AN_TIMER

Number of global time variables for synchronized ac-

tions

18720

MM_SERVO_FIFO_SIZE

Setpoint for buffer size between IPO and closed-loop

position control

18780

MM_NCU_LINK_MASK

Activation of NCU link communication

18781

NCU_LINK_CONNECTIONS

Number of internal link connections

18782

MM_LINK_NUM_OF_MODULES

Number of NCU link modules

18790

MM_MAX_TRACE_LINK_POINTS

Size of trace data buffer for NCU link

18792

MM_TRACE_LINK_DATA_FUNCTION

Specifies the contents of NCU link files

18794

MM_TRACE_VDI_SIGNAL

Trace specification of VDI signals

18800

MM_EXTERN_LANGUAGE

Activation of external NC languages

18860

MM_MAINTENANCE_MON

Activate recording of maintenance data

18870

MM_MAXNUM_KIN_CHAINS

Maximum number of trains

18880

MM_MAXNUM_KIN_CHAIN_ELEM

Maximum number of train elements

18890

MM_MAXNUM_3D_PROT_AREAS

Maximum number of elements in 3D protection zones

18892

MM_MAXNUM_3D_PROT_AREA_ELEM

Maximum number of protection-zone elements

18894

MM_MAXNUM_3D_PROT_GROUPS

Maximum number of protection-zone groups

18896

MM_MAXNUM_3D_COLLISION

Maximum number of temporary memory locations for

collision check

16.7.1.2

Channelspecific machine data

Number

Identifier: $MC_

Description

20096

T_M_ADDRESS_EXIT_SPINO

Spindle number as address extension

27900

REORG_LOG_LIMIT

Percentage of IPO buffer for log-file enable

28000

MM_REORG_LOG_FILE_MEM

Memory size for REORG

28010

MM_NUM_REORG_LUD_MODULES

Number of modules for local user variables with RE-

ORG

28020

MM_NUM_LUD_NAMES_TOTAL

Number of local user variables

28040

MM_LUD_VALUES_MEM

Memory size for local user variables

28050

MM_NUM_R_PARAM

Number of channel-specific R parameters

28060

MM_IPO_BUFFER_SIZE

Number of NC blocks in the IPO buffer

28070

MM_NUM_BLOCKS_IN_PREP

Number of blocks for block preparation

28080

MM_NUM_USER_FRAMES

Number of settable frames

28081

MM_NUM_BASE_FRAMES

Number of basic frames (persistent)

28082

MM_SYSTEM_FRAME_MASK

System frames (persistent)

28083

MM_SYSTEM_DATAFRAME_MASK

System frames (persistent)

28085

MM_LINK_TOA_UNIT

Allocation of a TO unit to a channel

28090

MM_NUM_CC_BLOCK_ELEMENTS

Number of block elements for compile cycles

Extended Functions

840

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S7: Memory configuration

16.7 Data lists

Number

Identifier: $MC_

Description

28100

MM_NUM_CC_BLOCK_USER_MEM

Size of block memory for compile cycles

28105

MM_NUM_CC_HEAP_MEM

Heap memory in KB for compile cycle applications (non-

persistent)

28150

MM_NUM_VDIVAR_ELEMENTS

Number of elements for writing PLC variables

28160

MM_NUM_LINKVAR_ELEMENTS

Number of write elements for the NCU link variables

28180

MM_MAX_TRACE_DATAPOINTS

Size of trace data buffer

28200

MM_NUM_PROTECT_AREA_CHAN

Number of modules for channel-specific protection

zones

28210

MM_NUM_PROTECT_AREA_ACTIVE

Number of simultaneously active protection zones

28212

MM_NUM_PROTECT_AREA_CONTOUR

Elements for active protection zones (non-persistent)

28250

MM_NUM_SYNC_ELEMENTS

Number of elements for expressions in synchronized

actions

28252

MM_NUM_FCTDEF_ELEMENTS

Number of FCTDEF elements

28254

MM_NUM_AC_PARAM

Dimension of $AC_PARAM.

28255

MM_BUFFERED_AC_PARAM

$AC_PARAM[...] (persistent)

28256

MM_NUM_AC_MARKER

Dimension of $AC_MARKER

28257

MM_BUFFERED_AC_MARKER

$AC_MARKER[...] (persistent)

28258

MM_NUM_AC_TIMER

Number of $AC_TIMER time variables (non-persistent)

28274

MM_NUM_AC_SYSTEM_PARAM

Number of $AC_SYSTEM_ PARAM for motion-syn-

chronous actions

28276

MM_NUM_AC_SYSTEM_MARKER

Number of $AC_SYSTEM_ MARKER for motion-syn-

chronous actions

28290

MM_SHAPED_TOOLS_ENABLE

Enable tool-radius compensation for contour tools

28300

MM_PROTOC_USER_ACTIVE

Activate logging for a user

28301

MM_PROTOC_NUM_ETP_OEM_TYP

Number of ETP OEM event types

28302

MM_PROTOC_NUM_ETP_STD_TYP

Number of ETP standard event types

28400

MM_ABSBLOCK

Activate block display with absolute values

28402

MM_ABSBLOCK_BUFFER_CONF

Dimension size of upload buffer

28450

MM_TOOL_DATA_CHG_BUFF_SIZE

Buffer for tool data changes (non-persistent)

28500

MM_PREP_TASK_STACK_SIZE

Stack size of preparatory task

28520

MM_MAX_AXISPOLY_PER_BLOCK

Maximum number of axis polynomials per block

28530

MM_PATH_VELO_SEGMENTS

Number of memory chips for limiting the tool-path ve-

locity

28535

MM_FEED_PROFILE_SEGMENTS

Number of memory chips for feed profiles

28540

MM_ARCLENGTH_SEGMENTS

Number of memory chips for displaying the arc length

function

28560

MM_SEARCH_RUN_RESTORE_MODE

Restore data after a simulation

28580

MM_ORIPATH_CONFIG

Setting for ORIPATH tool orientation trajectory referred

to path

Extended Functions

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841

T1: Indexing axes

17.1

Brief Description

When machine axes only traverse between a certain number of fixed positions, these positions

can be parameterized as indexing positions. In NC programs, these machine axes, then known

as indexing axes, can be traversed with reference to indexing positions using special

commands.

Typical applications for indexing axes include tool magazines, for example (tool revolver, tool

chain magazines or tool cartridge magazines). The magazine locations of the tools are

parameterized as indexing positions.

It is possible to traverse an indexing axis in the following operating modes:

● AUTOMATIC

● MDI

● JOG

● JOG / INC1, INC10, ... INCvar

17.2

Detailed description

17.2.1

Traversing of indexing axes in the AUTOMATIC mode

Traversal to selected positions

Using the general traversing commands ( G90, G91, AC, IC, ...) an indexing axis can be

traversed to any position within the traversing range of the machine axis.

Traversing to indexing positions

Using the specific traversing commands for indexing axes, it is ensured that only the

parameterized indexing positions are approached. See Chapter "Programming (Page 852)".

17.2.2

Traversing of indexing axes in the JOG mode

In the JOG mode, the indexing positions are only taken into account after referencing/

synchronizing the active measuring system of the indexing axis.

References

Function Manual Basic Functions; Chapter "R1: Referencing"

Extended Functions

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843

T1: Indexing axes

17.2 Detailed description

Continuous traversing (JOG CONT)

Jog mode

In the jog mode (SD41050 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 1) the indexing axis

traverses in the selected direction after the traversing key has been actuated. The indexing

axis is stopped at the next possible indexing position after releasing the traversing key. The

indexing position where the axis stops is dependent on:

● Distance to the indexing position

● Traversing velocity

● Axis dynamic response

Continuous operation

In continuous operation (SD41050 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 0), after

actuating the traversing key (first rising edge), the indexing axis is traversed as usual. The

indexing axis is stopped at the next possible indexing position when the traversing key is

actuated again (second rising edge). The indexing position where the axis stops is dependent

on:

● Distance to the indexing position

● Traversing velocity

● Axis dynamic response

Generally, indexing axes are traversed in the jog mode.

Direction change

If, before reaching the indexing position, the operator changes the direction by actuating the

traversing key for the opposite direction, the indexing axis continues to traverse to the next

possible indexing position where it can then be stopped. The traversing motion must then be

started in the opposite direction by again actuating the traversing key.

References

You can find detailed information on the traversing axes in the JOG mode in:

Function Manual Extended Functions, Chapter "H1: Manual traversing (Page 143)"

Incremental traversing (INC)

Independent of the active technology function (INC1, INC10, ... , INCvar), the indexing axis

always moves in the selected direction to the next indexing position after the traversing key

has been pressed.

Jog mode

In the jog mode (SD41050 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 1), the indexing axis

is immediately stopped after releasing the traversing key. Under certain circumstances, the

indexing axis is then notlocated at an indexing position. Traversing motion is continued at the

indexing position by again actuating the traversing key.

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17.2 Detailed description

Continuous operation

In continuous operation (SD41050 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 0), after

actuating the traversing key (first rising edge), the indexing axis is traversed as usual. The

indexing axis is immediately stopped when the traversing key is actuated again (second rising

edge). Under certain circumstances, the indexing axis is then notlocated at an indexing

position. Traversing motion is continued at the indexing position by again actuating the

traversing key.

Revolutional feedrate

The revolution feedrate with which the indexing axis is traversed in the JOG mode is dependent

on:

SD41100 $SN_JOG_REV_IS_ACTIVE, bit 0 = <value>

<Value>

Meaning

Depending on the traversing mode, the revolutional feed rate is defined by the following

setting data:

● The indexing axis traverses as positioning axis:

SD43300 $SA_ASSIGN_FEED_PER_REV_SOURCE (revolutional feedrate for

positioning axes)

● The indexing axis traverses as geometry axis, on which a frame with rotation acts:

SD42600 $SC_JOG_FEED_PER_REV_SOURCE (revolutional feedrate in JOG)

The indexing axis is traversed with a rotational feedrate derived from the master spindle:

Corresponding machine data:

● MD32050 $MA_JOG_REV_VELO (revolutional feed rate for JOG mode)

● MD32040 $MA_JOG_REV_VELO_RAPID (revolutional feed rate for JOG with rapid

traverse override)

References

● Function Manual Basic Functions; Chapter "V1: Feedrates"

● Function Manual Extended Functions, Chapter "H1: Manual and handwheel travel"

● Programming Manual, Fundamentals, Chapter "Feedrate control".

17.2.3

Traversing of indexing axes by PLC

Indexing axes can be traversed from the PLC user program.

● Competing positioning axes, see Chapter "P2: Positioning axes (Page 683)"

● Asynchronous subprograms (ASUBs)

Reference:

Function Manual Basic Functions; K1: Mode group, channel, program operation, reset

response (K1)

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T1: Indexing axes

17.3 Commissioning

17.3

Commissioning

17.3.1

Machine data for indexing axes

Indexing axis

An axis is defined as indexing axis by assigning an indexing position table to this axis, using

the following axis-specific machine data:

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB = <value>

<Value>

Meaning

The axis is assigned indexing position table 1.

The axis is assigned indexing position table 2.

Equidistant indexing intervals (Page 849)

First indexing position for indexing axes with equidistant positions

For an indexing axis with equidistantpositions, the absolute position of the first indexing position

is set using the following axes-specific machine data:

MD30503 $MA_INDEX_AX_OFFSET

Indexing position tables

In the indexing position tables, the indexing positions are saved in mm, inches or degrees.

Presently, two indexing position tables are available.

MD10910 $MN_INDEX_AX_POS_TAB_1 [ <n> ] (indexing position table 1)

MD10930 $MN_INDEX_AX_POS_TAB_2 [ <n> ] (indexing position table 2)

with <n> = 0 ... (maximum number - 1)

Multiple table assignment

Several axes can be assigned to an indexing position table.

Precondition: the axes are of the same type (linear axis, rotary axis, modulo 360° function)

General supplementary conditions

● The indexing positions must be listed in the indexing position table without gaps in an

ascending order.

● Indexing positions that follow one another must not be identical.

● The indexing positions must be specified in the basic coordinate system.

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17.3 Commissioning

Additional secondary conditions for modulo rotary axes

● Permissible range: 0° ≤ indexing position < 360°

● If the indexing axis is at the last indexing position in the indexing position table, when

traversing to the next indexing position in the positive direction of rotation, the first indexing

position is approached.

● If the indexing axis is at the first indexing position in the indexing position table, when

traversing to the next indexing position in the negative direction of rotation, the last indexing

position is approached.

No. of indexing positions

A maximum of 60 indexing positions can be entered in an indexing position table. The actual

number of indexing positions that is used or the programmable number is defined using

machine data:

MD10900 $MN_INDEX_AX_LENGTH_POS_TAB_1 (number of indexing positions of indexing

position table 1)

MD10920 $MN_INDEX_AX_LENGTH_POS_TAB_2 (number of indexing positions of indexing

position table 2)

Note

Entries in the indexing positions table that exceed the parameterized number of indexing

positions are not considered.

System of units for indexing positions

The system of units of indexing positions is defined on an NC-specific basis:

MD10270 $MN_POS_TAB_SCALING_SYSTEM = <value>

<Value>

System of units

Metric

inch

Note

The machine data is only evaluated if the following applies: MD10260

$MN_CONVERT_SCALING_SYSTEM == 1

Displaying the actual indexing position

When traversing indexing axes, the machine data is used to define at which actual position

the display of the actual indexing position changes in the system variable

$AA_ACT_INDEX_AX_POS_NO:

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T1: Indexing axes

17.3 Commissioning

MD10940 $MN_INDEX_AX_MODE, bit 0 = <value>

Bit

<Value>

Meaning

The actual indexing position, indicated in system variable $AA_ACT_IN-

DEX_AX_POS_NO, changes when reaching/passing the exact stop window fine

(MD36010 $MA_STOP_LIMIT_FINE) of the next indexing position in the traversing

direction.

The actual indexing position indicated in system variable $AA_ACT_IN-

DEX_AX_POS_NO changes when reaching/passing half the traversing distance to

the next indexing position in the traversing direction.

①

Traversing range of the indexing axis (linear axes or rotary modulo axis) with indexing

positions and exact stop windows fine

②

Traversing direction-dependent indexing position indicated in the system variable

$AA_ACT_INDEX_AX_POS_NO

③

Traversing range of the indexing axis (linear axes or rotary modulo axis) with indexing

positions

Example

Assumptions:

● MD10940 $MN_INDEX_AX_MODE, bit 0 == 1

● The axis is located in front of an indexing position outside the tolerance window "exact stop

fine" (DB31,

DBX60.7 == 0)

Although system variable $AA_ACT_INDEX_AX_POS_NO indicates indexing position 2, with

the "Traverse to next position" command, indexing position 3 is not approached, but first

precisely to indexing position 2. Only when the axis is precisely at (DB31,

DBX60.7 == 1)

- or is located after the displayed indexing position, using the "Traverse to next position"

command, the next indexing position is approached, in the example, indexing position 3. This

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T1: Indexing axes

17.3 Commissioning

means that the indexing position is approached that is the closest in the traversing direction !

Under certain circumstances, it is therefore necessary to issue the "traverse to next position"

command twice to move from the currently displayed indexing position to the next indexing

position.

17.3.2

Machine data for equidistant indexing intervals

17.3.2.1

Features

Distance between indexes

The index distance is determined for equidistant index intervals according to the following

formula:

1XPHUDWRU 0'

0$B,1'(;B$;B180(5$725

'LVWDQFH

'HQRPLQDWRU 0'

0$B,1'(;B$;B'(120,1$725

Linear axes

0$B,1'(;B$;B2))6(7 VW GLVWDQFH IURP ]HUR SRLQW SRVLWLYH

'LVWDQFH VWDQGDUG IRU DOO LQGH[LQJ SRVLWLRQV VHH DERYH

0$B,1'(;B$;B2))6(7 VW GLVWDQFH IURP ]HUR SRLQW QHJDWLYH

'LVWDQFH VWDQGDUG IRU DOO LQGH[LQJ SRVLWLRQV VHH DERYH

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T1: Indexing axes

17.3 Commissioning

Modulo rotary axes

1XPHUDWRU 0'

0$B02'8/2B5$1*(

,QGH[

'HQRPLQDWRU 0'

0$B,1'(;B$;B'(120,1$725

0$B,1'(;B$;B2))6(7

6SDFLQJ

6L]H RI PRGXOR UDQJH 0'

0$B02'8/2B5$1*(

,QGH[

1XPEHU RI LQGH[HV LQ PRGXOR UDQJH 0'

0$B,1'(;B$;B'(120,1$725

17.3.2.2

Hirth axis

Function

For a "Hirth axis", using a special gearing (Hirth gearing) the rotary axis is interlocked when

reaching an indexing position. In this case, a locking bolt or a gearwheel is engaged using a

linear axis. In order that the mechanical system of the machine is not damaged, the interlock

can only be engaged at an indexing position. For a Hirth axis, all of the indexing positions must

have the same the distance between one another (equidistant indexing positions).

Preconditions

● The "Hirth axis" must be a rotary axis.

● The "Hirth axis" must be an indexing axis. See Chapter "Commissioning (Page 846)"

● The active measuring system of the indexing axis must be synchronized or referenced:

DB31, ... DBX60.4/.5 == 1 (referenced/synchronized, encoder 1/2)

References: Function Manual Basic Functions; reference point approach (R1)

Extended Functions

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17.3 Commissioning

Commissioning

Machine data

● MD30300 $MA_IS_ROT_AX = 1 (rotary axis)

● MD30505 $MA_HIRTH_IS_ACTIVE[ <axis> ] = 1 (indexing axis with Hirth gearing)

● MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ <axis> ] = 3 (indexing axis with

equidistant indexing positions)

17.3.3

Axis-specific system variables

$AA_PROG_INDEX_AX_POS_NO

Function

The system variable includes the number of the indexing position programmed for the indexing

axis.

Syntax

$AA_PROG_INDEX_AX_POS_NO[<axis>]

Meaning

$AA_PROG_INDEX_AX_POS_NO

The axis is not an indexing axis, or presently the indexing axis is not traversing to an indexing

position

> 0

Number of programmed indexing position

$AA_ACT_INDEX_AX_POS_NO

Function

The system variable includes the number of the indexing position last reached by the indexing

axis, or indexing position that was passed by the indexing axis.

Syntax

$AA_ACT_INDEX_AX_POS_NO[<axis>]

Meaning

$AA_ACT_INDEX_AX_POS_NO

The axis is not an indexing axis.

> 0

Number of the last indexing position reached or passed

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17.4 Programming

17.3.4

NC/PLC interface signals

Axis-specific interface signals

When stopping the indexing axis at an indexing position ± exact stop window fine (MD36010

$MA_STOP_LIMIT_FINE), then the axis-specific interface signal is set:

DB31, ... DBX76.6 = 1 (indexing axis in position)

17.4

Programming

Coded position

To allow indexing axes to be positioned from the NC part program, special instructions are

provided with which the indexing numbers (e.g. location numbers) are programmed instead of

axis positions in mm or degrees. The availability of a special instruction depends on the axis

type (linear or rotary axis):

Statement

Effect

Availability

CAC(i)

Traverse coded position in absolute terms

Linear axis, rotary axis

CACP(i)

Traverse coded position ain absolute terms in

Rotary axis

the positive direction

CACN(i)

Traverse coded position ain absolute terms in

Rotary axis

the negative direction

CDC(i)

Traverse coded position along the direct

Rotary axis

(shortest) path

CIC(i)

Traverse coded position incrementally

Linear axis, rotary axis

Coded position (indexing position)

Value range of i:

0 ... 59; whole number (positive and negative values are possible

in CIC)

Examples

Program code

Comment

POS[B]=CAC(20)

Indexing axis B approaches the coded position (indexing) 20

in absolute mode. The direction of traversing depends on

the current actual position.

POS[B]=CACP(10)

Indexing axis B approaches the coded position (index posi-

tion ) 10 in absolute mode with positive direction of rota-

tion (possible only for rotary axes).

POS[B]=CACN(10)

Indexing axis B approaches the coded position (index posi-

tion ) 10 in absolute mode with negative direction of rota-

tion (possible only for rotary axes).

POS[B]=CDC(50)

Indexing axis B approaches indexing position 50 directly

along the shortest path (possible only for rotary axes).

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17.4 Programming

Program code

Comment

POS[B]=CIC(-4)

Indexing axis B traverses four indexing positions incremen-

tally from its current position. in a negative direction.

POS[B]=CIC(35)

Indexing axis B traverses 35 indexing positions incremen-

tally from its present position in a positive direction.

Special features

● Modulo rotary axis as indexing axis

On modulo rotary axes, the indexing positions are divided in factors of 360° and approached

directly.

● Indexing axis is between two indexing positions

The specified position instructions have the following effect in the AUTOMATIC mode.

POS[B]=CIC(1)

The next higher indexing position is approached.

POS[B]=CIC(-1)

The next lower indexing position is approached.

POS[B]=CIC(0)

The indexing axis is not traversed.

System variables

The number of the indexing position programmed last can be read with the following system

variables:

$AA_PROG_INDEX_AX_POS_NO

The number of the indexing position traversed last can be displayed with the following system

variables:

$AA_ACT_INDEX_AX_POS_NO

The display depends on the setting in machine data:

MD10940 $MN_INDEX_AX_MODE (settings for indexing position)

Bit

Value

Meaning

The indexing position changes when the indexing position is reached ("exact stop fine"

window) and remains unchanged until the next indexing position is reached. The in-

dexing area thus begins at one indexing position and ends in front of the next indexing

position.

The indexing position changes when half the indexing position is reached.

A quasi-symmetrical indexing area is thus applied around the indexing position (sym-

metrical only on linear axes with equidistant indexing or modulo rotary axes on which

the indexing area is an integer multiple of the modulo range (MD30330 $MA_MODU-

LO_RANGE), otherwise proportional to the distances between the indexing positions).

On modulo rotary axes, the area between the last indexing position and the first index-

ing position is divided proportionally based on the lengths of the first indexing area and

the last indexing area.

The following graphics will illustrate the difference between Bit 0 = 0 and Bit 0 = 1:

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17.5 Supplementary conditions

System variable $AA_ACT_INDEX_AX_POS_NO

$AA_ACT_INDEX_AX_POS_NO: Number of the last indexing position reached or passed

Indexing positions

For axis type

Values

Description

Modulo rotary axis

1, ... n

n = number of indexing positions (Page 846)

Linear axis

0, 1, 2, 3, ... 59, 60,

The actual position lies below the lowest indexing

position

The actual position lies above the highest indexing

position

Equidistant indexing positions

For axis type

Values

Description

Modulo rotary axis

1 ... m

m = denominator (counter)

Linear axis

... -3, -2, -1, 0, 1, 2,

3, ...

17.5

Supplementary conditions

Indexing axes

Various channel and axis-specific NC/PLC interface signals

If, while an indexing axis is traversed, at least one of the following signals occurs, then the axis

stops immediately. The indexing positions are not taken into account.

● Channel-specific signals

- DB21, ... DBB4 == 0 (feedrate override)

- DB21, ... DBX6.2 == 1 (delete distance-to-go)

- DB21, ... DBX7.3 == 1 (NC Stop)

- DB21, ... DBX7.4 == 1 (NC Stop axes plus spindles)

- DB21, ... DBX7.7 == 1 (reset)

● Axisspecific signals

- DB31, ... DBX4.3 == 1 (feedrate stop)

Synchronized actions

● Stop (MOV=0)

If an indexing axis is stopped with a synchronized action using MOV=0, then the axis stops

in the traversing direction at the next possible indexing position

● Delete distance to go (DELDTG)

If, for an indexing axis, the distance to go is deleted with a synchronized action using

DELDTG, then the axis is immediately stopped without stopping at an indexing position

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T1: Indexing axes

17.5 Supplementary conditions

References: Function Manual Synchronized Actions

Frames and work offsets

In conjunction with indexing axes, generally frames are not necessary. As a consequence, we

recommend that frames and work offsets for indexing axes are suppressed in NC programs.

Software limit switch

When manually traversing an indexing axis in the JOG or JOG/INC operating mode, the

indexing axis traverses - as a maximum up - to the last indexing position before the software

limit switch.

Manual traversing using a handwheel (DRF)

When traversing an indexing axis using the handwheel, the indexing positions are not taken

into account. This means that the indexing axis stops immediately, also between two indexing

positions, with the end of the handwheel pulse.

"Hirth axes"

In addition to the secondary conditions mentioned above, for "Hirth axes" the following

additional secondary conditions must be observed.

Various channel and axis-specific NC/PLC interface signals

If, while a "Hirth axis" is being traversed, at least one of the following signals occurs, then the

axis stops immediately at the next possible indexing position in the traversing direction.

● Channel-specific signals

- DB21, ... DBB4 == 0 (feedrate override)

- DB21, ... DBX6.2 == 1 (delete distance-to-go)

- DB21, ... DBX7.3 == 1 (NC Stop)

- DB21, ... DBX7.4 == 1 (NC Stop axes plus spindles)

- DB21, ... DBX7.7 == 1 (reset)

● Axisspecific signals

- DB31, ... DBX4.3 == 1 (feedrate stop)

Emergency Stop

If, while a "Hirth axis" is being traversed, an Emergency Stop is initiated then the axis is

immediately stopped:

DB10 DBX56.1 == 1 (Emergency Stop)

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17.5 Supplementary conditions

References: Function Manual Basic Functions; Chapter "N2: Emergency Stop"

NOTICE

Approaching the indexing position

After an Emergency Stop, before the interlocking of the Hirth gearing at the machine is

reactivated, either the PLC user program or the operator (manually) must first move the "Hirth

axis" to an indexing position in the JOG mode.

Synchronized actions

● Delete distance to go (DELDTG)

If, for a "Hirth axis", the distance to go is deleted with a synchronized action using

DELDTG, then the axis is stopped at the next possible indexing position in the traversing

direction

References: Function Manual Synchronized Actions, Chapter "Detailed description" >

"Actions in synchronized actions" > "Delete distance to go (DELDTG)"

Various axis-specific functions

"Hirth axes" may not be used in conjunction with the following functions:

● Kinematic transformation

References: Function Manual Extended Functions, Chapter "M1: Kinematic transformation"

● Work offset by setting the actual value: PRESETON

References: Programming Manual, Job Planning, Chapter "Coordinate transformations

(frames)"

● Revolutional feedrate (G95, FPRAON)

● Manual traversing using a handwheel as well as distance or velocity overlay using the

handwheel (DFR)

References: Function Manual Extended Functions, Chapter "H1: Manual traversing and

manual traversing using a handwheel"

● Frames

References: Function Manual Basic Functions, Chapter "K2: Axes, coordinate systems,

frames" > "Frames"

● Interpolatory corrections, for example external work offset, DRF offset

● Couplings

It is not permissible that a "Hirth axis" is a following axis of one of the following couplings:

- following axis with master value coupling

References: Function Manual Special Functions, Chapter "M3: Axis couplings" >

"Leading value coupling" or "Generic couplings"

- Coupled motion axis

References: Function Manual Special Functions, Chapter "M3: Axis couplings" >

"Coupled motion" or "Generic couplings"

- gantry following axis

References: Function Manual Special Functions, Chapter "G1: Gantry axes"

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17.6 Examples

17.6

Examples

17.6.1

Example 1: Rotary axis as indexing axis

Machine axes AX5 is a tool revolver, with 8 revolver locations (endlessly rotating rotary axis).

The distances between the revolver locations are constant (equidistant indexing positions).

,QGH[LQJ

SRVLWLRQ

$[LV SRVLWLRQ

Figure 17-3

Tool turret with 8 locations

Indexing position table 1

MD10910 $MN_INDEX_AX_POS_TAB_1[ 0 ] = 0

1st indexing position = 0°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 1 ] = 45

2nd indexing position = 45°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 2 ] = 90

3rd indexing position = 90°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 3 ] = 135

4th indexing position = 135°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 4 ] = 180

5th indexing position = 180°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 5 ] = 225

6th indexing position = 225°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 6 ] = 270

7th indexing position = 270°

MD10910 $MN_INDEX_AX_POS_TAB_1[ 7 ] = 315

8th indexing position = 315°

Length of the indexing position table (1)

MD10900 $MN_INDEX_AX_LENGTH_POS_TAB_1= 8

8 indexing positions in table 1

Defining machine axis AX5 as rotary modulo axis and indexing axis

MD30300 $MA_IS_ROT_AX[ AX5 ] = 1

Rotary axis

MD30310 $MA_ ROT_IS_MODULO [AX5] = 1

Modulo rotary axis

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB [AX5] = 1

Indexing axis, indexing position table 1

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17.6 Examples

17.6.2

Example 2: Indexing axis as linear axis

Machine axis AX6 is a workholder with 10 locations. The distances between the 10 locations

are different. The first location is at position -100 mm. Machine axis is AX6.

,QGH[LQJ SRVLWLRQ

$[LV SRVLWLRQ >PP@

Figure 17-4

Indexing positions for a workholder

Indexing position table 2

MD10930 $MN_INDEX_AX_POS_TAB_2[ 0 ] = -100

1st indexing position = -100 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 1 ] = 0

2nd indexing position = 0 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 2 ] = 100

3rd indexing position = 100 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 3 ] = 200

4th indexing position = 200 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 4 ] = 300

5th indexing position = 300 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 5 ] = 500

6th indexing position = 500 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 6 ] = 700

7th indexing position = 700 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 7 ] = 900

8th indexing position = 900 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 8 ] = 1250

9th indexing position = 1250 mm

MD10930 $MN_INDEX_AX_POS_TAB_2[ 9 ] = 1650

10. Indexing position = 1650 mm

Length of the indexing position table (1)

MD10920 $MN_INDEX_AX_LENGTH_POS_TAB_2 = 10

10 indexing positions in table 2

Defining machine axis AX5 as indexing axis

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB [AX6] = 2

Indexing axis, indexing position table 2

17.6.3

Example 3: Rotary modulo axis as equidistant indexing axis

Machine axis AX4 is rotary modulo axis with equidistant indexing. Indexing starts at 5°. The

difference between the indexing positions is 20°.

The following indexing positions are obtained:

5, 25, 45, 65, 85, 105, 125, 145, 165, 185, 205, 225, 245, 265, 285, 305, 325, 245 [Degrees]

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17.6 Examples

Indexing data

MD30501 $MA_INDEX_AX_NUMERATOR[ AX4 ] ⇒

This value is ignored for rotary modulo

axes, and MD30330 $MA_MODU-

MD30330 $MA_MODULO_RANGE[ AX4 ] = 360.0

LO_RANGE (default value: 360°) is

used instead.

MD30502 $MA_INDEX_AX_DENOMINATOR[ AX4 ] = 18

Number of indexing positions = 360° /

20° = 18

MD30503 $MA_INDEX_AX_OFFSET[ AX4 ] = 5.0

First indexing position = 5.0°

MD30505 $MA_HIRTH_IS_ACTIVE[ AX4 ] = 0

No Hirth gearing

Defining machine axis AX4 as rotary modulo axis and equidistant indexing axis

MD30300 $MA_IS_ROT_AX[ AX4 ] = 1

Rotary axis

MD30310 $MA_ ROT_IS_MODULO[ AX4 ] = 1

Modulo function active

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ AX4 ] = 3

Equidistant indexing axis

17.6.4

Example 4: Rotary axes as equidistant indexing axis with restricted traversing

range

Machine axis AX4 is a rotary axis with equidistant indexing. The equidistant indexing positions

are every 20°, starting at 100°. Positions less than 100° and greater than 260° should not be

approached.

The following indexing positions are obtained:

100, 120, 140, 160, 180, 200, 220, 240, 260 [degrees]

Indexing data

MD30501 $MA_INDEX_AX_NUMERATOR[ AX4 ] = 360.0

Numerator = 360°

MD30502 $MA_INDEX_AX_DENOMINATOR[ AX4 ] = 18

Number of indexing positions = 360° /

20° = 18

MD30503 $MA_INDEX_AX_OFFSET[ AX4 ] = 100.0

First indexing position = 100.0°

MD30505 $MA_HIRTH_IS_ACTIVE[ AX4 ] = 0

No Hirth gearing

Defining machine axis AX4 as rotary modulo axis and equidistant indexing axis

MD30300 $MA_IS_ROT_AX[ AX4 ] = 1

Rotary axis

MD30310 $MA_ ROT_IS_MODULO[ AX4 ] = 1

Modulo function active

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ AX4 ] = 3

Equidistant indexing axis

MD36100 $MA_POS_LIMIT_MINUS[ AX4 ] = 100.0

1st software limit switch minus = 100.0°

MD36110 $MA_POS_LIMIT_PLUS[ AX4 ] = 260.0

1st software limit switch plus = 260.0°

17.6.5

Example 5: Linear axis as equidistant indexing axis

Machine axis AX4 is a linear axis with equidistant indexing. The equidistant indexing positions

are every 10 mm, starting at -200 mm.

Extended Functions

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T1: Indexing axes

17.6 Examples

The following indexing positions are obtained:

-200, -190, -180, ... 180, 190, 200 [mm]

Indexing data

MD30501 $MA_INDEX_AX_NUMERATOR[ AX4 ] = 10.0

Numerator = 10

MD30502 $MA_INDEX_AX_DENOMINATOR[ AX4 ] = 1

Denominator = 1

MD30503 $MA_INDEX_AX_OFFSET[ AX4 ] = -200.0

First indexing position = -200.0°

MD30505 $MA_HIRTH_IS_ACTIVE[ AX4 ] = 0

No Hirth gearing

Defining machine axis AX4 as linear axis and equidistant indexing axis

MD30300 $MA_IS_ROT_AX[ AX4 ] = 0

Linear axis

MD30310 $MA_ ROT_IS_MODULO[ AX4 ] = 0

Modulo function is not active

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ AX4 ] = 3

Equidistant indexing axis

MD36100 $MA_POS_LIMIT_MINUS[ AX4 ] = -200.0

1st software limit switch minus = -200.0

MD36110 $MA_POS_LIMIT_PLUS[ AX4 ] = 200.0

1st software limit switch plus = 200.0

17.6.6

Example 6: "Hirth axis"

Machine axis AX4 is a "Hirth axis" (rotary modulo axis with equidistant indexing and Hirth

gearing). The equidistant indexing positions are every 1°, starting at 0°.

Indexing data

MD30501 $MA_INDEX_AX_NUMERATOR[ AX4 ] ⇒

This value is ignored for rotary modulo

axes, and MD30330 $MA_MODU-

MD30330 $MA_MODULO_RANGE[ AX4 ] = 360.0

LO_RANGE (default value: 360°) is

used instead.

MD30502 $MA_INDEX_AX_DENOMINATOR[ AX4 ] = 360

Number of indexing positions = 360° /

1° = 360

MD30503 $MA_INDEX_AX_OFFSET[ AX4 ] = 0.0

First indexing position = 0.0°

MD30505 $MA_HIRTH_IS_ACTIVE[ AX4 ] = 1

Hirth gearing

Defining machine axis AX4 as linear axis and equidistant indexing axis

MD30300 $MA_IS_ROT_AX[ AX4 ] = 1

Rotary axis

MD30310 $MA_ ROT_IS_MODULO[ AX4 ] = 1

Modulo function active

MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ AX4 ] = 3

Equidistant indexing axis

MD36100 $MA_POS_LIMIT_MINUS[ AX4 ] = -200.0

1st software limit switch minus = -200.0

MD36110 $MA_POS_LIMIT_PLUS[ AX4 ] = 200.0

1st software limit switch plus = 200.0

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

861

T1: Indexing axes

17.7 Data lists

17.7

Data lists

17.7.1

Machine data

17.7.1.1

General machine data

Number

Identifier: $MN_

Description

10260

CONVERT_SCALING_SYSTEM

Basic system switchover active

10270

POS_TAB_SCALING_SYSTEM

System of measurement of position tables

10900

INDEX_AX_LENGTH_POS_TAB_1

Number of positions for indexing axis table 1

10910

INDEX_AX_POS_TAB_1[n]

Indexing position table 1

10920

INDEX_AX_LENGTH_POS_TAB_2

Number of positions for indexing axis table 2

10930

INDEX_AX_POS_TAB_2[n]

Indexing position table 2

10940

INDEX_AX_MODE

Options for indexing positions

17.7.1.2

Axis/spindlespecific machine data

Number

Identifier: $MA_

Description

30300

IS_ROT_AX

Rotary axis

30310

ROT_IS_MODULO

Modulo conversion for rotary axis

30320

DISPLAY_IS_MODULO

Position display is modulo 360°

30500

INDEX_AX_ASSIGN_POS_TAB

Axis is indexing axis

30501

INDEX_AX_NUMERATOR

Numerator for indexing axes with equidistant positions

30502

INDEX_AX_DENOMINATOR

Denominator for indexing axes with equidistant posi-

tions

30503

INDEX_AX_OFFSET

Indexing position for indexing axes with equidistant po-

sitions

30505

HIRTH_IS_ACTIVE

Hirth tooth system is active

17.7.2

Setting data

17.7.2.1

General setting data

Number

Identifier: $SN_

Description

41050

JOG_CONT_MODE_LEVELTRIGGRD

JOG continuous in inching mode

Extended Functions

862

Function Manual, 12/2018, A5E40874029B AB

W4: Grinding-specific tool offset and tool monitoring

18.1

Grinding-specific tool data

18.1.1

Structure of tool data

Grinding tools (tool type: 400 to 499) normally have specific tool and dresser data in addition

to cutting edge data.

The grinding wheel-specific data for the left and right wheel geometry can be stored under a

T number in the tool cutting edges D1 and D2.

If data is needed for the dresser geometry, it can be stored as follows:

● In the tool cutting edges from D3 of a T number

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● In additional cutting edge-specific parameters (see MD18096

$MN_MM_NUM_CC_TOA_PARAM)

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<t>: T number

<d>: D number

The following figure provides an overview of the (possible) storage structure of the tool data

for grinding tools:

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

865

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

7 QXPEHU

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Figure 18-1

Structure of the tool data for grinding tools

18.1.2

Cutting edge-specific parameters

18.1.2.1

List of cutting edge-specific parameters

The cutting edge-specific tool parameters for grinding tools have the same meaning as those

for turning and milling tools.

Tool parameter

Meaning

Comment

$TC_DP1

Tool type

$TC_DP2

Cutting edge position

For turning and grinding

tools only

Geometry - tool length compensation

$TC_DP3

Length 1

$TC_DP4

Length 2

$TC_DP5

Length 3

Extended Functions

866

Function Manual, 12/2018, A5E40874029B AB

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

Tool parameter

Meaning

Comment

Geometry - tool radius compensation

$TC_DP6

Radius 1

$TC_DP7

Reserved

$TC_DP8

Reserved

$TC_DP9

Reserved

$TC_DP10

Reserved

$TC_DP11

Reserved

Wear - tool length compensation

$TC_DP12

Length 1

$TC_DP13

Length 2

$TC_DP14

Length 3

Wear - tool radius compensation

$TC_DP15

Radius 1

$TC_DP16

Reserved

$TC_DP17

Reserved

$TC_DP18

Reserved

$TC_DP19

Reserved

$TC_DP20

Reserved

Base dimension/adapter dimension - tool length compensation

$TC_DP21

Basic length 1

$TC_DP22

Basic length 2

$TC_DP23

Basic length 3

Technology

$TC_DP24

Undercut angle

For turning tools only

$TC_DP25

Reserved

Note

The cutting edge data for D1 and D2 of a selected grinding tool can be chained, i.e. if a

parameter in D1 or D2 is modified, then the same parameter in D1 or D2 is automatically

overwritten with the new value (see $TC_TPG2 (Page 870)).

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

867

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

18.1.2.2

$TC_DP1

The parameter $TC_DP1 contains the 3-digit number of the grinding tool type:

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Number

Grinding tool type

400

Surface grinding wheel

401

Surface grinding wheel with monitoring with tool base dimension for GWPS

402

Surface grinding wheel without monitoring without tool base dimension for GWPS

403

Surface grinding wheel with monitoring without tool base dimension for GWPS

410

Facing wheel

411

Facing wheel with monitoring with tool base dimension for GWPS

412

Facing grinding wheel without monitoring without tool base dimension for GWPS

413

Facing wheel with monitoring without tool base dimension for GWPS

490

Dresser

18.1.2.3

Definition of additional parameters $TC_DPC1 ... 10

For user-specific cutting edge data, the additional parameters $TC_DPC1 to $TC_DPC10 can

be set up independent of the tool type via the following memory-configuring machine data:

MD18096 $MN_MM_NUM_CC_TOA_PARAM

NOTICE

Loss of data due to reconfiguration

Reconfiguration of the local static NC memory results in a loss of data on the active and

passive file system. We therefore urgently recommend archiving or backing up all relevant

data by creating a commissioning archive before activating a modified memory configuration.

Extended Functions

868

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W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

18.1.3

Tool-specific parameters

18.1.3.1

List of tool-specific parameters

The tool-specific parameters are automatically set up with every new grinding tool (tool type:

400 to 499).

Note

Tool-specific parameters have the same characteristics as a cutting edge.

This is to be taken into account when the number of cutting edges is specified:

MD18100 $MN_MM_NUM_CUTTING_EDGES_IN_TOA

When all the cutting edges of a tool are deleted, the associated tool-specific parameters are

deleted at the same time.

Parameters

The parameters are assigned as follows:

Parameter

Meaning

Data type

$TC_TPG1 (Page 870)

Spindle number

INT

$TC_TPG2 (Page 870)

Chaining rule

INT

$TC_TPG3 (Page 871)

Minimum wheel radius

REAL

$TC_TPG4 (Page 871)

Minimum wheel width

REAL

$TC_TPG5 (Page 871)

Current wheel width

REAL

$TC_TPG6 (Page 872)

Maximum speed

REAL

$TC_TPG7 (Page 872)

Maximum peripheral speed

REAL

$TC_TPG8 (Page 872)

Angle of inclined wheel

REAL

$TC_TPG9 (Page 873)

Parameter number for radius calculation

INT

$TC_TPG_DRSPATH (Page 873)

Directory path to the dressing program

STRING

$TC_TPG_DRSPROG (Page 873)

Dressing program name

STRING

Note

The monitoring data applies to both the left-hand and the right-hand cutting edge of the grinding

wheel.

The tool-specific parameters take effect:

● when switching on the grinding-specific tool monitoring (Page 888)

● when switching on the constant grinding wheel peripheral speed (GWPS) (Page 891)

If a changed date is to take effect, these functions must be switched on again.

The length compensations always specify the distances between the tool carrier reference

point and the tool tip in the Cartesian coordinates (must be noted for inclined grinding wheel).

Extended Functions

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869

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

18.1.3.2

$TC_TPG1

The spindle number is entered in parameter $TC_TPG1. The grinding wheel circumferential

velocity is then monitored for this spindle.

18.1.3.3

$TC_TPG2

The tool parameters of the two cutting edges D1 and D2 are entered in parameter $TC_TPG2,

their values must always be the same. If, for a cutting edge, the value of one of these

parameters is changed, then the corresponding parameter of the other cutting edge is

automatically set to the same value.

The tool parameters are coded in parameter $TC_TPG2:

Tool parameter

Meaning

Coding

Bit

Hex

Dec

$TC_DP1

Tool type

0001

$TC_DP2

Length of cutting

0002

edge

Geometry - tool length compensation

$TC_DP3

Length 1

0004

$TC_DP4

Length 2

0008

$TC_DP5

Length 3

0010

$TC_DP6

Radius

0020

$TC_DP7

Reserved

0040

$TC_DP8

Length 4

0080

128

$TC_DP9

Length 5

0100

256

$TC_DP10

Angle 1 etc.

0200

512

$TC_DP11

Reserved

0400

1 024

Wear - tool length compensation

$TC_DP12

Length 1

0800

2 048

$TC_DP13

Length 2

1000

4 096

$TC_DP14

Length 3

2000

8 192

$TC_DP15

Radius

4000

16 384

$TC_DP16

Reserved

8000

32 768

$TC_DP17

Wear length 4

1 0000

65 536

$TC_DP18

Wear length 5

2 0000

131 072

$TC_DP19

Wear angle 1 etc.

4 0000

262 144

$TC_DP20

Reserved

8 0000

524 288

Base dimension/adapter dimension - tool length compensation

$TC_DP21

Basic length 1

10 0000

1 048 576

$TC_DP22

Basic length 2

20 0000

2 097 152

$TC_DP23

Basic length 3

40 0000

4 194 304

Technology

$TC_DP24

Reserved

80 0000

8 388 608

$TC_DP25

Reserved

100 0000

16 777 216

Extended Functions

870

Function Manual, 12/2018, A5E40874029B AB

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

Change becomes effective

If parameter $TC_TPG2 becomes effective at a later point in time, the values of the tool

parameters of the cutting edges are not automatically aligned immediately. The alignment is

only made the next time that a tool parameter of both cutting edges is changed.

Example

For a grinding tool (T1), the following parameters should be kept the same for cutting edges

D1 and D2:

Tool parameter

Meaning

Coding: Hex

Coding: Decimal

$TC_DP1

Tool type

0001

Geometry - tool length compensation

$TC_DP3

Length 1

0004

$TC_DP4

Length 2

0008

$TC_DP5

Length 3

0010

Wear - tool length compensation

$TC_DP12

Length 1

0800

2 048

$TC_DP13

Length 2

1000

4 096

$TC_DP14

Length 3

2000

8 192

Base dimension/adapter dimension - tool length compensation

$TC_DP21

Basic length 1

10 0000

1 048 576

$TC_DP22

Basic length 2

20 0000

2 097 152

$TC_DP23

Basic length 3

40 0000

4 194 304

The sum of all parameter codings is entered in parameter $TC_TPG2:

$TC_TPG2 =

'H70381D'

'D7354397'

18.1.3.4

$TC_TPG3, $TC_TPG4

For grinding-specific tool monitoring (Page 888), thelower limit values of the grinding wheel

are entered in the parameters:

● Parameter $TC_TPG3: Radius [mm] or [inch]

● Parameter $TC_TPG4: Width [mm] or [inch]

Note

For inclined grinding wheels, the minimum radius must be entered in Cartesian coordinates.

18.1.3.5

$TC_TPG5

The actual width of the grinding wheel - e.g. after dressing - is entered in parameter $TC_TPG5.

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

871

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

18.1.3.6

$TC_TPG6 and $TC_TPG7

For grinding-specific tool monitoring (Page 888), theupper limit values of the grinding wheel

are entered in the parameters:

● Parameter $TC_TPG6: Speed [rpm]

● Parameter $TC_TPG7: Circumferential/peripheral speed [m*s^-1] or [inch*s^-1]

18.1.3.7

$TC_TPG8

For function "Constant grinding wheel peripheral speed (GWPS). (Page 891)", for an inclined

grinding wheel, the inclination angle α referred to the actual active plane (work plane G17, G18,

G19) is entered in parameter $TC_TPG8.

The permissible range of inclination angle α is: -90° ≤ α < +90°

;

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Figure 18-2

Inclined grinding wheel

Note

The tool length is not automatically compensated when the angle in parameter $TC_TPG8 is

changed.

Note

For machines with inclined axis, the same angle must be entered for the inclined axis as for

the inclined grinding wheel.

Extended Functions

872

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W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

18.1.3.8

$TC_TPG9

Parameter $TC_TPG9 is used to define to which tool parameters the following functions should

refer:

● Grinding-specific tool monitoring (Page 888)

● Constant grinding wheel peripheral speed (GWPS). (Page 891)

Examples:

$TC_TPG9 = <value>

<Value>

Reference variable

Length 1 (geometry + wear + base, depending on tool type)

Length 2 (geometry + wear + base, depending on tool type)

Length 3 (geometry + wear + base, depending on tool type)

Radius

18.1.3.9

$TC_TPG_DRSPATH and $TC_TPG_DRSPROG

Parameter $TC_TPG_DRSPATH (directory path to the dressing program) and

$TC_TPG_DRSPROG (dressing program) allow a dressing program to be assigned to a

grinding wheel. In turn, this allows a generally valid dressing procedure to be created, in which

the dressing program is executed using an indirect program call.

Example:

Program code

Comment

; Enter absolute dressing amount in $TC_DP12:

$TC_DP12[GETT("GRINDING_WHEEL",0),1]= $TC_DP12[GETT("GRINDING_WHEEL",0),1] - 0.01

G500

CYCLE435("GRINDING_WHEEL",1,"DRESSER",1)

; Calculate dressing tool position

T="DRESSER" D1

; Activate dressing tool.

; Indirectly call dressing program:

CALL "/"<<$TC_TPG_DRSPATH[GETT("GRINDING_WHEEL",0)]<<"/"<<$ TC_TPG_DRSPROG[GETT("GRINDING_WHEEL",0)]

M17

18.1.3.10

Definition of additional parameters $TC_TPC1 ... 10

For user-specific tool data, the additional parameters $TC_TPC1 to $TC_TPC10 can be set

up independent of the tool type via the following memory-configuring machine data:

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

873

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

MD18096 $MN_MM_NUM_CC_TDA_PARAM

NOTICE

Loss of data due to reconfiguration

Reconfiguration of the local static NC memory results in a loss of data on the active and

passive file system. We therefore urgently recommend archiving or backing up all relevant

data by creating a commissioning archive before activating a modified memory configuration.

18.1.3.11

Access to tool-specific parameters

Tool-specific parameters can be read and written from the part program.

Examples:

Program code

Comment

R10=$TC_TPG5[2]

; read the current width of tool 2 and store in R10

$TC_TPG6[3]=2000

; write value 2000 to the maximum speed of tool 3.

The following system variable allows the tool-specific parameters for the current tool to be

accessed:

$P_ATPG[<m>]

<m> = parameter numbewr (data type: REAL)

Example:

Parameter 3 ($TPG3[<t>])

Program code

Comment

$P_ATPG[3]=R10

; read the minimum wheel radius of the current tool and store

in R10.

18.1.4

Planes and axis assignments

Tool length compensations for the geometry axes or radius compensation in the plane are

assigned on the basis of the current machining plane.

The following planes and axis assignments are possible (abscissa, ordinate, applicate for 1st,

2nd and 3rd geometry axis):

Command

Plane

Axis perpendicular to plane

(abscissa/ordinate)

(applicate)

G17

X / Y

G18

Z / X

G19

Y / Z

Extended Functions

874

Function Manual, 12/2018, A5E40874029B AB

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

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;

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18.1.5

Examples

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)

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Figure 18-3

Required offset data of a surface grinding wheel

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

875

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

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Figure 18-4

Required offset data for inclined wheel with implicit monitoring selection and without base dimension for GWPS

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Figure 18-5

Required offset data for inclined wheel with implicit monitoring selection and with base dimension for GWPS

Extended Functions

876

Function Manual, 12/2018, A5E40874029B AB

W4: Grinding-specific tool offset and tool monitoring

18.1 Grinding-specific tool data

(QWULHV LQ

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Figure 18-6

Required offset data of a surface grinding wheel without base dimension for GWPS

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;

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Figure 18-7

Required offset data of a facing wheel with monitoring parameters

Extended Functions

Function Manual, 12/2018, A5E40874029B AB

877

W4: Grinding-specific tool offset and tool monitoring

18.2 Online tool offset

18.2

Online tool offset

18.2.1

Function

A grinding operation involves both machining of a workpiece and dressing of the grinding

wheel. These processes can take place in the same channel or in separate channels.

To allow machining to continue while the grinding wheel is being dressed, the reduction in the

size of the grinding wheel caused by dressing must be transferred to the current tool in the

machining channel as a tool offset that is applied immediately. This can be implemented by

means of the "Online tool offset" function.

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Figure 18-8

Dressing during machining using a dressing roller

The function supports the following methods of writing the tool offset:

● Continuous write, non-modal (PUTFTOCF (Page 881))

With PUTFTOCF, dressing is carried out at the same time as machining.

The tool offset is changed continuously in the machining channel according to a polynomial

function of the first, second or third order, which must have been defined previously with

FCTDEF (Page 880).

PUTFTOCF is always non-modal; in other words, it takes effect in the subsequent traversing

block.

● Continuous write, modal: ID=1 DO FTOC (for further information, see Function Manual

Synchronized Actions)

● Discrete write (PUTFTOC (Page 882))

With PUTFTOC, dressing is not carried out at the same time as machining from a parallel

channel. The correction value specified with PUTFTOC takes effect immediately in the

destination channel.

Activation / deactivation

The online tool offset in the part program is activated/deactivated by means of the G command

FTOCON/FTOCOF (Page 883).

Extended Functions

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18.2 Online tool offset

Additional properties

● An online tool offset can be activated for every grinding tool (tool type: 400 to 499) in each

channel.

● The online tool offset is generally applied as a length compensation. Like geometry and

wear data, lengths are assigned to geometry axes on the basis of the current plane as a

function of the tool type.

● The grinding spindle monitoring function remains active when an online tool offset is

selected.

Note

The online tool offset may only be used for grinding tools.

The offset always corrects the wear parameters of the selected length. If the length

compensation is identical for several cutting edges, then a chaining specification must be used

to ensure that the values for the 2nd cutting edge are automatically corrected as well.

If online tool offset is active in the machining channel, then the wear values for the active tool

in this channel may not be changed from the machining program or via operator inputs.

Modifications to the radius wear (P15) are not taken into account until the tool is reselected.

The online tool offset is also applied to the constant grinding wheel peripheral speed (GWPS),

i.e. the spindle speed is corrected by the corresponding value.

18.2.2

Commissioning

Number of tool holders that can be defined

Function "Online tool offset" cannot be simultaneously used with the function “Orientable

toolholder".

When using the "Online tool offset" function, the maximum number of tool holders that can be

defined in the TO area should be set to "0":

MD18075 $MN_MM_NUM_TOOLHOLDERS = 0

Note

For SINUMERIK 828D, the value of MD18075 can only be set in "Grinding" technology.

Enable online tool radius compensation

Online tool radius compensation (Page 887) must also be additionally enabled using machine

data:

MD20254 $MC_ONLINE_CUTCOM_ENABLE = 1

Extended Functions

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18.2 Online tool offset

18.2.3

Programming

18.2.3.1

Defining a polynomial function (FCTDEF)

Certain dressing strategies (e.g. dressing roller) are characterized by the fact that the grinding

wheel radius is continuously (linearly) reduced as the dressing roller is fed in. This strategy

requires a linear function between infeed of the dressing roller and writing the wear value of

each length. The linear function is defined using the predefined procedure FCTDEF(...) for up

to third order polynomial functions.

Straight line equation

y = f(x) = a₀ + a₁*x₁

a₁: Gradient of the straight line, with a₁= Δx / Δy

a₀: Shift of the straight line along the X axis with a₀ = -a1 * X_V

˂\

˂[

;

;₉

Syntax

FCTDEF(<Func>,<LLimit>,<ULimit>,<a0>,<a1>,<a2>,<a3>)

Meaning

FCTDEF(...):

Defining a polynomial function for PUTFTOCF(...):

y = f(x) = a₀ + a₁*x + a₂*x² + a₃*x³

<Func>:

Function number

Data type:

INT

Range of values:

1, 2, 3

<LLimit>:

Lower limit value

Data type:

REAL

<ULimit>:

Upper limit value

Data type:

REAL

<a0>,<a1>,<a2>,<a3>:

Coefficients of polynomial function

Data type:

REAL

Extended Functions

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18.2 Online tool offset

Example

Definitions

● Function number: 1

● Lower and upper limit value: -100, 100

● Gradient of the characteristic: a₁ = 1

● The operating point should be located at the center of the characteristic. Based on the

setpoint position of axis XA in the WCS at the instant that the function is defined in the NC

program, the characteristic must be shifted in the negative Y direction: a₀ = -a₁ * XA_D = -1

* $AA_IW

● a₂ = a₃ = 0

Characteristic

;$_'

Upper limit value

Lower limit value

XA_D

Setpoint of axis XA at the time that the function is defined in the NC program

Programming

Program code

Comment

FCTDEF(1,-100,100,-$AA_IW[XA],1)

; Function definition

18.2.3.2

Write online tool offset continuously (PUTFTOCF)

Using the predefined procedure PUTFTOCF(...), an online tool offset is executed based on a

polynomial function previously defined with FCTDEF(...) (Page 880).

Note

The online tool offset can also be realized using a synchronized action.

For further information, see Function Manual Synchronized Actions.

Extended Functions

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18.2 Online tool offset

Syntax

PUTFTOCF(<Func>,<RefVal>,<ToolPar>,<Chan>,<Sp>)

Meaning

PUTFTOCF(...):

Write online tool offset, continuously block-by-block using the polynomial function

defined with FCTDEF(...)

<Func>:

Function number, defined in the function definition with FCTDEF(...)

Data type:

INT

Range of val-

1, 2, 3

ues:

<RefVal>:

Reference value, from which the offset is to be derived (e.g. setpoint of an axis).

Data type:

VAR REAL

<ToolPar>:

Number of the wear parameter (length 1, 2 or 3) in which the offset value is to be

included.

Data type:

INT

<Chan>:

Number of the channel in which the online tool offset is to take effect.

Note:

Only required if the offset is not to take effect in the active channel.

Data type:

INT

<Sp>:

Number of the spindle for which the online tool offset is to take effect.

Note:

Only required if the offset is to be applied to a non-active grinding wheel rather

than the active tool that is currently in use.

Data type:

INT

18.2.3.3

Write online tool offset, discrete (PUTFTOC)

Function

Using the predefined procedurePUTFTOC(...), an online tool offset is executed based on a

fixed offset value.

Syntax

PUTFTOC(<CorrVal>,<ToolPar>,<Chan>,<Sp>)

Meaning

PUTFTOC(...):

Write online tool offset

<CorrVal>:

Offset value, which is added to the wear parameter.

Data type:

REAL

<ToolPar>:

Number of the wear parameter (length 1, 2 or 3) in which the offset value is to be

included.

Data type:

INT

Extended Functions

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18.2 Online tool offset

<Chan>:

Number of the channel in which the online tool offset is to take effect.

Note:

Only required if the offset is not to take effect in the active channel.

Data type:

INT

<Sp>:

Number of the spindle for which the online tool offset is to take effect.

Note:

Only required if the offset is to be applied to a non-active grinding wheel rather

than the active tool that is currently in use.

Data type:

INT

18.2.3.4

Activate/deactivate online tool offset (FTOCON/FTOCOF)

The online tool offset is activated or deactivated using the G commands FTOCON and

FTOCOF.

Syntax

FTOCON

FTOCOF

Meaning

FTOCON:

Activate online tool offset

The command must be programmed in the channel in which the online tool offset

is to be activated.

FTOCOF:

Deactivate online tool offset

The command must be programmed in the channel in which the online tool offset

is to be deactivated.

Note:

On FTOCOF, the axis does not move further out for the tool offset. However, the

value calculated with PUTFTOC/PUTFTOCF remains in the cutting-specific offset

data.

To finally deactivate the online tool offset, the tool (T...) must again be selected/

deselected after FTOCOF.

18.2.4

Supplementary conditions

DRF offset

The online tool offset is superimposed on the programmed axis motion, allowing for the defined

limit values (e.g. velocity).

If a DRF offset and online offset are active simultaneously for an axis, the DRF offset is

considered first.

Extended Functions

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18.2 Online tool offset

Acceleration margin

The active online tool offset is traversed through at JOG velocity, allowing for the maximum

acceleration.

In case of FTOCON the following channel-specific machine data is taken into account:

MD20610 $MC_ADD_MOVE_ACCEL_RESERVE

An acceleration margin can thus be reserved for the movement which means that the overlaid

movement can be executed immediately.

Reference point approach

The valid online offset is deleted on reference point approach with G74.

Tool change

In cases where FTOCON has been active since the last tool or cutting edge change,

preprocessing stop with resynchronization is initiated in the control when a tool is changed.

Cutting edge changes can be implemented without preprocessing stop.

Note

Tool changes can be executed in conjunction with the online tool offset through the selection

of T numbers.

Tool changes with M6 cannot be executed in conjunction with the online tool offset function.

Machining plane and transformation

● FTOCON can be used only in conjunction with the "Inclined axis" transformation.

● It is not possible to change transformations or planes (e.g. G17 to G18) when FTOCON is

active, except in the FTOCOF state.

Resets and operating mode changes

● When online offset is active, NC-Stop and program end with M2/M30 are delayed until the

amount of compensation has been traversed.

● The online tool offset is immediately deselected in response to NC-Reset.

● Online tool offsets can be activated in AUTOMATIC mode and when the program is active.

Extended Functions

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18.2 Online tool offset

18.2.5

Examples

18.2.5.1

Example: Write online tool offset continuously

;

① Grinding disk

② Dressing roller

Oscillating axis

Infeed axis: Grinding disk

Table axis

Infeed axis: Dressing roller

Figure 18-9

Surface grinding machine

Specifications

● Tool offset

- Machining plane: Y/Z plane (G19)

- Tool type: 401 (length 1 acts in Z, length 2 acts in Y)

● Channel 1: Machining channel, axes X, Y, Z

● Channel 2: Dressing channel, axis V

After the grinding operation has started at Y100, the grinding wheel must be dressed by 0.05

(in V direction). The dressing amount must be compensated continuously by means of an

online offset.

Extended Functions

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18.2 Online tool offset

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Figure 18-10

Tool offset

Program (section) for channel 1: Machining channel

Program code

Comment

G1 G18 F10 G90

; initial setting

T1 D1

; select actual tool

S100 M3 X100

; switch-on spindle, X axis to initial po-

sition

INIT (2, "/_N_MPF_DIR/_N_ABRICHT_MPF",

; select: program "DRESS" in channel 2:

"S")

START (2)

; start: Channel 2

X200

; X axis at target position

FTOCON

; activate online offset

Program for channel 2: Dressing channel

The V axis traverses parallel to the Y axis, i.e. length 3 of the tool offset acts in the direction

of the Y axis, and must therefore be compensated..

Program code

Comment

PROC ABRICHT

FCTDEF(1, -1000, 1000, -$AA_IW[V], 1)

; function definition

PUTFTOCF(1, $AA_IW[V], 3, 1)

; continuously write online tool offset:

;

- Function number: 1

;

- Reference value: Setpoint position

in the WCS of the V axis

;

- Tool parameters: Length 3 of the

grinding disk

;

- Channel: 1

;

- Spindle: active grinding disk

Extended Functions

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18.3 Online tool radius compensation

Program code

Comment

V-0.05 G1 F0.01 G91

; infeed motion of the V axis for dressing

M30

18.3

Online tool radius compensation

Function

When the longitudinal axis of the tool and the contour are perpendicular to each other, the

offset can be applied as a length compensation to one of the three geometry axes (online tool

length compensation).

If this condition is not fulfilled, then the offset quantity can be entered as a real radius

compensation value (online tool radius compensation).

Enable

Online tool radius compensation must be enabled using machine data:

MD20254 $MC_ONLINE_CUTCOM_ENABLE = 1

Activation / deactivation

An online tool radius compensation is activated and deactivated using G commands FTOCON

and FTOCOF (Page 883) (in the same way as an online tool length compensation).

Parameter assignment

Online tool offset is parameterized using PUTFTOCF (Page 881) or PUTFTOC (Page 882).

The parameter <ToolPar> (wear parameter in which the correction value is to be calculated)

must be set for the online tool radius compensation as follows:

<ToolPar> = 4

Extended Functions

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18.4 Grinding-specific tool monitoring

Boundary conditions

● A tool radius compensation, and thus also an online tool radius compensation, can be

activated only when the selected tool has a radius other than "0". This means that machining

operations cannot be implemented solely with a tool radius compensation.

● The online correction values should be low in comparison to the original radius to prevent

the permitted dynamic tolerance range from being exceeded when the offset is overlaid on

the axis movement.

● For grinding and turning tools (types 400 - 599), the correction value is applied as a function

of the cutting edge position, i.e. it acts as a radius compensation when tool radius

compensation is active and as a length compensation when tool radius compensation is

deactivated in the axes specified by the cutting edge position.

On all other tool types, the correction value is applied only when tool radius compensation

has been activated with G41 or G42. The correction value is canceled when tool radius

compensation is deactivated with G40.

18.4

Grinding-specific tool monitoring

18.4.1

Function

Grinding-specific tool monitoring is a combination of geometry and speed monitoring. It can

be activated for every grinding tool (tool type: 400 to 499).

Note

Monitoring of one tool is not deselected if the monitoring function is selected for another tool

provided the two tools are referred to different spindles.

One tool and thus also one tool monitor can be active for every spindle at any point in time.

Activated monitors remain active after a reset.

Geometry monitoring

The actual wheel radius and the actual wheel width are monitored.

The compensation value of the first cutting edge (D1) of a grinding tool which is referenced in

the parameter $TC_TPG9 is used as the current wheel radius. If monitoring is active, this value

is compared to the value in parameter $TC_TPG3 (minimum wheel radius).

Note

The monitoring function for the wheel radius remains active if an online tool offset is selected:

● when the monitoring function is activated

● when the current radius (online tool offset, wear parameter) or the current width

($TC_TPG5) is altered

Extended Functions

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18.4 Grinding-specific tool monitoring

The current wheel width is usually determined through the dressing cycle and can be entered

in parameter $TC_TPG5 of a grinding tool. If monitoring is active, this entered value is

compared to the value in parameter $TC_TPG4 (minimum wheel width).

If the current wheel radius falls below the value specified in the parameter $TC_TPG3 or the

current wheel width ($TC_TPG5) falls below the value defined in the parameter $TC_TPG4,

the control sets the following NC/PLC interface signal to "1":

DB31, ... DBX83.3 (geometry monitoring) == 1

Note

There is no controller-internal error response.

Speed monitoring

The speed monitor checks the grinding wheel peripheral speed in m/s (parameter $TC_TPG7)

as well as the maximum spindle speed in rpm (parameter $TC_TPG6).

The speed setpoint is monitored against the speed limitation cyclically with allowance for the

spindle override.

The speed limit is the smaller value resulting from the comparison of the maximum spindle

speed with the speed calculated from the maximum wheel peripheral speed and the current

wheel radius.

The speed limit value is recalculated:

● if monitoring is switched on

● if online correction values (wear parameters) are changed

When the speed limit value is reached, it is restricted to the speed limit value and the following

NC/PLC interface signal is set to "1":

DB31, ... DBX83.6 (speed monitoring) == 1

Note

There is no controller-internal error response.

Activation / deactivation

Activation/deactivation of grinding-specific tool monitoring is done by programming of

TMON(...)/TMOF(...) (Page 890) in the part program.

Extended Functions

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18.4 Grinding-specific tool monitoring

18.4.2

Commissioning

Automatic activation

If, when selecting the tool length compensation of a grinding tool with an odd tool type number,

the grinding-specific tool monitoring is to be automatically activated, the following machine

data must be set to "1":

MD20350 $MC_TOOL_GRIND_AUTO_TMON (activation of tool monitoring) = 1

18.4.3

Programming

18.4.3.1

Activate/deactivate grinding-specific tool monitoring (TMON, TMOF)

With the predefined procedures TMON(...) and TMOF(...), the grinding-specific tool monitoring

is activated or deactivated (geometry and speed monitoring).

Requirement

The tool-specific parameters $TC_TPG1 to $TC_TPG9 must be set.

Syntax

TMON(<TNo>)

TMOF(<TNo>)

Meaning

TMON(...):

Activate grinding-specific tool monitoring

The command must be programmed in the channel in which the grinding-specific tool

monitoring is to be activated.

TMOF(...):

Deactivate grinding-specific tool monitoring

The command must be programmed in the channel in which the grinding-specific tool

monitoring is to be deactivated.

<TNo>:

T number

Note:

Only required if the monitoring is to be switched on or off for an inactive grinding wheel

rather than the active grinding wheel that is currently in use.

TMOF(0):

Deactivate monitoring for all tools

Extended Functions

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18.5 Constant grinding wheel peripheral speed (GWPS).

18.5

Constant grinding wheel peripheral speed (GWPS).

18.5.1

Function

For grinding wheels, generally the wheel peripheral speed is used instead of the spindle speed.

The value to be set is determined by technological process parameters (e.g. grinding wheel

characteristic, material combination).

To be able to specify the wheel peripheral speed in the part program, the tool-specific

parameters $TC_TPG1 (Page 870), $TC_TPG8 (Page 872) and $TC_TPG9 (Page 873) must

be set and the function "Constant grinding wheel peripheral speed (GWPS)" must be activated.

Note

Activation of GWPS does not cause the automatic activation of tool length compensation or

grinding-specific tool monitoring!

As soon as the function is active, any subsequent S value for the spindle that is assigned to

the grinding wheel via $TC_TPG1 will be interpreted as grinding wheel peripheral speed. The

grinding wheel speed is set such that, taking account of the current wheel radius, the grinding

wheel peripheral speed remains constant.

The formula for calculating the speed is as follows:

68* >P V @

Q>PLQ @

5>P@

The correction value to be used for calculation is defined in the tool-specific parameter

$TC_TPG9. The associated wear and the base dimension as a function of the tool type are

added to this correction value. The sum total is divided by "cos" ($TC_TPG8) when the value

of parameter $TC_TPG8 (angle of inclined wheel) is positive, and is divided by "sin"

($TC_TPG8) when the value is negative.

The speed is recalculated in response to the following events:

● Specification a new grinding wheel peripheral speed, e.g. by:

- programming in the part program/overstoring

- assignment to the address "S" in MDI

- spindle speed control via PLC (FC18).

● Changing the online correction values (wear parameters)

Activation / deactivation

Activation/deactivation of GWPS is implemented by programming GWPSON(...)/GWPSOF(...)

in the part program (see "Programming (Page 893)").

Extended Functions

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18.5 Constant grinding wheel peripheral speed (GWPS).

Status

The following interface signal can be used to determine whether or not the GWPS is active:

DB31, ... DBX84.1 (GWPS active)

New tool

If GWPS is to be selected with a new tool for a spindle for which GWPS is already active, the

active GWPS must first be deselected (otherwise an alarm is output).

Response to reset/part program end

In the basic setting, GWPS is deactivated for a reset or end of part program and the spindle

is stopped. The machine data settings behind this behavior can be changed as needed (see

"Commissioning (Page 892)").

Additional properties

● GWPS can be activated for every grinding tool (tool type: 400 to 499) in each channel.

● GWPS can be active simultaneously for several spindles, each with a different grinding

tool, in the same channel.

18.5.2

Commissioning

Automatic activation

If the constant grinding wheel peripheral speed (GWPS) is to be automatically selected for a

spindle after Power On, and remain selected during mode switch, reset or end of the part

program, the following machine data bit must be set to "1":

MD35032 $MA_SPIND_FUNC_RESET_MODE Bit 0 = 1

Note

The prerequisite is that the tool be a grinding tool (tool type 400 to 499), the tool-specific

parameters $TC_TPG1, $TC_TPG8 and $TC_TPG9 are set, and $TC_TPG1 refers to a valid

spindle.

Behavior of spindle after reset/part program end

If the spindle is not to stop after a reset or end of part program, but is to continue rotating at

the current speed, the following machine data must be set to "1":

Extended Functions

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18.5 Constant grinding wheel peripheral speed (GWPS).

MD35040 $MA_SPIND_ACTIVE_AFTER_RESET = 1

Note

MD35040 only takes effect in the spindle mode open-loop control operation.

18.5.3

Programming

18.5.3.1

Switching constant grinding wheel peripheral speed (GWPSON, GWPSOF) on/off:

With the predefined procedures GWPSON(...) and GWPSOF(...), the constant grinding wheel

peripheral speed (GWPS) for grinding tools (tool type: 400 to 499) is switched on and off.

Syntax

GWPSON(<TNo>)

S<n>=... :

GWPSOF(<TNo>)

Meaning

GWPSON(...):

Switch on the constant grinding wheel peripheral speed

GWPSOF(...):

Switch off the constant grinding wheel peripheral speed

<TNo>:

T number

Note:

Only required if the constant grinding wheel peripheral speed is to be switch-

ed on or off for an inactive grinding wheel rather than the active grinding

wheel that is currently in use.

S<n>=…:

Grinding wheel peripheral speed in m/s or ft/s for spindle <n>

S0=... or S... :

Grinding wheel peripheral speed for the master spindle

Query status

The following system variable can be used to query from the part program whether the constant

grinding wheel peripheral speed is active for a specific spindle.

$P_GWPS[<n>] ; where <n> = spindle number

Value

Meaning

0 (= FALSE)

GWPS is inactive.

1 (= TRUE)

GWPS is active.

Extended Functions

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18.5 Constant grinding wheel peripheral speed (GWPS).

18.5.4

Example

A constant grinding wheel peripheral speed is to be used for grinding tools T1 and T5. T1 is

the active tool.

Data of tool T1 (peripheral grinding wheel)

$TC_DP1[1,1] = 403

;tool type

$TC_DP3[1,1] = 300

;length1

$TC_DP4[1,1] = 50

;length2

$TC_DP12[1,1] = 0

;wear length 1

$TC_DP13[1.1] =0

;wear length 2

$TC_DP21[1.1] =300

;base length 1

$TC_DP22[1.1] =400

;base length 2

$TC_TPG1[1] = 1

;spindle number

$TC_TPG8[1] = 0

;angle of inclined wheel

$TC_TPG9[1] = 3

;parameter no. for radius calculation

Data of tool T5 (inclined grinding wheel)

$TC_DP1[5,1] = 401

;tool type

$TC_DP3[5,1] = 120

;length1

$TC_DP4[5,1] = 30

;length2

$TC_DP12[5,1] = 0

;wear length 1

$TC_DP13[5,1] =0

;wear length 2

$TC_DP21[5,1] =100

;base length 1

$TC_DP22[5,1] =150

;base length 2

$TC_TPG1[5] = 2

;spindle number

$TC_TPG8[5] = 45

;angle of inclined wheel

$TC_TPG9[5] = 3

;parameter no. for radius calculation

Programming

Program code

Comment

N20 T1 D1

; select T1 and D1

N25 S1=1000 M1=3

; 1000 rpm for spindle 1

N30 S2=1500 M2=3

; 1500 rpm for spindle 2

N40 GWPSON

; activate GWPS for active tool T1

N45 S[$P_ATPG[1]]=60

; set GWPS for active tool to 60 m/s

→ n=1909.85 rpm

N50 GWPSON(5)

; activate GWPS for tool 5 (spindle 2)

N55 S[$TC_TPG1[5]]=40

; set GWPS for spindle 2 to 40 m/s

→ n=1909.85 rpm

N60 GWPSOF

; deactivate GWPS for active tool

Extended Functions

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18.6 Data lists

Program code

Comment

N65 GWPSOF(5)

; deactivate GWPS for tool 5 (spindle 2)

SINUMERIK 840D sl. Service - Functions. Manual (2018-2020) - page 43