FANUC Series 30i/300i/300is-MODEL A. Machining Center System. User's manual - page 129

1.GENERAL

OPERATION

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1.4

TESTING A PROGRAM

Before machining is started, the automatic running check can be
executed.
It checks whether the created program can operate the machine as
desired.
This check can be accomplished by running the machine actually or
viewing the position display change (without running the machine)
(See Section III-5).

1.4.1

Check by Running the Machine

Explanation
- Dry run

Remove the workpiece, check only movement of the tool. Select the
tool movement rate using the dial on the operator's panel. (See Section
III-5.4)

Tool

Table

Fig. 1.4.1 (a) Dry run

- Feedrate override

Check the program by changing the feedrate specified in the program.
(See Section III-5.2)

Tool

Feedrate specified by program :
100 mm/min.

Feedrate after feed rate
override (20%) : 20 mm/min.

Workpiece

Fig. 1.4.1 (b) Feedrate override

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- Single block

When the cycle start pushbutton is pressed, the tool executes one
operation then stops. By pressing the cycle start again, the tool
executes the next operation then stops. The program is checked in this
manner. (See Section III-5.5)

Tool

Cycle start

Stop

Workpiece

Cycle
start

Fig. 1.4.1 (c) Single Block

1.4.2

How to View the Position Display Change without Running

the Machine

Explanation
- Machine Lock

MDI

Tool

The tool remains stopped, and only the
positional displays of the axes change.

Workpiece

Fig. 1.4.2 (a) Machine Lock

- Auxiliary function lock

When automatic running is placed into the auxiliary function lock
mode during the machine lock mode (See Sections III-5.1), all
auxiliary functions (spindle rotation, tool replacement, coolant on/off,
etc.) (See Section III-5.1) are disabled.

1.GENERAL

OPERATION

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1.5

EDITING A PROGRAM

After a created program is once registered in memory, it can be
corrected or modified from the MDI panel (See Section III-10).
This operation can be executed using the program edit function.

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1.6

DISPLAYING AND SETTING DATA

The operator can display or change a value stored in CNC internal
memory by key operation on the MDI screen (See III-12).

Data setting

Data display

Screen Keys

MDI

CNC memory

Fig. 1.6 (a) Displaying and setting data

Explanation
- Offset value

Setting

Display

Screen Keys

MDI

Geometry

Wear

compensation compensation

Tool compensation number 1 12.3

25.0

Tool compensation number 2 20.0

40.0

Tool compensation number 3

CNC memory

Fig. 1.6 (b) Displaying and Setting Offset Values

The tool has the tool dimension (length, diameter). When a workpiece
is machined, the tool movement value depends on the tool dimensions.
By setting tool dimension data in CNC memory beforehand, CNC
automatically generates tool routes that permit any tool to cut the
workpiece specified by the program. Tool dimension data is called the
offset value.

1.GENERAL

OPERATION

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Machined
shape

2nd tool path

1st tool path

Offset value of the 1st tool

Offset value of the 2nd tool

Fig. 1.6 (c) Offset value

- Displaying and setting operator's setting data

Apart from parameters, there is data that is set by the operator in
operation. This data causes machine characteristics to change.
For example, the following data can be set:

•

Inch/Metric

switching

•

Selection of I/O devices

•

Mirror image cutting on/off

The above data is called setting data (See Section III-12.3.1).

Setting

Screen Keys

MDI

Displaying

CNC Memory

Program

Automatic
operation

Movement of
the machine

Operational
characteristics

Setting data

Inch/Metric switching

Ì Ý

Selection of I/O device
Mirror image ON/OFF setting

Fig. 1.6 (d) Displaying and setting operator's setting data

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- Displaying and setting parameters

The CNC functions have versatility in order to take action in
characteristics of various machines.
For example, CNC can specify the following:
-

Rapid traverse rate of each axis

Whether increment system is based on metric system or inch
system.

How to set command multiply/detect multiply (CMR/DMR)

Data to make the above specification is called parameters (See Section
III-12.4.1).
Parameters differ depending on machine tool.

Setting

Screen Keys

MDI

Display

CNC memory

Parameter
Rapid traverse rate
Position control
Reference position return
Backlash compensation data
Pitch error compensation data

Program

Automatic
operation

Movement of
the machine

Operational
characteristics

Fig. 1.6 (e) Displaying and setting parameters

- Data protection key

A key called the data protection key can be defined. It is used to
prevent part programs, offset values, parameters, and setting data from
being registered, modified, or deleted erroneously (See Section
III-12).

Program
Offset value
Parameters
Setting data

Data Setting

Machine
operator's panel

Screen Keys

Data protection key

MDI

Signal

Data protection key

Registration / modification inhibition

CNC memory

Fig. 1.6 (f) Data protection key

1.GENERAL

OPERATION

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1.7

DISPLAY

1.7.1

Program Display

The contents of the currently active program are displayed.
(See Section III-12.2.1)

Fig. 1.7.1 (a)

A list of the programs held in the currently selected folder is
displayed.

Fig. 1.7.1 (b)

Running sequence number

The line currently being executed
is indicated by the cursor.

Contents of program

Running program number

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1.7.2

Current Position Display

The current position of the tool is displayed with the coordinate
values.
Moreover, the distance from the current position to a target point can
be displayed as a remaining travel distance.
(See Section III-12.1.1, 12.1.2, 12.1.3.)

Workpiece coordinate
system

Fig. 1.7.2 (a)

Fig. 1.7.2 (b)

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