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FANUC Series 0i-MODEL D, Series 0i Mate-MODEL D. For Lathe System USER’S MANUAL - page 6

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

4.5.2

Traverse Direct Constant-Size Grinding Cycle (G72)

A traverse direct constant-size grinding cycle can be executed.

Format

G72 P_ A_ B_ W_ U_ I_ K_ H_ ;

P_ : Gage number (1 to 4)

A_ : First depth of cut (The cutting direction depends on the sign.)

B_ : Second depth of cut (The cutting direction depends on the sign.)

W_ : Grinding range (The grinding direction depends on the sign.)

U_ : Dwell time

I_

: Feedrate for A and B

K_ : Feedrate for W

H_ : Repetitive count (from 1 to 9999)

G72

X

W

A

<1>(I)

<3>(K)

<2>U

<4>(I)

B

<6>(K)

<5>U

α

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Explanation

If the multi-step skip option is specified, a gage number can be

specified. The method of gage number specification is the same as for

the multi-step skip option. If the multi-step skip option is not specified,

the conventional skip signal is used.

The commands and operations other than gage number specification

are the same as for G71.

- Operation performed when the skip signal is input

A G72 cycle can be terminated after interrupting the current operation

(or after ending the current operation) by inputting the skip signal

during execution of the cycle.

Each operation of the sequence performed when the skip signal is

input is described below.

•

If the skip signal is input during operation

<1> or

<4>

(movement by A or B), cutting is immediately stopped to return

to coordinate α selected as the cycle start point.

Skip signal

Skip signal

(End)

(End)

•

If the skip signal is input during operation <2> or <5> (dwell),

dwell operation is immediately stopped to return to coordinate α

selected as the cycle start point.

•

If the skip signal is input during operation <3> or <6> (grinding

feed), the tool returns to coordinate α selected as the cycle start

point after the end of movement over W.

Skip signal

(End)

Skip signal

(End)

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.5.3

Oscillation Grinding Cycle (G73)

An oscillation grinding cycle can be executed.

Format

G73 A_ (B_) W_ U_ K_ H_ ;

A_ : First depth of cut (The cutting direction depends on the sign.)

B_ : Second depth of cut (The cutting direction depends on the sign.)

W_ : Grinding range (The grinding direction depends on the sign.)

U_ : Dwell time

K_ : Feedrate for W

H_ : Repetitive count (from 1 to 9999)

G73

X

W

<1>U

<2>(K)

A

<3>U

A(B)

<4>(K)

α

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

4.5.4

Oscillation Direct Constant-Size Grinding Cycle (G74)

An oscillation direct constant-size grinding cycle can be executed.

Format

G74 P_ A_ (B_) W_ U_ K_ H_ ;

P_ : Gage number (1 to 4)

A_ : First depth of cut (The cutting direction depends on the sign.)

B_ : Second depth of cut (The cutting direction depends on the sign.)

W_ : Grinding range (The grinding direction depends on the sign.)

U_ : Dwell time

K_ : Feedrate for W

H_ : Repetitive count (from 1 to 9999)

G74

X

W

<1>U

<2>(K)

A

A(B)

<3>U

<4>(K)

α

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Explanation

If the multi-step skip option is specified, a gage number can be

specified. The method of gage number specification is the same as for

the multi-step skip option. If the multi-step skip option is not specified,

the conventional skip signal is used.

The commands and operations other than gage number specification

are the same as for G73.

- Operation performed when the skip signal is input

A G74 cycle can be terminated after interrupting the current operation

(or after ending the current operation) by inputting the skip signal

during execution of the cycle.

Each operation of the sequence performed when the skip signal is

input is described below.

•

If the skip signal is input during operation <1> or <3> (dwell),

dwell operation is immediately stopped to return to coordinate α

selected as the cycle start point.

•

If the skip signal is input during operation <2> or <4> (A, B,

grinding feed), the tool returns to coordinate α selected as the

cycle start point after the end of movement over W.

Skip signal

Skip signal

(End)

(End)

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.6

CHAMFERING AND CORNER R

Overview

A chamfering or corner R block can automatically be inserted between

linear interpolation (G01) along a single axis and that along a single

axis normal to that single axis.

Chamfering or corner R is inserted for a command to move the tool

along two axes on the plane determined by the plane selection (G17,

G18, or G19) command.

NOTE

To enable the chamfering and corner R function,

bit 2 (CCR) of parameter No. 8134 to 1.

Format

- Chamfering

First axis on the selected plane → second axis on the selected plane

(G17 plane: X_P → Y_P, G18 plane: Z_P → X_P, G19 plane: Y_P → Z_P)

Format

G17 plane: G01 X_P(U)_ J(C)±j ;

G18 plane: G01 Z_P(W)_ I(C)±i ;

G19 plane: G01 Y_P(V)_ K(C)±k ;

Explanation

Tool movement

X_P(U)__

Specifies movement from

Y_P(V)__

point a to point b with an

Z_P(W)__

absolute or incremental

programming in the figure

on the right.

Positive direction along

XP is the address of the

the second axis on the

selected plane

c

X-axis of the three basic

axes or an axis parallel to

i, j, k

a

d

the X-axis. Y_P is the

45°

b

45°

address of the Y-axis of the

Start point

i, j, k

three basic axes or an axis

Negative direction

c

parallel to the Y-axis. Z_P is

along the second axis

the address of the Z-axis of

on the selected plane

the three basic axes or an

axis parallel to the Z-axis.

Moves from a to d and c.

I(C)±i

Specify the distance

(Positive direction along the second

J(C)±j

between points b and c in

axis on the selected plane when a

K(C)±k

the figure shown at right

plus sign is specified at I, J, K, or C

with a sign following

or negative direction when a minus

address I, J, K, or C. (Use

sign is specified at I, J, K, or C)

I, J, or K when bit 4 (CCR)

of parameter No. 3405 is

set to 0 or C when the bit is

set to 1.)

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Chamfering

Second axis on the selected plane → first axis on the selected plane

(G17 plane: Y_P → X_P, G18 plane: X_P → Z_P, G19 plane: Z_P → Y_P)

Format

G17 plane: G01 Y_P(V)_ I(C)±i ;

G18 plane: G01 X_P(U)_ K(C)±k ;

G19 plane: G01 Z_P(W)_ J(C)±j ;

Explanation

Tool movement

X_P(U)__

Specifies movement from

Y_P(V)__

point a to point b with an

Z_P(W)__

absolute or incremental

Moves from a to d and c.

programming in the figure

(Positive direction along the first axis

on the right.

on the selected plane when a plus

XP is the address of the

sign is specified at I, J, K, or C or

X-axis of the three basic

negative direction when a minus

axes or an axis parallel to

sign is specified at I, J, K, or C)

the X-axis. Y_P is the

address of the Y-axis of the

a

Start point

three basic axes or an axis

parallel to the Y-axis. Z_P is

the address of the Z-axis of

the three basic axes or an

axis parallel to the Z-axis.

d

I(C)±i

Specify the distance

J(C)±j

between points b and c in

45°

45°

K(C)±k

the figure shown at right

b

First axis on

with a sign following

First axis on

c

c

the selected

i, j, k

i, j, k

the selected

address I, J, K, or C. (Use

plane

plane

I, J, or K when bit 4 (CCR)

of parameter No. 3405 is

set to 0 or C when the bit is

set to 1.)

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

- Corner R

First axis on the selected plane → second axis on the selected plane

(G17 plane: X_P → Y_P, G18 plane: Z_P → X_P, G19 plane: Y_P → Z_P)

Format

G17 plane: G01 X_P(U)_ R±r ;

G18 plane: G01 Z_P(W)_ R±r ;

G19 plane: G01 Y_P(V)_ R±r ;

Explanation

Tool movement

X_P(U)__

Specifies movement from

Y_P(V)__

point a to point b with an

Z_P(W)__

absolute or incremental

Positive direction along

programming in the figure

the second axis on the

selected plane

c

on the right.

r

XP is the address of the

a

d

X-axis of the three basic

b

axes or an axis parallel to

Start point

the X-axis. Y_P is the

address of the Y-axis of the

r

c

three basic axes or an axis

Negative direction along

the second axis on the

parallel to the Y-axis. Z_P is

selected plane

the address of the Z-axis of

the three basic axes or an

Moves from a to d and c.

axis parallel to the Z-axis.

(Positive direction along the second

R±r

Specify the radius of the

axis on the selected plane when +r

arc connecting points d

is specified at R or negative

and c in the figure shown

direction when -r is specified at R)

at right with a sign following

address R.

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Corner R

Second axis on the selected plane → first axis on the selected plane

(G17 plane: Y_P → X_P, G18 plane: X_P → Z_P, G19 plane: Z_P → Y_P)

Format

G17 plane: G01 Y_P(V)_ R±r ;

G18 plane: G01 X_P(U)_ R±r ;

G19 plane: G01 Z_P(W)_ R±r ;

Explanation

Tool movement

X_P(U)__

Specifies movement from

Y_P(V)__

point a to point b with an

Z_P(W)__

absolute or incremental

Moves from a to d and c.

programming in the figure

(Positive direction along the first axis

on the right.

on the selected plane when +r is

specified at R or negative direction

XP is the address of the

X-axis of the three basic

when -r is specified at R)

axes or an axis parallel to

a Start point

the X-axis. Y_P is the

address of the Y-axis of the

three basic axes or an axis

parallel to the Y-axis. Z_P is

the address of the Z-axis of

d

r

r

the three basic axes or an

axis parallel to the Z-axis.

R±r

Specify the radius of the

First axis on

c

b

c

First axis on

the selected

the selected

arc connecting points d

plane

plane

and c in the figure shown

at right with a sign following

address R.

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Explanation

By G01 specified for chamfering or corner R, the tool must be moved

only along one of the two axes on the selected plane. The command in

the next block must move the tool only along the other axis on the

selected plane.

Example:

When the A-axis is set as an axis parallel to the basic X-axis (by

setting parameter No.

1022 to

5), the following program

performs chamfering between cutting feed along the A-axis and

that along the Z-axis:

G18 A0 Z0

G00 A100.0 Z100.0

G01 A200.0 F100 K30.0

Z200.0

The following program causes an alarm. (Because chamfering is

specified in the block to move the tool along the X-axis, which is

not on the selected plane)

G18 A0 Z0

G00 A100.0 Z100.0

G01 X200.0 F100 K30.0

Z200.0

The following program also causes an alarm. (Because the block

next to the chamfering command moves the tool along the X-axis,

which is not on the selected plane)

G18 A0 Z0

G00 A100.0 Z100.0

G01 Z200.0 F100 I30.0

X200.0

A radius value is specified at I, J, K, R, and C.

In an incremental programming, use point b in the figure in "Format"

as the start point in the block next to a chamfering or corner R block.

That is, specify the distance from point b. Do not specify the distance

from point c.

Example

X

N001 G18 ;

N002 G00 X268.0 Z530.0 ;

530.0

N003 G01 Z270.0 R6.0 ;

N004 X860.0 K-3.0 ;

270.0

N005 Z0 ;

N004

End point

K3.0

N003

R6

N002

Cutting start point

Z

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

Limitation

- Alarms

In the following cases, an alarm is issued:

1)

Chamfering or corner R is specified in a block for threading

(alarm PS0050).

2)

G01 is not specified in the block next to the G01 block in which

chamfering or corner R is specified (alarm PS0051 or PS0052).

3)

An axis which is not on the selected plane is specified as a move

axis in the block in which chamfering or corner R is specified or

the next block (alarm PS0051 or PS0052).

4)

A plane selection command (G17, G18, or G19) is specified in

the block next to the block in which chamfering or corner R is

specified (alarm PS0051).

5)

When bit 4 (CCR) of parameter No. 3405 is set to 0 (to specify

chamfering at I, J, or K), two or more of I, J, K, and R are

specified in G01 (alarm PS0053).

6)

Chamfering or corner R is specified in the G01 block to move the

tool along more than one axis (alarm PS0054).

7)

The travel distance along an axis specified in the block in which

chamfering or corner R is specified is smaller than the amount of

chamfering or corner R (alarm PS0055). (See the figure below.)

G18

The solid line indicates

G01 W30.0 F100.0 I50.0 ;

the tool path when

G01 U100.0 ;

chamfering is not

performed.

Chamfering block to

be inserted

50.0

x

30.0 (smaller than 50.0)

z

50.0

Fig. 4.6 (a) Example of machining which causes alarm PS0055

8)

An invalid combination of a move axis and I, J, or K is specified

for chamfering (alarm PS0306).

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

9)

An invalid sign is specified at I, J, K, R, or C (chamfering or

corner R in the direction opposite to the movement in the next

block is specified) (alarm PS0051). (See the figure below.)

Chamfering block to

G18

be inserted (positive X

G01 W100.0 F100.0 I50.0 ;

direction)

G01 U-100.0 ;

The solid line indicates the

x

tool path when chamfering

is not performed.

z

(negative X direction)

Fig. 4.6 (b) Example of machining which causes alarm PS0051

- Single block operation

When the block in which chamfering or corner R is specified is

executed in the single block mode, operation continues to the end

point of the inserted chamfering or corner R block and the machine

stops in the feed hold mode at the end point. When bit 0 (SBC) of

parameter No. 5105 is set to 1, the machine stops in the feed hold

mode also at the start point of the inserted chamfering or corner R

block.

- Tool nose radius compensation

When applying tool nose radius compensation, note the following

points:

1.

If the amount of inner chamfering or corner R is too small as

compared with compensation and cutting is generated, alarm

PS0041 is issued. (See the figure below.)

Example of machining which does not

Example of machining which

cause alarm PS0041

causes alarm PS0041

(The solid line indicates the programmed path after chamfering. The

dotted line indicates the tool center path or tool nose radius center path.)

2.

A function is available which intentionally changes the

compensation direction by specifying the I, J, or K command in

the G01 block in the tool nose radius compensation mode (see

the explanations of tool nose radius compensation). To use this

function when the chamfering and corner R function is enabled

(bit 2 (CCR) of parameter No. 8134 is set to 1), set bit 4 (CCR)

of parameter No.

3405 is set to

1 so that the I, J, and K

commands are not used as chamfering commands. Operation to

be performed under each condition is explained below.

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.7

MIRROR IMAGE FOR DOUBLE TURRET (G68, G69)

Overview

When a unit has a double turret consisting of two tool posts which

face each other on the same controlled axis, mirror image can be

applied to the X-axis with a G code command. Symmetrical cutting

can be performed by creating a machining program for the facing tool

posts as if they were in the coordinate system on the same side.

Format

G68 : Double turret mirror image on

G69 : Mirror image cancel

Explanation

Mirror image can be applied to the X-axis of the three basic axes that

is set by parameter No. 1022 with the G code command.

When G68 is designated, the coordinate system is shifted to the

double turret side, and the X-axis sign is reversed from the

programmed command to perform symmetrical cutting. This function

is called the mirror image for double turret.

To use this function, set the distance between the two tool posts to a

parameter No. 1290.

Example

• For turning

X

Offset value of tool

post A

<3>

Tool post A

60

120

<1>

Z

φ80

φ40

180

φ120

<2>

120

Offset value of tool

post B

Tool post B

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

X40.0 Z180.0 T0101 ; Position tool post A at <1>

G68 ;

Shift the coordinate system by the distance A to B

(120mm), and turn mirror image on.

X80.0 Z120.0 T0202 ; Position tool post B at <2>

G69 ;

Shift the coordinate system by the distance B to A,

and cancel mirror image.

X120.0 Z60.0 T0101 ; Position tool post A at <3>

NOTE

A diameter value is specified for the X-axis.

Limitation

NOTE

1 When the G68 command based on this function is

enabled, the X-axis coordinate value that can be

read with the custom macro system variables

#5041 and up or #100101 and up (current specified

position (in the workpiece coordinate system)) is a

position with mirror image applied.

2 This function cannot be used together with the

balanced cutting function (for a 2-path system).

To use this function, set bit 0 (NVC) of parameter

No. 8137 to 1.

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.8

DIRECT DRAWING DIMENSION PROGRAMMING

Overview

Angles of straight lines, chamfering value, corner R values, and other

dimensional values on machining drawings can be programmed by

directly inputting these values. In addition, the chamfering and corner

R can be inserted between straight lines having an optional angle.

This programming is only valid in memory operation mode.

NOTE

To use direct drawing dimension programming

when the chamfering and corner R function is

enabled (bit 2 (CCR) of parameter No. 8134 is set

to 1), set bit 0 (CRD) of parameter No. 3453 to 1.

(With this setting, the chamfering and corner R

function is disabled.)

Format

Examples of command formats for the G18 plane (ZX plane) are

shown. This function can be specified in the following formats also

for the G17 plane (XY plane) and G19 plane (YZ plane).

The following formats are changed as follows:

For the G17 plane: Z → X, X → Y

For the G19 plane: Z → Y, X → Z

Table 4.8 (a) Commands table

Commands

Movement of tool

X

(X2 , Z2)

1

X2_ (Z2_), A_ ;

A

(X1 , Z1)

Z

X

(X3 , Z3)

A2

,A1_ ;

2

X3_ Z3_, A2_ ;

(X2 , Z2)

A1

(X1 , Z1)

Z

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

Commands

Movement of tool

X

(X3 , Z3)

X2_ Z2_, R1_ ;

A2

X3_ Z3_ ;

R1

3

or

A1

,A1_, R1_ ;

(X2 , Z2)

X3_ Z3_, A2_ ;

(X1 , Z1)

Z

X

(X3 , Z3)

X2_ Z2_, C1_ ;

A2

X3_ Z3_ ;

4

or

,A1_, C1_ ;

C1

A1

X3_ Z3_, A2_ ;

(X2 , Z2)

(X1 , Z1)

Z

X

(X4 , Z4)

(X3 , Z3)

X2_ Z2_ , R1_ ;

X3_ Z3_ , R2_ ;

A2

R2

X4_ Z4_ ;

5

or

R1

,A1_, R1_ ;

A1

X3_ Z3_, A2_, R2_ ;

(X2 , Z2)

X4_ Z4_ ;

(X1 , Z1)

Z

X

C2

X2_ Z2_ , C1_ ;

X3_ Z3_ , C2_ ;

(X3 , Z3)

(X4 , Z4)

X4_ Z4_ ;

A2

6

or

,A1_, R1_ ;

(X2 , Z2)

X3_ Z3_, A2_, C2_ ;

A1

X4_ Z4_ ;

C1

(X1 , Z1)

Z

X

C2

X2_ Z2_ , R1_ ;

(X3 , Z3)

X3_ Z3_ , C2_ ;

(X4 , Z4)

A2

X4_ Z4_ ;

7

or

,A1_, R1_ ;

R1

X3_ Z3_, A2_, C2_ ;

A1

(X2 , Z2)

X4_ Z4_ ;

(X1 , Z1)

Z

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Commands

Movement of tool

X

(X4 , Z4)

X2_ Z2_ , C1_ ;

(X3 , Z3)

X3_ Z3_ , R2_ ;

X4_ Z4_ ;

A2

R2

8

or

,A1_, C1_ ;

(X2 , Z2)

X3_ Z3_, A2_, R2_ ;

C1

A1

X4_ Z4_ ;

(X1 , Z1)

Z

Explanation

A program for machining along the curve shown in Fig. 4.8 (a) is as

follows :

+X

X (x2) Z (z2) , C (c1) ;

a3

X (x3) Z (z3) , R (r2) ;

X (x4) Z (z4) ;

(x3, z3)

+Z

(x4, z4)

or

r2

a2

,A (a1) , C (c1) ;

X (x3) Z (z3) , A (a2) , R (r2) ;

X (x4) Z (z4) ;

(x2, z2)

a

1

c1

(x1, z1)

Start

Fig. 4.8 (a) Machining Drawing (example)

For command a straight line, specify one or two out of X, Z, and A.

If only one is specified, the straight line must be primarily defined by

a command in the next block.

To command the degree of a straight line or the value of chamfering

or corner R, command with a comma (,) as follows :

,A_

,C_

,R_

By specifying 1 to bit 4 (CCR) of parameter No.3405 on the system

which does not use A or C as an axis name, the degree of a straight

line or the value of chamfering or corner R can be commanded

without a comma (,) as follows :

A_

C_

R_

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Command using a supplement

When bit 5 (DDP) of parameter No. 3405 is set to 1, an angle can be

specified using a supplement.

There is the following relationship, assuming that the supplement is A'

and the actual specified angle is A:

A = 180 - A'

+X

A

A’

+Z

Fig. 4.8 (b) Supplement

Limitation

NOTE

1

Direct drawing dimension programming commands

are valid only during memory operation.

2

The following G codes are not applicable to the same

block as commanded by direct input of drawing

dimensions or between blocks of direct input of

drawing dimensions which define sequential figures.

(a) G codes other than G04 in group 00

(b) G codes other than G00, G01, and G33 in group

01

(c) G codes in group 10 (canned cycle for drilling)

(d) G codes in group 16 (plane selection)

(e) G22 and G23

3

Corner R cannot be inserted into a threading block.

4

When the chamfering and corner R function is

enabled (bit 2 (CCR) of parameter No. 8134 is set to

1), both functions cannot be used simultaneously.

When bit 0 (CRD) of parameter No. 3453 is set to 1,

direct drawing dimension programming is enabled. (At

this time, chamfering and corner R are disabled.)

5

When the end point of the previous block is

determined in the next block according to sequential

commands of direct drawing dimension programming

during single block operation, the machine does not

stop in the single block stop mode, but stop in the

feed hold stop mode at the end point of the previous

block.

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

NOTE

6

The angle allowance in calculating the point of

intersection in the program below is ±1°.

(Because the travel distance to be obtained in this

calculation is too large.)

(a) X_ ,A_ ; (If a value within 0°±1° or 180°±1° is

specified for the angle instruction A, the alarm

PS0057 occurs.)

(b) Z_ ,A_ ; (If a value within 90°±1° or 270°±1° is

specified for the angle instruction A, the alarm

PS0057 occurs.)

7

An alarm PS0058 occurs if the angle made by the 2

lines is within ±1° when calculating the point of

intersection.

8

Chamfering or corner R is ignored if the angle made

by the 2 lines is within ±1°.

9

Both a dimensional command (absolute

programming) and angle instruction must be specified

in the block following a block in which only the angle

instruction is specified.

(Example)

N1 X_ ,A_ ,R_ ;

N2 ,A_ ;

N3 X_ Z_ ,A_ ;

In addition to the dimensional command, angle

command must be specified in block No. 3. If the

angle command is not specified, alarm PS0056 is

issued. If the coordinates are not specified with an

absolute programming, alarm PS0312 is issued.

10

In the tool nose radius compensation mode, a block in

which only the angle command is specified in direct

drawing dimension programming is assumed to be a

block with no move command. For details of

compensation when sequential blocks with no move

command are specified, see the explanation of tool

nose radius compensation.

11

If two or more blocks with no move command are

specified between sequential commands of direct

drawing dimension programming, alarm PS0312 is

issued.

12

When bit 4 (CCR) of parameter No. 3405 is set to 1,

address A in the G76 (multiple threading cycle) block

specifies the tool nose angle.

When A or C is used as an axis name, it cannot be

used in the angle or chamfering command in direct

drawing dimension programming. Use ,A_ or ,C_

(when bit 4 (CCR) of parameter No. 3405 is set to 0).

- 159 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

NOTE

13 In a multiple repetitive canned cycle, in blocks with

sequence numbers between those specified at P and

Q, a program using direct drawing dimension

programming can be used. The block with the last

sequence number specified at Q must not be an

intermediate block of these specified blocks.

Example

X

R20

R15

R6

Z

10°

1 × 45°

30

180

22°

(Diameter specification, metric input)

N001 G50 X0.0 Z0.0 ;

N002 G01 X60.0 ,A90.0 ,C1.0 F80 ;

N003 Z-30.0 ,A180.0 ,R6.0 ;

N004 X100.0 ,A90.0 ;

N005

,A170.0 ,R20.0 ;

N006

X300.0 Z-180.0 ,A112.0 ,R15.0 ;

N007

Z-230.0 ,A180.0 ;

:

:

- 160 -

5.COMPENSATION FUNCTION

PROGRAMMING

B-64304EN-1/01

5.1

TOOL OFFSET

Tool offset is used to compensate for the difference when the tool

actually used differs from the imagined tool used in programming

(usually, standard tool).

Standard tool

Actual tool

Offset amount

on X axis

Offset amount

on Z axis

Fig. 5.1 (a) Tool offset

5.1.1

Tool Geometry Offset and Tool Wear Offset

Tool geometry offset and tool wear offset are possible to divide the

tool offset to the tool geometry offset for compensating the tool shape

or tool mounting position and the tool wear offset for compensating

the tool nose wear. The tool geometry offset value and tool wear

offset value can be set individually. When these values are not

distinguished from each other, the total of the values is set as the tool

offset value.

Point on the program

Point on the program

Imaginary tool

X axis

geometry

Offset

offset

amount

value

on X axis

X axis

wear

offset

value

Z axis

Z axis

wear

geometry

Offset

offset

offset

amount

value

value

on Z axis

Fig. 5.1.1 (a) If tool geometry offset and tool wear offset are

distinguished from each other (left) and if they are

not (right)

- 162 -

B-64304EN-1/01

PROGRAMMING

5.COMPENSATION FUNCTION

5.1.2

T Code for Tool Offset

Format

Select a tool with a numeric value after a T code. A part of the

numeric value is used as a tool offset number for specifying data such

as a tool offset value. The following selections can be made

according to the specification method and parameter setting:

Meaning of T code (*1)

Parameter setting for specifying of

LGN(No.5002#1)=0

LGN(No.5002#1)=1

offset No. (*2)

T x x x x x x x y

T x x x x x x x y

A tool wear offset number is specified

xxxxxxx : Tool selection

xxxxxxx : Tool selection and tool

using the lower one digit of a T code.

y

: Tool wear and tool

geometry offset

When parameter No. 5028 is set to 1

geometry offset

y

: Tool wear offset

T x x x x x x y y

T x x x x x x y y

A tool wear offset number is specified

xxxxxx

: Tool selection

xxxxxx

: Tool selection and tool

using the lower two digits of a T code.

yy

: Tool wear and tool

geometry offset

When parameter No. 5028 is set to 2

geometry offset

yy

: Tool wear offset

T x x x x x y y y

T x x x x x y y y

A tool wear offset number is specified

xxxxx

: Tool selection

xxxxx

: Tool selection and tool

using the lower three digits of a T code.

yyy

: Tool wear and tool

geometry offset

When parameter No. 5028 is set to 3

geometry offset

yyy

: Tool wear offset

*1 The maximum number of digits of a T code can be specified

using parameter No. 3032.

(1 to 8 digits)

*2 When parameter No. 5028 is set to 0, the number of digits of a T

code used for offset number specification depends on the number

of tool offsets.

Example)

When the number of tool offsets is 1 to 9: Lower one digit

When the number of tool offsets is 10 to 99: Lower two digits

When the number of tool offsets is 100 to 200: Lower three digits

5.1.3

Tool Selection

Tool selection is made by specifying the T code corresponding to the

tool number. Refer to the machine tool builder's manual for the

relationship between the tool selection number and the tool.

5.1.4

Offset Number

Tool offset number has two meanings. It is specifies the offset

distance corresponding to the number that is selected to begin the

offset function. A tool offset number of 0 indicates that the offset

amount is 0 and the offset is cancelled.

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