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FANUC Series 16i/160i/160is-MB, Series 18i/180i/180is-MB5, Series 18i/180i/180is-MB. Operator's Manual - page 12

14. COMPENSATION FUNCTION

PROGRAMMING

B-63534EN/02

D When it is exceptional

End position for the arc is not

If the end of a line leading to an arc is programmed as the end of the arc

on the arc

by mistake as illustrated below, the system assumes that cutter

compensation has been executed with respect to an imaginary circle that

has the same center as the arc and passes the specified end position. Based

on this assumption, the system creates a vector and carries out

compensation. The resulting tool center path is different from that created

by applying cutter compensation to the programmed path in which the

line leading to the arc is considered straight.

Leading of the arc End the arc

Work-

Imaginary circle

piece

Programmed path

r

r

Tool center path

S

r

C

L

L

L

Center of the arc

The same description applies to tool movement between two circular

paths.

There is no inner intersection

If the cutter compensation value is sufficiently small, the two circular tool

center paths made after compensation intersect at a position

(P).

Intersection P may not occur if an excessively large value is specified for

cutter compensation. When this is predicted, P/S alarm No.033 occurs

at the end of the previous block and the tool is stopped. In the example

shown below, tool center paths along arcs A and B intersect at P when a

sufficiently small value is specified for cutter compensation. If an

excessively large value is specified, this intersection does not occur.

Alarm(No.033)occurs and the tod stops

When the cutter compensation value

is large

When the cutter compensa-

tion value is small

Center of the arc B

Center of the arc A

r

r

Programmed path

Arc A

Arc B

P

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The center of the arc is identiĆ

If the center of the arc is identical with the start position or end point, P/S

cal with the start position or

alarm (No. 038) is displayed, and the tool will stop at the end position of

the end position

the preceding block.

Alarm(No.038)is displayed and the tool

(G41)

stops

N5 G01 X100.0 ;

N6 G02 X100.0 I0 J0 ;

N7 G03 Y-100.0 J-100.0 ;

Tool center path

r

N5

N6

Programmed path

N7

D Change in the offset

The offset direction is decided by G codes (G41 and G42) for cutter radius

direction in the offset

and the sign of cutter compensation value as follows.

mode

Sign of offset amount

Gcode

+

-

G41

Left side offset

Right side offset

G42

Right side offset

Left side offset

The offset direction can be changed in the offset mode. If the offset

direction is changed in a block, a vector is generated at the intersection

of the tool center path of that block and the tool center path of a preceding

block. However, the change is not available in the start-up block and the

block following it.

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Tool center path with an inter-

section

Linear→Linear

S

Workpiece

L

G42

r

r

Programmed path

L

G41

Tool center path

Workpiece

Linear→Circular

C

r

Workpiece

G41

G42

Programmed path

r

Workpiece

L

S

Tool center path

Circular→Linear

Workpiece

G42

Programmed path

r

Tool center path

C

L

S

r

G41

Workpiece

Circular→Circular

C

Workpiece

G42

r

Programmed path

r

G41

C

Tool center path

Workpiece

S

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Tool center path without an in-

When changing the offset direction in block A to block B using G41 and

tersection

G42, if intersection with the offset path is not required, the vector normal

to block B is created at the start point of block B.

Linear→Linear

S

L

Workpiece

r

(G42)

(G42)

G41

A

B

Programmed path

L

r

Workpiece

Tool center path

L

G42

Programmed path

G41

Tool center path

S

L

Linear→Circular

S

L

L

Tool center path

A

(G41)

G42

B

(G41)

r

Programmed path

S

Circular→Circular

C

S

An arc whose end position

is not on the arc

r

C

G41

Programmed path

(G42)

(G42)

r

r

C

L SL

Tool center path

Center

Center

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The length of tool center path Normally there is almost no possibility of generating this situation.

larger than the circumference However, when G41 and G42 are changed, or when a G40 was

of a circle

commanded with address I, J, and K this situation can occur.

In this case of the figure, the cutter compensation is not performed with

more than one circle circumference: an arc is formed from P₁ to P₂ as

shown. Depending on the circumstances, an alarm may be displayed due

to the ”Interference Check” described later. To execute a circle with more

than one circumference, the circle must be specified in segments.

Tool center path

Programmed path

N5

N7

P₁

P₂

(G42)

N5 G01 G91 X500.0 Y-700.0 ;

N6

N6 G41 G02 J-500.0 ;

N7 G42 G01 X500.0 Y700.0 ;

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D Temporary cutter

If the following command is specified in the offset mode, the offset mode

compensation cancel

is temporarily canceled then automatically restored. The offset mode can

be canceled and started as described in II-15.6.2 and 15.6.4.

Specifying G28 (automatic re-

If G28 is specified in the offset mode, the offset mode is canceled at an

turn to the reference position)

intermediate position. If the vector still remains after the tool is returned

in the offset mode

to the reference position, the components of the vector are reset to zero

with respect to each axis along which reference position return has been

made.

G28

Intermediate position

S

r

G00

r

S

(G42 G00)

S

S

Reference position

Specifying G29 (automatic re-

If G29 is commanded in the offset mode, the offset will be cancelled at

turn from the reference posi-

the intermediate point, and the offset mode will be restored automatically

tion) in the offset mode

from the subsequent block.

G29 specified immediately after G28

Intermediate position

Programmed path

G28

G29

r

S

G00

r

S

S

(G42 G00)

S

Tool center path Reference position

G29 specified not immediately after G28

Intermediate position

Programmed path

G29

G29

r

S

G00

r

S

S

(G42 G00)

Tool center path

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D Cutter compensation G

The offset vector can be set to form a right angle to the moving direction

code in the offset mode

in the previous block, irrespective of machining inner or outer side, by

commanding the cutter compensation G code (G41, G42) in the offset

mode, independently. If this code is specified in a circular command,

correct circular motion will not be obtained.

When the direction of offset is expected to be changed by the command

of cutter compensation G code (G41, G42), refer to Subsec.15.6.3.

Linear→Linear

G42 mode

A block specified by G42

r

L

L

Tool center path

S

Intersection

Circular→Linear

A block specified by G42

G42 mode

r

L

C

S Intersection

Programmed path

D Command cancelling the

During offset mode, if G92 (absolute zero point programming) is

offset vector temporarily

commanded,the offset vector is temporarily cancelled and thereafter

offset mode is automatically restored.

In this case, without movement of offset cancel, the tool moves directly

from the intersecting point to the commanded point where offset vector

is canceled. Also when restored to offset mode, the tool moves directly

to the intersecting point.

S

S

L

L

L

L

Tool center path

N6

S

N5

N8

Programmed path

N7

(G41)

G92 block

N5 G91 G01 X300.0 Y700.0 ;

N6 X-300.0 Y600.0 ;

N7 G92 X100.0 Y200.0 ;

N8 G90 G01 X400.0 Y800.0 ;

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D A block without tool

The following blocks have no tool movement. In these blocks, the tool

movement

will not move even if cutter compensation is effected.

M05 ; .

M code output

S21 ; .

S code output

G04 X10.0 ; .

Dwell

Commands (1)

G10 L11 P01 R10.0 ;

Cutter compensation value setting

to (6) are of no

(G17) Z200.0 ; .

Move command not included

movement.

in the offset plane.

G90 ; .

G code only

G91 X0 ; .

Move distance is zero.

When a single block without tool movement is commanded in the offset

A block without tool move-

ment specified in offset mode

mode, the vector and tool center path are the same as those when the block

is not commanded. This block is executed at the single block stop point.

N6 G91 X100.0 Y100.0 ;

N7

N8

N7 G04 X100.0 ;

Programmed path

N8 X100.0 ;

N6

L

Tool center path

SS

L

Block N7 is executed here.

However, when the move distance is zero, even if the block is commanded

singly, tool motion becomes the same as that when more than one block

of without tool movement are commanded, which will be described

subsequently.

N6 G91 X100.0 Y100.0 ;

N7

N8

Programmed path

N7 X0 ;

N8 X100.0 ;

N6

L

SS

Tool center path

L

Two blocks without tool movement should not be commanded

consecutively. If commanded, a vector whose length is equal to the offset

value is produced in a normal direction to tool motion in earlier block, so

overcutting may result.

N6 G91 X100.0 Y100.0 ;

N7 N8

N9

Programmed path

N7 S21 ;

N8 G04 X10.0 ;

N9 X100.0 ;

N6

L

SSS

Tool center path

L

Blocks N7 and N8 are executed

here.

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D Corner movement

When two or more vectors are produced at the end of a block, the tool

moves linearly from one vector to another. This movement is called the

corner movement.

If these vectors almost coincide with each other, the corner movement

isn’t performed and the latter vector is ignored.

nVx

Tool center path

r

nV_Y

r

This vector is ignored, if

∆Vxx∆V Limit, and

∆V_Yx∆V Limit

Programmed path

If ∆Vxx∆Vlimit and ∆Vyx∆Vlimit, the latter vector is ignored. The

∆Vlimit is set in advance by parameter (No. 5010).

If these vectors do not coincide, a move is generated to turn around the

corner. This move belongs to the latter block.

This move belongs to block N7, thus, the feedrate

is equal to that in block N7.

If the block N7 is G00 mode, the tool is moved at

S

G00 mode, while if it is G01, G02, G03, the tool is

moved at G01 mode.

N6

N7

However, if the path of the next block is semicircular or more, the above

function is not performed.

The reason for this is as follows:

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N4 G41 G91 G01 X150.0 Y200.0 ;

P₂ P3P4P5

N5 X150.0 Y200.0 ;

N6 G02 J-600.0 ;

N7 G01 X150.0 Y-200.0 ;

P₁

N8 G40 X150.0 Y-200.0 ;

P₆

N₇

N₅

N₄

N₈

Programmed path

Tool center path

N₆

If the vector is not ignored, the tool path is as follows:

P₁ → P₂ → P₃ → (Circle) → P₄ → P₅ → P₆

But if the distance between P2 and P3 is negligible, the point P3 is

ignored. Therefore, the tool path is as follows:

P₂ → P₄

Namely, circle cutting by the block N6 is ignored.

D Interruption of manual

For manual operation during the cutter compensation, refer to Section

operation

III-3.5, “ Manual Absolute ON and OFF.”

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14.6.4

Tool Movement in

Offset Mode Cancel

Explanations

D Tool movement around

an inside corner

Linear→Linear

(180°xα)

Workpiece

α

Programmed path

r

G40

L

S

Tool center path

L

Circular→Linear

α

r

G40

Work-

piece

S

C

L

Programmed path Tool center path

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D Tool movement around

Tool path has two types, A and B; and they are selected by parameter SUP

an outside corner at an

(No. 5003#0).

obtuse angle

(90°xα<180°)

Linear→Linear

G40

α

Workpiece

L

Programmed path

r

L

S

Tool center path

Type

A

Circular→Linear

G40

α

L

Work-

piece

r

S

C

Programmed path

Tool center path

Linear→Linear

G40

α

Workpiece

L

Programmed path

r

Tool center path

L

S

Intersection

Type

B

Circular→Linear

G40

α

L

Work-

r

r

piece

S

C

L

LIntersection

Programmed path

Tool center path

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D Tool movement around

Tool path has two types, A and B : and they are selected by parameter SUP

an outside corner at an

(No. 5003#0)

acute angle

(α<90°)

Linear→Linear

G40

Workpiece

L α

Programmed path

G42

r

Tool center path

L

S

Type

A

Circular→Linear

G40

L

α

r

G42

Work-

S

piece

C

Tool center path

Programmed path

Linear→Linear

L

G40

Workpiece

α

r

L

Programmed path

r

Tool center path

L

L

L

S

Type

B

Circular→Linear

L

r

α

L

r

L

Work-

S

L

piece

C

Tool center path

Programmed path

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D Tool movement around

the outside linear→linear

S

Tool center path

at an acute angle less

L

than 1 degree (α<1°)

L

r

Programmed path

(G42)

1°or less

G40

Start position

D A block without tool

When a block without tool movement is commanded together with an

movement specified

offset cancel, a vector whose length is equal to the offset value is produced

together with offset

in a normal direction to tool motion in the earlier block, the vector is

cancel

cancelled in the next move command.

N6 G91 X100.0 Y100.0 ;

N7

N8

N7 G40 ;

N8 X100.0 Z0 ;

N6

L

Programmed path

SS

L

Tool center path

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D Block containing G40

and I_J_K_

The previous block contains

If a G41 or G42 block precedes a block in which G40 and I_, J_, K_ are

G41 or G42

specified, the system assumes that the path is programmed as a path from

the end position determined by the former block to a vector determined

by (I,J), (I,K), or (J,K). The direction of compensation in the former block

is inherited.

N1 (G42 mode) ;

In the N1 block, the tool center moves towards X.

N2 G40 Xa Yb I_ J_ ;

In the N2 block, the tool moves towards E.

E(a, b)

(I, J)

G40

N2

X

Tool center path

S

N1

r

r

(G42) Programmed path

Workpiece

In this case, note that the CNC obtains an intersection of the tool path

irrespective of whether inner or outer side machining is specified

E

G40

X

Tool center path

S

r

Programmed path

(G42)

r

(I, J)

When an intersection is not obtainable, the tool comes to the normal

position to the previous block at the end of the previous block.

E

G40

Tool center path

X

S

r

(G42)

Programmed path

(I, J)

r

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The length of the tool center In the example shown below, the tool does not trace the circle more than

path larger than the circumfer- once. It moves along the arc from P1 to P2. The interference check

ence of a circle

function described in II-15.6.5 may raise an alarm.

Tool center path

P₁

P2

Programmed path

N7

N5

N6

(I, J)

(G41)

N5 G01 G91 X100.0 ;

N6 G02 J-60.0 ;

N7 G40 G01 X50.0 Y50.0 I-10.0 J-10.0 ;

To make the tool trace a circle more than once, program two or more arcs.

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14.6.5

Tool overcutting is called interference. The interference check function

checks for tool overcutting in advance. However, all interference cannot

Interference Check

be checked by this function. The interference check is performed even if

overcutting does not occur.

Explanations

D Criteria for detecting

(1) The direction of the tool path is different from that of the programmed

interference

path (from 90 degrees to 270 degrees between these paths).

Tool center path

Programmed path

The directions of

these two paths are

different (180°).

Tool center path

Programmed path

The directions of

these two paths are

different (180°).

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(2) In addition to the condition (1), the angle between the start point and

end point on the tool center path is quite different from that between

the start point and end point on the programmed path in circular

machining(more than 180 degrees).

r2

Tool center path

r1

N5

N6

Programmed path

N7

Center

(G41)

N5 G01 G91 X800.0 Y200.0 D1 ;

N6 G02 X320.0 Y-160.0 I-200.0 J-800.0 D2 ;

N7 G01 X200.0 Y-500.0 ;

(Tool compensation value corresponding to D1 : r₁ = 200.0)

(Tool compensation value corresponding to D2 : r₂ = 600.0)

In the above example, the arc in block N6 is placed in the one quadrant.

But after cutter compensation, the arc is placed in the four quadrants.

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D Correction of

(1) Removal of the vector causing the interference

interference in advance

When cutter compensation is performed for blocks A, B and C and

vectors V₁, V₂, V₃ and V₄ between blocks A and B, and V₅, V₆, V₇

and V₈ between B and C are produced, the nearest vectors are checked

first. If interference occurs, they are ignored. But if the vectors to be

ignored due to interference are the last vectors at the corner, they

cannot be ignored.

Check between vectors V₄ and V₅

Interference --- V₄ and V₅ are ignored.

Check between V₃ and V₆

Interference --- V₃ and V₆ are ignored

Check between V₂ and V₇

Interference --- V₂ and V₇ are Ignored

Check between V₁ and V₈

Interference ----- V₁ and V₈ are cannot be ignored

If while checking, a vector without interference is detected,

subsequent vectors are not checked. If block B is a circular

movement, a linear movement is produced if the vectors are

interfered.

(Example 1) The tool moves linearly from V₁ to V₈

V₇

V₂

V₁

V₈

Tool

C

center path

V₃

C

r

V₆

r

Programmed

A

C

V₅

V₄

path

B

V₄, V₅ : Interference

V₃, V₆ : Interference

V₂, V₇ : Interference

V₁, V₈ : No Interference

O₁

O₂

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(Example 2) The tool moves linearly from V₁, V₂, V₇, to V₈

V₇

V₂

V₁

V₈

Tool center

C

path

V₆

V₃

C

r

r

A

C

V₅

V₄

Programmed path

B

V₄, V₅ : Interference

V₃, V₆

: Interference

O₁

O₂

V₂, V₇ : No Interference

(2) If the interference occurs after correction (1), the tool is stopped with

an alarm.

If the interference occurs after correction (1) or if there are only one

pair of vectors from the beginning of checking and the vectors

interfere, the P/S alarm (No.41) is displayed and the tool is stopped

immediately after execution of the preceding block. If the block is

executed by the single block operation, the tool is stopped at the end

of the block.

Tool center

path

Stopped

Programmed path

C

A

V₁

V₆

V₅

V₂

B

After ignoring vectors V₂ and V₅ because of interference, interference

also occurs between vectors V₁ and V_6. The alarm is displayed and

the tool is stopped.

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D When interference is

assumed although actual

(1) Depression which is smaller than the cutter compensation value

interference does not

occur

Programmed path Tool center path

Stopped

A

C

B

There is no actual interference, but since the direction programmed in

block B is opposite to that of the path after cutter compensation the tool

stops and an alarm is displayed.

(2) Groove which is smaller than the cutter compensation value

Programmed path Tool center path

Stopped

A

B

C

Like (1), P/S alarm is displayed because of the interference as the

direction is reverse in block B.

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14.6.6

Overcutting by Cutter

Compensation

Explanations

D Machining an inside

When the radius of a corner is smaller than the cutter radius, because the

corner at a radius

inner offsetting of the cutter will result in overcuttings, an alarm is

smaller than the cutter

displayed and the CNC stops at the start of the block. In single block

radius

operation, the overcutting is generated because the tool is stopped after

the block execution.

Tool center path

An alarm is generated

and the operation

Programmed path

stops

Workpiece

An alarm is generated and

the operation stops here in

single block operation

ÇÇ

ÇÇ

If the CNC does not

stop, overcutting occurs

ÇÇ

ÇÇÇÇ

ÇÇÇ

D Machining a groove

Since the cutter compensation forces the path of the center of the tool to

smaller than the tool

move in the reverse of the programmed direction, overcutting will result.

radius

In this case an alarm is displayed and the CNC stops at the start of the

block.

An alarm is displayed and the operation

Tool center path

stops

Programmed path

Workpiece

ÇÇÇÇÇ

ÇÇÇÇÇÇ

ÇÇÇÇÇÇ

ÇÇÇÇÇ

Overcutting if the operation would not stop

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D Machining a step smaller

When machining of the step is commanded by circular machining in the

than the tool radius

case of a program containing a step smaller than the tool radius, the path

of the center of tool with the ordinary offset becomes reverse to the

programmed direction. In this case, the first vector is ignored, and the tool

moves linearly to the second vector position. The single block operation

is stopped at this point. If the machining is not in the single block mode,

the cycle operation is continued. If the step is of linear, no alarm will be

generated and cut correctly. However uncut part will remain.

Linear movement Stop position after execution of a single

block

S

Tool center path

The first vector is ignored

Ç

Ç

Ç

Programmed path

Ç

Ç

Center of the circu-

ÇÇÇÇÇÇ

lar machining

ÇÇÇÇÇ

Workpiece

ÇÇÇ

An overcutting will result if the first vector is not ignored.

However, tool moves linearly.

D Starting compensation

It is usually used such a method that the tool is moved along the Z axis

and cutting along the

after the cutter compensation is effected at some distance from the

Z-axis

workpiece at the start of the machining.

In the case above, if it is desired to divide the motion along the Z axis into

rapid traverse and cutting feed, follow the procedure below.

N1 G91 G00 G41 X500.0 Y500.0 D1 ;

N3 G01 Z-300.0 F100 ;

N6 Y1000.0 F200 ;

After compensation

Work-

piece

N6

ÊÊÊÊ

ÊÊÊÊ

N3:Move command in Z axis

ÊÊÊÊ

(500, 500)

ÊÊÊÊ

N1

Ê

In the program example above, when executing block N1, blocks N3 and

N6 are also entered into the buffer storage, and by the relationship among

them the correct compensation is performed as in the figure above.

Then, if the block N3 (move command in Z axis) is divided as follows:

As there are two move command blocks not included in the selected plane

and the block N6 cannot be entered into the buffer storage, the tool center

path is calculated by the information of N1 in the figure above. That is,

the offset vector is not calculated in start-up and the overcutting may

result.

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The above example should be modified as follows:

N1 G91 G00 G41 X500.0 Y500.0 D1 ;

N3 G01 Z-250.0 ;

N5 G01 Z-50.0 F100 ;

N6 Y1000.0 F200 ;

Workpiece

After compensation

N6

ÊÊÊ

ÊÊÊÊ

ÊÊÊÊÊ

ÊÊÊÊ

N3, N5:Move command for the Z axis

N1ÊÊ^{(500, 500)}

The move command in the same direction as that of the move command

after the motion in Z axis should be programmed.

N1 G91 G00 G41 X500.0 Y400.0 D1 ;

N2 Y100.0 ;

N3 Z-250.0 ;

N5 G01 Z-50.0 F100 ;

N6 Y1000.0 F200 ;

Workpiece

After compensation

ÊÊÊ

N6

ÊÊÊÊ

ÊÊÊÊ

N2

ÊÊÊÊ

N3, N5 : Move command for the Z

axis (2blocks)

ÊÊÊÊ

(500, 500)

N1

As the block with sequence No. N2 has the move command in the same

direction as that of the block with sequence No. N6, the correct

compensation is performed.

333

14. COMPENSATION FUNCTION

PROGRAMMING

B-63534EN/02

14.6.7

Cutter compensation C is not performed for commands input from the

MDI.

Input Command from

However, when automatic operation using the absolute commands is

MDI

temporarily stopped by the single block function, MDI operation is

performed, then automatic operation starts again, the tool path is as

follows :

In this case, the vectors at the start position of the next block are translated

and the other vectors are produced by the next two blocks. Therefore,

from next block but one, cutter compensation C is accurately performed.

V_C1’

V_B2

V_C1

V_C2

V_B1

P_C

P_B

Command

V_B2’

for MDI

PA

P_D

V_B1’

P_B’

When position P_A, P_B, and P_C are programmed in an absolute command,

tool is stopped by the single block function after executing the block from

PA to PB and the tool is moved by MDI operation. Vectors VB1 and VB2

are translated to V_B1’ and V_B2’ and offset vectors are recalculated for the

vectors V_C1 and V_C2 between block P_B-P_C and P_C-P_D.

However, since vector V_B2 is not calculated again, compensation is

accurately performed from position P_C.

334

14. COMPENSATION FUNCTION

PROGRAMMING

B-63534EN/02

(1) G53 specified in offset mode

When CCN (bit 2 of parameter No.5003)=0

Oxxxx;

[Type A]

Start-up

G90G41_ _;

r

r

s

G00

G53X_Y_;

(G41G00)

s

G53

G00

s

[Type B]

Start-up

r

r

s

s

G00

G53

G00

s

When CCN (bit 2 of parameter No.5003)=1

[FS15 Type]

r

(G41G00) s

s

G00

G53

G00

s

(2) Incremental G53 specified in offset mode

When CCN (bit 2 of parameter No.5003)=0

O××××;

[Type A]

Start-up

G91G41_ _;

r

r

G53X_Y_;

s

G00

s

(G91G41G00)

G53

G90G00

[Type B]

Start-up

r

r

r

s

G00

(G91G41G00)

s

G53

G90G00

336

PROGRAMMING

14. COMPENSATION FUNCTION

B-63534EN/02

When CCN (bit2 of parameter No.5003)=1

[FS15 Type]

r

s

G00

(G91G41G00) s

G53

G90G00

(3) G53 specified in offset mode with no movement specified

When CCN (bit2 of parameter No.5003)=0

[Type A]

Oxxxx;

G90G41_ _;

r

Start-up

s

G00

G00X20.Y20. ;

G00

r

G53X20.Y20. ;

s

(G41G00)

G53

[Type B]

r

Start-up

s

G00

G00

r

s

(G41G00)

G53

When CCN (bit2 of parameter No.5003)=1

[FS15 Type]

s

G00

G00

r

s

(G41G00)

G53

337

14. COMPENSATION FUNCTION

PROGRAMMING

B-63534EN/02

WARNING

1

When cutter compensation C mode is set and all-axis machine lock is applied, the G53

command does not perform positioning along the axes to which machine lock is applied. The

vector, however, is preserved. When CCN (bit 2 of parameter No. 5003) is set to 0, the vector

is canceled.

(Note that even if the FS15 type is used, the vector is canceled when each-axis

machine lock is applied.)

Example 1:

When CCN (bit 2 of parameter No. 5003) = 0,

type A is used, and all-axis machine lock is applied

r

r

s

G00

(G41G00)

s

G00

G53

Example 2:

When CCN (bit 2 of parameter No. 5003) = 1

and all-axis machine lock is applied [FS15 type]

r

r

s

G00

(G41G00)

s

G00

G53

Example 3:

When CCN (bit 2 of parameter No. 5003) = 1

and specified-axis machine lock is applied [FS15 type]

r

r

s

G00

(G41G00)

s

G00

G53

2

When G53 is specified for a compensation axis in cutter compensation mode, the vectors along

the other axes are also canceled. (This also applies when CCN (bit 2 of parameter No.5003)

is set to 1. When the FS15 type is used, only the vector along a specified axis is canceled.

Note that the FS15 type cancellation differs from the actual FS15 specification in this point.)

Example: When CCN (bit 2 of parameter No.5003)=1[FS 15 type]

G00

s

(G41X_Z_)

G00

r

s

G53Z_

s

338

PROGRAMMING

14. COMPENSATION FUNCTION

B-63534EN/02

NOTE

1

When a G53 command specifies an axis that is not in the cutter compensation C plane, a

perpendicular vector is generated at the end point of the previous block, and the tool does not

move. In the next block, offset mode is automatically resumed (in the same way as when two

or more continuous blocks do not specify any move commands).

Example:

When CCN (bit 2 of parameter No. 5003) = 0, and type A is used

G53Z_

r

Start-up

(G41G00X_Y_)

s

r

G00

G00

s

G00

s

2

When a G53 block is specified to become a start-up block, the next block actually becomes

the start-up block. When CCN (bit 2 of parameter No. 5003) is set to 1, an intersection vector

is generated.

Example:

When CCN (bit 2 of parameter No. 5003) = 0 and type A is used

s

G00

Start-up

G41G53

G00

r

s

s

G00

339

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