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FANUC Series 0i-MODEL D, Series 0i Mate-MODEL D. For Lathe System USER’S MANUAL - page 3

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

(4) Operation 4 moves the tool to the start coordinate of the first axis

on the plane

(start Z-coordinate for the ZX plane) in rapid

traverse. (The tool returns to the start point (A).)

CAUTION

Notes on this threading are the same as in

threading in G32. However, a stop by feed hold is

as follows; Stop after completion of path 3 of

threading cycle.

NOTE

In the single block mode, operations 1, 2, 3, and 4

are performed by pressing cycle start button once.

- Canceling the mode

To cancel the canned cycle mode, specify a group 01 G code other

than G90, G92, or G94.

- Acceleration/deceleration after interpolation for threading

Acceleration/deceleration after interpolation for threading is

acceleration/deceleration of exponential interpolation type. By setting

bit

5

(THLx) of parameter No.

1610, the same

acceleration/deceleration as for cutting feed can be selected.

(The

settings of bit

0 (CTLx) of parameter No.

1610 are followed.)

However, as a time constant and FL feedrate, the settings of parameter

No. 1626 and No. 1627 for the threading cycle are used.

- Time constant and FL feedrate for threading

The time constant for acceleration/deceleration after interpolation for

threading specified in parameter No.

1626 and the FL feedrate

specified in parameter No. 1627 are used.

- Thread chamfering

Thread chamfering can be performed. A signal from the machine tool,

initiates thread chamfering. The chamfering distance r is specified in a

range from 0.1L to 12.7L in 0.1L increments by parameter No. 5130.

(In the above expression, L is the thread lead.)

A thread chamfering angle between 1 to 89 degrees can be specified in

parameter No. 5131. When a value of 0 is specified in the parameter,

an angle of 45 degrees is assumed.

For thread chamfering, the same type of acceleration/deceleration after

interpolation, time constant for acceleration/deceleration after

interpolation, and FL feedrate as for threading are used.

NOTE

Common parameters for specifying the amount and

angle of thread chamfering are used for this cycle

and threading cycle with G76.

- 44 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

- Retraction after chamfering

The following table lists the feedrate, type of acceleration/deceleration

after interpolation, and time constant of retraction after chamfering.

Parameter

Parameter

CFR

Description

No. 1466

(No. 1611#0)

Uses the type of acceleration/deceleration after

interpolation for threading, time constant for

Other than

0

threading (parameter No. 1626), FL feedrate

0

(parameter No. 1627), and retraction feedrate

specified in parameter No. 1466.

Uses the type of acceleration/deceleration after

interpolation for threading, time constant for

0

0

threading (parameter No. 1626), FL feedrate

(parameter No. 1627), and rapid traverse rate

specified in parameter No. 1420.

Before retraction a check is made to see that the

specified feedrate has become 0 (delay in

acceleration/deceleration is 0), and the type of

1

acceleration/deceleration after interpolation for

rapid traverse is used together with the rapid

traverse time constant and the rapid traverse

rate (parameter No. 1420).

By setting bit 4 (ROC) of parameter No. 1403 to 1, rapid traverse

override can be disabled for the feedrate of retraction after

chamfering.

NOTE

During retraction, the machine does not stop with

an override of 0% for the cutting feedrate

regardless of the setting of bit 4 (RF0) of parameter

No. 1401.

- Shifting the start angle

Address Q can be used to shift the threading start angle.

The start angle (Q) increment is 0.001 degrees and the valid setting

range is between

0 and 360 degrees. No decimal point can be

specified.

- 45 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Feed hold in a threading cycle (threading cycle retract)

Feed hold may be applied during threading (operation 2). In this case,

the tool immediately retracts with chamfering and returns to the start

point on the second axis (X-axis), then the first axis (Z-axis) on the

plane.

Ordinary cycle

X axis

Motion at feed hold

Z axis

Start point

Rapid traverse

Cutting feed

Feed hold is effected here.

The chamfered angle is the same as that at the end point.

CAUTION

Another feed hold cannot be made during retreat.

- Inch threading

Inch threading specified with address E is not allowed.

- 46 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.1.2.2

Taper threading cycle

Format

G92 X(U)_Z(W)_R_F_Q_;

X_,Z_ : Coordinates of the cutting end point (point A' in the

figure below) in the direction of the length

U_,W_ : Travel distance to the cutting end point (point A' in

the figure below) in the direction of the length

Q_

: Angle for shifting the threading start angle

(Increment: 0.001 degrees,

Valid setting range: 0 to 360 degrees)

R_

: Taper amount (R in the figure below)

F_

: Thread lead (L in the figure below)

X axis

Z

W

A

4(R)

U/2

(R)

Rapid traverse

3(R)

1(R)

A’

(F)

Cutting feed

2(F)

R

X/2

Z axis

L

(The chamfered angle in the left figure

is 45 degrees or less because of the

Approx. 45°

delay in the servo system.)

r

Detailed chamfered thread

Fig. 4.1.2 (d) Taper threading cycle

- 47 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

Explanation

The ranges of thread leads and restrictions related to the spindle speed

are the same as for threading with G32.

The figure of a taper is determined by the coordinates of the cutting

end point (A') in the direction of the length and the sign of the taper

amount (address R). For the cycle in the figure above, a minus sign is

added to the taper amount.

NOTE

The increment system of address R for specifying a

taper depends on the increment system for the

reference axis. Specify a radius value at R.

- Operations

A taper threading cycle performs the same four operations as a straight

threading cycle.

However, operation 1 moves the tool from the start point (A) to the

position obtained by adding the taper amount to the specified

coordinate of the second axis on the plane (specified X-coordinate for

the ZX plane) in rapid traverse.

Operations 2, 3, and 4 after operation 1 are the same as for a straight

threading cycle.

CAUTION

Notes on this threading are the same as in

threading in G32. However, a stop by feed hold is

as follows; Stop after completion of path 3 of

threading cycle.

NOTE

In the single block mode, operations 1, 2, 3, and 4

are performed by pressing cycle start button once.

- 48 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

- Relationship between the sign of the taper amount and tool path

The tool path is determined according to the relationship between the

sign of the taper amount (address R) and the cutting end point in the

direction of the length in the absolute or incremental programming as

follows.

Outer diameter machining

Internal diameter machining

1. U < 0, W < 0, R < 0

2. U > 0, W < 0, R > 0

X

X

W

Z

Z

4(R)

2(F)

R

U/2

3(F)

1(R)

X

U/2

3(F)

1(R)

R

X

2(F)

4(R)

W

3. U < 0, W < 0, R > 0

4. U > 0, W < 0, R < 0

at |R|≤|U/2|

at |R|≤|U/2|

X

X

Z

W

Z

4(R)

1(R)

R

2(F)

X

U/2

3(F)

U/2

3(F)

2(F)

1(R)

R

4(R)

W

X

- Canceling the mode

To cancel the canned cycle mode, specify a group 01 G code other

than G90, G92, or G94.

- Acceleration/deceleration after interpolation for threading

- Time constant and FL feedrate for threading

- Thread chamfering

- Retraction after chamfering

- Shifting the start angle

- Threading cycle retract

- Inch threading

See the pages on which a straight threading cycle is explained.

- 49 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

4.1.3

End Face Turning Cycle (G94)

4.1.3.1

Face cutting cycle

Format

G94 X(U)_Z(W)_F_;

X_,Z_ : Coordinates of the cutting end point (point A' in the

figure below) in the direction of the end face

U_,W_ : Travel distance to the cutting end point (point A' in

the figure below) in the direction of the end face

F_

: Cutting feedrate

X axis

1

(R)

(R)... Rapid traverse

A

(F)

Cutting feed

2

(F)

4

(R)

U/2

A’

3

(F)

X/2

W

Z axis

Z

Fig. 4.1.3 (e) Face cutting cycle

Explanation

- Operations

A face cutting cycle performs four operations:

(1) Operation

1 moves the tool from the start point

(A) to the

specified coordinate of the first axis on the plane

(specified

Z-coordinate for the ZX plane) in rapid traverse.

(2) Operation 2 moves the tool to the specified coordinate of the

second axis on the plane (specified X-coordinate for the ZX

plane) in cutting feed. (The tool is moved to the cutting end point

(A') in the direction of the end face.)

(3) Operation 3 moves the tool to the start coordinate of the first axis

on the plane (start Z-coordinate for the ZX plane) in cutting feed.

(4) Operation 4 moves the tool to the start coordinate of the second

axis on the plane (start X-coordinate for the ZX plane) in rapid

traverse. (The tool returns to the start point (A).)

NOTE

In single block mode, operations 1, 2, 3, and 4 are

performed by pressing the cycle start button once.

- 50 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

- Canceling the mode

To cancel the canned cycle mode, specify a group 01 G code other

than G90, G92, or G94.

4.1.3.2

Taper cutting cycle

Format

G94 X(U)_Z(W)_R_F_;

X_,Z_ : Coordinates of the cutting end point (point A' in the

figure below) in the direction of the end face

U_,W_ : Travel distance to the cutting end point (point A' in

the figure below) in the direction of the end face

R_

: Taper amount (R in the figure below)

F_

: Cutting feedrate

X axis

1(R)

A

(R) ... Rapid traverse

2(F)

4(R)

(F) ... Cutting feed

U/2

A’

3(F)

X/2

R

W

Z axis

Z

Fig. 4.1.3 (f) Taper cutting cycle

Explanation

The figure of a taper is determined by the coordinates of the cutting

end point (A') in the direction of the end face and the sign of the taper

amount (address R). For the cycle in the figure above, a minus sign is

added to the taper amount.

NOTE

The increment system of address R for specifying a

taper depends on the increment system for the

reference axis. Specify a radius value at R.

- 51 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Operations

A taper cutting cycle performs the same four operations as a face

cutting cycle.

However, operation 1 moves the tool from the start point (A) to the

position obtained by adding the taper amount to the specified

coordinate of the first axis on the plane (specified Z-coordinate for the

ZX plane) in rapid traverse.

Operations 2, 3, and 4 after operation 1 are the same as for a face

cutting cycle.

NOTE

In single block mode, operations 1, 2, 3, and 4 are

performed by pressing the cycle start button once.

- Relationship between the sign of the taper amount and tool path

The tool path is determined according to the relationship between the

sign of the taper amount (address R) and the cutting end point in the

direction of the end face in the absolute or incremental programming

as follows.

Outer diameter machining

Internal diameter machining

1. U < 0, W < 0, R < 0

2. U > 0, W < 0, R < 0

X

Z

X

1(R)

Z

R

W

Z

3(F)

U/2

2(F)

4(R)

U/2

2(F)

4(R)

3(F)

1(R)

R

W

Z

3. U < 0, W < 0, R > 0

4. U > 0, W < 0, R > 0

at |R|≤|W|

at |R|≤|W|

X

W

X

R

Z

Z

3(F)

1(R)

2(F)

4(R)

U/2

U/2

2(F)

4(R)

1(R)

3(F)

Z

R

Z

W

- Canceling the mode

To cancel the canned cycle mode, specify a group 01 G code other

than G90, G92, or G94.

- 52 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.1.4

How to Use Canned Cycles (G90, G92, G94)

An appropriate canned cycle is selected according to the shape of the

material and the shape of the product.

- Straight cutting cycle (G90)

Shape of material

Shape of

product

- Taper cutting cycle (G90)

Shape of material

Shape of product

- 53 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Face cutting cycle (G94)

Shape of material

Shape of product

- Face taper cutting cycle (G94)

Shape of material

Shape of product

- 54 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.1.5

Canned Cycle and Tool Nose Radius Compensation

When tool nose radius compensation is applied, the tool nose center

path and offset direction are as shown below. At the start point of a

cycle, the offset vector is canceled. Offset start-up is performed for the

movement from the start point of the cycle. The offset vector is

temporarily canceled again at the return to the cycle start point and

offset is applied again according to the next move command. The

offset direction is determined depending of the cutting pattern

regardless of the G41 or G42 mode.

Outer diameter/internal diameter cutting cycle (G90)

Tool nose radius center path

Offset direction

0

Tool nose radius

center path

8

3

Total tool nose

4

7

5

1

2

6

Total tool nose

Total tool

nose

Programmed path

End face cutting cycle (G94)

Tool nose radius center path

Offset direction

Tool nose radius

0

center path

8

4

3

Total tool nose

5

7

1

6

2

Total tool nose

Total tool

nose

Programmed path

Threading cycle (G92)

Tool nose radius compensation cannot be applied.

- 55 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

Differences between this CNC and the Series 0i-C

NOTE

This CNC is the same as the Series 0i-C in the

offset direction, but differs from the series in the

tool nose radius center path.

- For this CNC

Cycle operations of a canned cycle are replaced

with G00 or G01. In the first block to move the

tool from the start point, start-up is performed. In

the last block to return the tool to the start point,

offset is canceled.

- For the Series 0i-C

This series differs from this CNC in operations in

the block to move the tool from the start point

and the last block to return it to the start point.

For details, refer to "Series 0i-C Operator's

Manual."

How compensation is applied for the Series 0i-C

G90

G94

Tool nose radius center path

Tool nose radius center path

4,8,3

0

4,8,3

0

8

8

5,0,7

4

3

5,0,7

4

3

5

7

5

7

2

2

1,6,2

1

1,6,2

1

6

6

Total tool

Total tool

4,5,1

8,0,6

nose

4,5,1

8,0,6

nose

3,7,2

3,7,2

Programmed path

Programmed path

- 56 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

4.1.6

Restrictions on Canned Cycles

Limitation

- Modal

Since data items X (U), Z (W), and R in a canned cycle are modal

values common to G90, G92, and G94. For this reason, if a new X (U),

Z (W), or R value is not specified, the previously specified value is

effective.

Thus, when the travel distance along the Z-axis does not vary as

shown in the program example below, a canned cycle can be repeated

only by specifying the travel distance along the X-axis.

Example

X axis

66

4

8

12

16

Workpiece

0

The cycle in the above figure is executed by the following

program:

N030 G90 U-8.0 W-66.0 F0.4;

N031 U-16.0;

N032 U-24.0;

N033 U-32.0;

The modal values common to canned cycles are cleared when a

one-shot G code other than G04 is specified.

Since the canned cycle mode is not canceled by specifying a one-shot

G code, a canned cycle can be performed again by specifying modal

values. If no modal values are specified, no cycle operations are

performed.

When G04 is specified, G04 is executed and no canned cycle is

performed.

- 57 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

4.2.1

Stock Removal in Turning (G71)

There are two types of stock removals in turning : Type I and II.

Format

ZpXp plane

G71 U(∆d) R(e) ;

G71 P(ns) Q(nf) U(∆u) W(∆w) F(f ) S(s ) T(t ) ;

N (ns) ;

The move commands for the target figure from A

to A’ to B are specified in the blocks with

N (nf) ;

sequence numbers ns to nf.

YpZp plane

G71 W(∆d) R(e) ;

G71 P(ns) Q(nf) V(∆w) W(∆u) F(f ) S(s ) T(t ) ;

N (ns) ;

N (nf) ;

XpYp plane

G71 V(∆d) R(e) ;

G71 P(ns) Q(nf) U(∆w) V(∆u) F(f ) S(s ) T(t ) ;

N (ns) ;

N (nf) ;

∆d

: Depth of cut

The cutting direction depends on the direction AA'.

This designation is modal and is not changed until the

other value is designated. Also this value can be

specified by the parameter (No. 5132), and the

parameter is changed by the program command.

e

: Escaping amount

This designation is modal and is not changed until the

other value is designated. Also this value can be

specified by the parameter (No. 5133), and the

parameter is changed by the program command.

ns

: Sequence number of the first block for the program of

finishing shape.

nf

: Sequence number of the last block for the program of

finishing shape.

∆u

: Distance of the finishing allowance in the direction of

the second axis on the plane (X-axis for the ZX plane)

∆w : Distance of the finishing allowance in the direction of

the first axis on the plane (Z-axis for the ZX plane)

f,s,t : Any F , S, or T function contained in blocks ns to nf in

the cycle is ignored, and the F, S, or T function in this

G71 block is effective.

- 60 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Diameter/radius

Decimal

Unit

Sign

programming

point input

Depends on the increment

∆d

system for the reference

Radius programming

Not required

Allowed

axis.

Depends on the increment

e

system for the reference

Radius programming

Not required

Allowed

axis.

Depends on

Depends on the increment

diameter/radius

∆u

system for the reference

Required

Allowed

programming for the

axis.

second axis on the plane.

Depends on

Depends on the increment

diameter/radius

∆w

system for the reference

Required

Allowed

programming for the first

axis.

axis on the plane.

(R)

C

B

A

(R)

∆d

(F)

45°

e

(F)

Target figure

∆u/2

+X

A’

(F): Cutting feed

e: Escaping amount

∆W

+Z

(R): Rapid traverse

Fig. 4.2.1 (a) Cutting path in stock removal in turning (type I)

Explanation

- Operations

When a target figure passing through A, A', and B in this order is

given by a program, the specified area is removed by ∆d (depth of cut),

with the finishing allowance specified by ∆u/2 and ∆w left. After the

last cutting is performed in the direction of the second axis on the

plane

(X-axis for the ZX plane), rough cutting is performed as

finishing along the target figure. After rough cutting as finishing, the

block next to the sequence block specified at Q is executed.

- 61 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

NOTE

1 While both ∆d and ∆u are specified by the same

address, the meanings of them are determined by

the presence of addresses P and Q.

2 The cycle machining is performed by G71

command with P and Q specification.

3 F, S, and T functions which are specified in the

move command between points A and B are

ineffective and those specified in G71 block or the

previous block are effective. M and second

auxiliary functions are treated in the same way as

F, S, and T functions.

4 When the constant surface speed control function

is enabled (bit 0 (SSC) of parameter No. 8133 is

set to 1), the G96 or G97 command specified in

the move command between points A and B is

ignored. If you want to enable the G96 or G97

command, specify the command in the G71 or

previous block.

- Target figure

Patterns

The following four cutting patterns are considered. All of these cutting

cycles cut the workpiece with moving the tool in parallel to the first

axis on the plane (Z-axis for the ZX plane). At this time, the signs of

the finishing allowances of ∆u and ∆w are as follows:

B

A

A

B

U(+)…W(+)

U(+)…W(-)

A'

A'

Both linear and

A'

A'

circular interpolation

are possible

U(-)…W(+)

U(-)…W(-)

B

A

A

B

+X

+Z

Fig. 4.2.1 (b) Four target figure patterns

- 62 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Limitation

(1) For U(+), a figure for which a position higher than the cycle start

point is specified cannot be machined.

For U(-), a figure for which a position lower than the cycle start

point is specified cannot be machined.

(2) For type I, the figure must show monotone increase or decrease

along the first and second axes on the plane.

(3) For type II, the figure must show monotone increase or decrease

along the first axis on the plane.

- Start block

In the start block in the program for a target figure

(block with

sequence number ns in which the path between A and A' is specified),

G00 or G01 must be specified. If it is not specified, alarm PS0065 is

issued.

When G00 is specified, positioning is performed along A-A'. When

G01 is specified, linear interpolation is performed with cutting feed

along A-A'.

In this start block, also select type I or II.

- Check functions

During cycle operation, whether the target figure shows monotone

increase or decrease is always checked.

NOTE

When tool nose radius compensation is applied,

the target figure to which compensation is applied

is checked.

The following checks can also be made.

Check

Related parameter

Checks that a block with the sequence

Enabled when bit 2 (QSR) of

number specified at address Q is contained

parameter No. 5102 is set to

in the program before cycle operation.

1.

Checks the target figure before cycle

Enabled when bit 2 (FCK) of

operation.

parameter No. 5104 is set to

(Also checks that a block with the sequence

1.

number specified at address Q is contained.)

- 63 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

(2) The figure along path A'-B must show monotone increase or

decrease in the directions of both axes forming the plane (Z- and

X-axes for the ZX plane). It must not have any pocket as shown

in the figure below.

B

A

A’

X

Z

No pockets are allowed.

Fig. 4.2.1 (c) Figure which does not show monotone increase or

decrease (type I)

CAUTION

If a figure does not show monotone change along

the first or second axis on the plane, alarm PS0064

or PS0329 is issued. If the movement does not

show monotone change, but is very small, and it

can be determined that the movement is not

dangerous, however, the permissible amount can

be specified in parameters Nos. 5145 and 5146 to

specify that the alarm is not issued in this case.

(3) The tool escapes to the direction of 45 degrees in cutting feed

after rough cutting.

Escaping amount e (specified in the

45°

command or parameter No. 5133)

Fig. 4.2.1 (d) Cutting in the direction of 45 degrees (type I)

(4) Immediately after the last cutting, rough cutting is performed as

finishing along the target figure. Bit 1 (RF1) of parameter No.

5105 can be set to 1 so that rough cutting as finishing is not

performed.

- 65 -

4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

- Type II

(R)

(F)

C

(R)

B

A

∆d

(R)

(F)

∆d

(F)

Target figure

∆u/2

A’

+X

(F): Cutting feed

∆W

+Z

(R): Rapid traverse

Fig. 4.2.1 (e) Cutting path in stock removal in turning (type II)

When a target figure passing through A, A', and B in this order is

given by the program for a target figure as shown in the figure, the

specified area is removed by ∆d (depth of cut), with the finishing

allowance specified by ∆u/2 and ∆w left. Type II differs from type I in

cutting the workpiece along the figure after rough cutting in the

direction of the first axis on the plane (Z-axis for the ZX plane).

After the last cutting, the tool returns to the start point specified in

G71 and rough cutting is performed as finishing along the target

figure, with the finishing allowance specified by ∆u/2 and ∆w left.

Type II differs from type I in the following points:

(1) In the block with sequence number ns, the two axes forming the

plane (X-axis (U-axis) and Z-axis (W-axis) for the ZX plane)

must be specified. When you want to use type II without moving

the tool along the Z-axis on the ZX plane in the first block,

specify W0.

Example

ZX plane

G71 V10.0 R5.0;

G71 P100 Q200

;

N100 X(U)_ Z(W)_ ; (Specifies the two axes

forming the plane.)

:

;

:

;

N200…………;

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

(2) The figure need not show monotone increase or decrease in the

direction of the second axis on the plane (X-axis for the ZX

plane) and it may have concaves (pockets).

+X

10

3

2

1

+Z

Fig. 4.2.1 (f) Figure having pockets (type II)

The figure must show monotone change in the direction of the

first axis on the plane (Z-axis for the ZX plane), however. The

following figure cannot be machined.

Monotone change is not

observed along the Z-

axis.

+X

+Z

Fig. 4.2.1 (g) Figure which cannot be machined (type II)

CAUTION

For a figure along which the tool moves backward

along the first axis on the plane during cutting

operation (including a vertex in an arc command),

the cutting tool may contact the workpiece. For this

reason, for a figure which does not show monotone

change, alarm PS0064 or PS0329 is issued. If the

movement does not show monotone change, but is

very small, and it can be determined that the

movement is not dangerous, however, the

permissible amount can be specified in parameter

No. 5145 to specify that the alarm is not issued in

this case.

The first cut portion need not be vertical. Any figure is permitted

if monotone change is shown in the direction of the first axis on

the plane (Z-axis for the ZX plane).

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

+X

+Z

Fig. 4.2.1 (h) Figure which can be machined (type II)

(3) After turning, the tool cuts the workpiece along its figure and

escapes in cutting feed.

Escaping amount e (specified in the command or

parameter No. 5133)

Escaping after cutting

Depth of cut

∆d

(specified in the

command or parameter No. 5132)

Fig. 4.2.1 (i) Cutting along the workpiece figure (type II)

The escaping amount after cutting (e) can be specified at address

R or set in parameter No. 5133.

When moving from the bottom, however, the tool escapes to the

direction of 45 degrees.

e (specified in the command or

45°

parameter No. 5133)

Bottom

Fig. 4.2.1 (j) Escaping from the bottom to the direction of 45 degrees

(4) When a position parallel to the first axis on the plane (Z-axis for

the ZX plane) is specified in a block in the program for the target

figure, it is assumed to be at the bottom of a pocket.

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4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

(5) After all rough cutting terminates along the first axis on the plane

(Z-axis for the ZX plane), the tool temporarily returns to the

cycle start point. At this time, when there is a position whose

height equals to that at the start point, the tool passes through the

point in the position obtained by adding depth of cut ∆d to the

position of the figure and returns to the start point.

Then, rough cutting is performed as finishing along the target

figure. At this time, the tool passes through the point in the

obtained position (to which depth of cut ∆d is added) when

returning to the start point.

Bit 2 (RF2) of parameter No. 5105 can be set to 1 so that rough

cutting as finishing is not performed.

Escaping operation after rough cutting

Escaping operation after

as finishing

rough cutting

Start point

{

{

Depth of cut ∆d

Fig. 4.2.1 (k) Escaping operation when the tool returns to the start point

(type II)

(6) Order and path for rough cutting of pockets

Rough cutting is performed in the following order.

(a) When the figure shows monotone decrease along the first

axis on the plane (Z-axis for the ZX plane)

Rough cutting is performed in the order <1>, <2>, and <3>

from the rightmost pocket.

<3>

<2>

<1>

+X

+Z

Fig. 4.2.1 (l) Rough cutting order in the case of monotone decrease (type

II)

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

(b) When the figure shows monotone increase along the first

axis on the plane (Z-axis for the ZX plane)

Rough cutting is performed in the order <1>, <2>, and <3> from

the leftmost pocket.

<1>

<2>

<3>

+X

+Z

Fig. 4.2.1 (m) Rough cutting order in the case of monotone increase

(type II)

The path in rough cutting is as shown below.

35

4

3

1

34

5

24

9

10

25

2

23

29

22

21

28

11

6

30

8

26

15

27

7

33

31

12

14

20

16

32

13

19

18

17

Fig. 4.2.1 (n) Cutting path for multiple pockets (type II)

The following figure shows how the tool moves after rough cutting for

a pocket in detail.

g

Rapid traverse

21

22

•

D

20

Escaping from

the bottom

19

Cutting feed

Fig. 4.2.1 (o) Details of motion after cutting for a pocket (type II)

Cuts the workpiece at the cutting feedrate and escapes to the direction

of 45 degrees. (Operation 19)

Then, moves to the height of point D in rapid traverse. (Operation 20)

- 70 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

Then, moves to the position the amount of g before point D.

(Operation 21)

Finally, moves to point D in cutting feed.

The clearance g to the cutting feed start position is set in parameter No.

5134.

For the last pocket, after cutting the bottom, the tool escapes to the

direction of 45 degrees and returns to the start point in rapid traverse.

(Operations 34 and 35)

CAUTION

1 This CNC differs from the Series 0i-C in cutting of a

pocket.

The tool first cuts the nearest pocket to the start

point. After cutting of the pocket terminates, the

tool moves to the nearest but one pocket and starts

cutting.

2 When the figure has a pocket, generally specify a

value of 0 for ∆w (finishing allowance). Otherwise,

the tool may dig into the wall on one side.

- Tool nose radius compensation

When using tool nose radius compensation, specify a tool nose radius

compensation command

(G41, G42) before a multiple repetitive

canned cycle command (G70, G71, G72, G73) and specify the cancel

command (G40) outside the blocks (from the block specified with P to

the block specified with Q) specifying a target finishing figure.

If a tool nose radius compensation command (G40, G41, or G42) is

specified in the G70, G71, G72, or G73 command, alarm PS0325 is

issued.

When this cycle is specified in the tool nose radius compensation

mode, offset is temporarily canceled during movement to the start

point. Start-up is performed in the first block. Offset is temporarily

canceled again at the return to the cycle start point after termination of

cycle operation. Start-up is performed again according to the next

move command. This operation is shown in the figure below.

Start-up

Offset cancel

Cycle start point

z

Offset cancel

Start-up

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4. FUNCTIONS TO SIMPLIFY

PROGRAMMING

PROGRAMMING

B-64304EN-1/01

This cycle operation is performed according to the figure determined

by the tool nose radius compensation path when the offset vector is 0

at start point A and start-up is performed in a block between path

A-A'.

B

A

Position between A-

A' in which start-up is

Target figure program for

performed

which tool nose radius

compensation is not applied

+X

A’

Tool nose center path when tool nose radius

+Z

compensation is applied with G42

Fig. 4.2.1 (p) Path when tool nose radius compensation is applied

A

B

A’

Position between

+X

A-A' in which start-

up is performed

Target figure program for

Tool nose center path when tool

which tool nose radius

+Z

nose radius compensation is

compensation is not applied

applied with G42

NOTE

To perform pocketing in the tool nose radius

compensation mode, specify the linear block A-A'

outside the workpiece and specify the figure of an

actual pocket. This prevents a pocket from being

dug.

- 72 -

4.FUNCTIONS TO SIMPLIFY

B-64304EN-1/01

PROGRAMMING

PROGRAMMING

- Movement to the previous turning start point

Movement to the turning start point is performed with two operations.

(Operations

1 and 2 in the figure below.) As movement to the

present turning start point, operation 1 temporarily moves the tool to

the previous turning start point, then operation 2 moves the tool to the

present turning start point.

Operation 1 moves the tool in cutting feed. Operation 2 moves the

tool according to the mode (G00 or G01) specified in the start block in

the geometry program.

Bit 0 (ASU) of parameter No. 5107 can be set to 1 so that operation 1

moves the tool in rapid traverse.

For a type I command

Operation 1

Previous turning

start point

Operation 2

Present turning

start point

+X

:

Rapid traverse can be selected.

+Z

:

According to the mode in the start block.

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