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FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 42

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#7 HAD

In electronic gear box, the timing for reflecting helical gear compensation and travel

distance of automatic phase synchronization to absolute coordinates is:
0:

When synchronization is canceled.

During helical gear compensation and automatic phase synchronization.

7740

Feedrate during retraction

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm/min, inch/min, deg/min (machine unit)

[Min. unit of data] Depend on the increment system of the applied axis
[Valid data range] Refer to the standard parameter setting table (C)

(When the increment system is IS-B, 0.0 to +999000.0)
This parameter sets the feedrate during retraction for each axis.

7741

Retract amount

[Input type] Parameter input

[Data type] Real axis

[Unit of data] mm, inch, deg (machine unit)

[Min. unit of data] Depend on the increment system of the applied axis
[Valid data range] 9 digit of minimum unit of data (refer to standard parameter setting table (A))

(When the increment system is IS-B, -999999.999 to +999999.999)
This parameter sets the retract amount for each axis.

7772

Number of position detector pulses per rotation about the tool axis

[Input type] Parameter input

[Data type] 2-word path

[Unit of data] Detection unit

[Valid data range] 1 to 999999999

This parameter sets the number of pulses per rotation about the tool axis (master axis), for
the position detector.
When the increment system is IS-B, set 360000.

7773

Number of position detector pulses per rotation about the workpiece axis

[Input type] Parameter input

[Data type] 2-word path

[Unit of data] Detection unit

[Valid data range] 1 to 999999999

This parameter sets the number of pulses per rotation about the workpiece axis (slave
axis), for the position detector.
When the increment system is IS-B, set 360000.

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Alarm and message

Number

Message

Description

PS1593

EGB PARAMETER SETTING ERROR

Error in setting a parameter related to the EGB
(1) The slave axis specified with G81 is not set as a rotation

axis. (bit 0 (ROTx) of parameter No. 1006)

(2) Number of pulses per rotation (parameter No. 7772 or

7773) is not set.

(3) Although G81 is specified, a parameter such as

parameter No. 7710 or 4352 is not set.

(4) The slave axis specified in G81 is set as the slave axis of

the simple spindle EGB.

PS1594

EGB FORMAT ERROR

Error in the format of the block of an EGB command
(1) T (number of teeth) is not specified in the G81 block.
(2) In the G81 block, the data specified for one of T, L, P,

and Q is out of its valid range.

(3) In the G81 block, only one of P and Q is specified.

PS1595

ILL-COMMAND IN EGB MODE

During synchronization with the EGB, a command that must
not be issued is issued.
(1) Slave axis command using G27, G28, G29, G30, G33,

G53, etc.

(2) Inch/metric conversion command using G20, G21, etc.
(3) The Cs contour control mode is not selected for the slave

axis.

PS1596

EGB OVERFLOW

An overflow occurred in the calculation of the synchronization
coefficient.

1.9.3

Electronic Gear Box Automatic Phase Synchronization

Overview

In the electronic gear box (EGB), when the start or cancellation of synchronization is specified, the
synchronizing state is changed gradually by applying acceleration/deceleration. This is because if
synchronization is started or canceled immediately, a shock applies to the machine. Therefore,
synchronization can be started or canceled while the spindle is rotating. Also, synchronization ratio can
be changed while the spindle is rotating.
In addition, automatic phase synchronization is performed in such a way that, at the start of
synchronization, the position of the machine coordinate origin for the workpiece axis matches the spindle
position determined by the one-rotation signal. With this synchronization, the same operation is
performed as synchronization start caused by a one-rotation signal in hobbing synchronization when
using the functions of a hobbing machine.
The spindle corresponds to the EGB master axis and the workpiece axis corresponds to an EGB slave axis

(servo axis or Cs contouring axis).

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Format

Acceleration/deceleration type

G81 T _ L _ R1 ;

Synchronization start

G80 R1 ;

Synchronization cancellation

T :

Number of teeth (range of valid settings: 1-5000)

L :

Number of hob threads (range of valid settings: -250 to 250, excluding 0)

When L is positive, the direction of rotation about the workpiece axis is positive (+
direction).

When L is negative, the direction of rotation about the workpiece axis is negative (-
direction).

Acceleration/deceleration plus automatic phase synchronization type

G81 T _ L _ R2 ;

Synchronization start

G80 R1 ;

Synchronization cancellation

T :

Number of teeth (range of valid settings: 1-5000)

L :

Number of hob threads (range of valid settings: -250 to 250, excluding 0)

When L is positive, the direction of rotation about the workpiece axis is positive (+
direction).

When L is negative, the direction of rotation about the workpiece axis is negative (-
direction).

To use this function for the T series, set the following parameters.
Automatic phase synchronization is enabled in a command compatible with that for a hobbing machine
used in the T series.
Bit 0 (EFX) of parameter No. 7731=1
Bit 5 (HBR) of parameter No. 7731=1
Bit 6 (PHS) of parameter No. 7702=1

・

Acceleration/deceleration plus automatic phase synchronization type

G81.4 R _ L _ ;

Synchronization start

G80.4 ;

Synchronization cancellation

R : Number of teeth (range of valid settings: 1-5000)
L : Number of hob threads (range of valid settings: -250 to 250, excluding 0)

When L is positive, the direction of rotation about the workpiece axis is positive (+

direction).

When L is negative, the direction of rotation about the workpiece axis is negative (-

direction).

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Explanation

Acceleration/deceleration type

Synchronization

cancellation command

Synchronization

start command

Workpiece-

axis speed

Synchronization state

Acceleration

Deceleration

Spindle

speed

Fig. 1.9.3 (a)

G81R1 command
execution

G80R1 command execution

Acceleration

EGB mode signal

Deceleration

Fig. 1.9.3 (b)

Specify G81R1 to start synchronization.
When G81R1 is specified, the workpiece axis (slave axis) is subject to acceleration at the
acceleration rate set in parameter No. 7778. When the synchronization speed is reached, the EGB
mode signal, SYNMOD<Fn065.6>, becomes 1 and the G81R1 block is terminated.

For cancellation, specify G80R1 while the tool is moved away from the workpiece.

When G80R1 is specified, the EGB mode signal SYNMOD<Fn065.6> becomes “0” and
deceleration is started immediately at the acceleration rate set in parameter No. 7778.
When the speed is reduced to 0, the G80R1 block is terminated.

NOTE

1 During synchronization start/cancellation, acceleration/deceleration is linear.
2 In the automatic cancellation of synchronization due to one of the following

causes, deceleration is performed and synchronization is canceled:
<1>  Reset
<2>  PW0000, “POWER MUST BE OFF”
<3>  IO alarm

3 If bit 0 (EFX) of parameter No. 7731 is 0, the canned cycle for drilling cannot be

used. To use the canned cycle for drilling, set bit 0 (EFX) of parameter No. 7731
to 1 and use G81.4 instead of G81 and G80.4 instead of G80.

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Acceleration/deceleration plus automatic phase synchronization type

Automatic phase

synchronization

Synchronization

cancellation command

Synchronization

start command

Workpiece-

axis speed

Synchronization

state

Acceleration

Deceleration

Spindle

speed

Fig. 1.9.3 (c)

G80R2 command execution

EGB mode signal

Deceleration

G81R2 command execution

Acceleration

Automatic phase synchronization

Fig. 1.9.3 (d)

Move the workpiece axis to the position that corresponds to that of the one-rotation signal of the
spindle.

Specify G81R2 to start synchronization.
When G81R2 is specified, the workpiece axis is accelerated with the acceleration according to the
acceleration rate set in the parameter No.7778. Upon completion of phase synchronization, the EGB
mode signal SYNMOD<Fn065.6> becomes “1” and the G81R2 block terminates.

For cancellation, specify G80R2 while the tool is moved away from the workpiece.

When G80R2 is issued, the EGB mode signal SYNMOD<Fn065.6> becomes “0” and deceleration is
started immediately according to the acceleration rate set in parameter No. 7778. When the speed
reaches 0, the G80R2 block terminates.

CAUTION

1 Set the automatic phase synchronization speed in parameter No. 7776 and the

movement direction in bit 7 (PHD) of parameter No. 7702.

2 Phase synchronization acceleration/deceleration is performed with the rapid

traverse linear acceleration/deceleration rate (time constant specified in
parameter No. 1620).

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CAUTION

3 The workpiece axis speed is the speed synchronized with spindle rotation with

automatic phase synchronization speed being superposed. When setting the
position deviation limit parameter No. 1828, take the superposition into
consideration.

NOTE

1 The one-rotation signal used for automatic phase synchronization is issued not

by the spindle position coder but by the separate Pulsecoder attached to the
spindle and used to collect EGB feedback information. This means that the
orientation position based on the one-rotation signal issued by the spindle
position coder does not match the position used as the reference for the
workpiece axis when establishing phase synchronization for automatic phase
synchronization based on G81R2.

Moreover, the one-rotation signal of the separate Pulsecoder must be turned on
for each rotation of the spindle.

2 With the use of parameter No.7777, the position at which the phase of the

workpiece axis is matched can be shifted from the position corresponding to the
one-rotation signal in automatic phase matching.

3 Setting bit 6 (EPA) of parameter No. 7731 to 1 can perform automatic phase

synchronization in such a way that, at the start of synchronization, the position of
the workpiece axis matches the spindle position set by the one-rotation signal.

4 If bit 6 (EPA) of parameter No. 7731 is set to 1 to cause a synchronization

command to be issued again when synchronization is already established,
automatic phase synchronization is performed to move the workpiece axis in
such way that the position where the workpiece axis was when the G81R2
(synchronization command) was issued for the first time matches the spindle
position set by the one-rotation signal.

5 In automatic phase synchronization, movement is performed about the

workpiece axis from the current position to the nearest phase position in the
phase synchronization movement direction specified by the parameter.

6 Linear acceleration/deceleration applies to synchronization start/cancellation.
7 The acceleration/deceleration plus automatic phase synchronization type can be

executed by the bit 6 (PHS) of parameter No. 7702 without specifying an R2
command in a G81 or G80 block.

8 In the automatic cancellation of synchronization due to one of the following

causes, deceleration is performed and synchronization canceled:
<1> Reset
<2> PW0000, “POWER MUST BE OFF”
<3> IO alarm

9 When EGB (Spindle EGB is excluded) is used, it is necessary to move the

separate Pulsecoder attached to the spindle by one rotation or more before
executing automatic phase synchronization.

10 When the spindle EGB is used and the master axis is in the speed control mode,

perform position coder orientation before executing automatic phase
synchronization. In this case, set bit 7 (RFCHK3) of parameter No. 4016 for the
master axis to 0 to maintain the spindle one-rotation signal position in the speed
control mode.

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NOTE

11 When the spindle EGB is used and the master axis is in the Cs contour control

mode, perform reference position return before executing automatic phase
synchronization.

12 The acceleration rate parameter No.7778 must not be changed in the

synchronization mode.

13 If the acceleration rate parameter No. 7778 is 0, alarm PS1598, “EGB AUTO

PHASE PARAMETER SETTING ERROR” is issued when G81 is issued.

14 In the Series 16

, acceleration for automatic phase matching is set by specifying

a feedrate and a time constant in parameters Nos. 2135 and 2136 (Nos. 4384
and 4385 in the case of spindle EGB) separately; in the Series 0

-F Plus,

acceleration is directly set in parameter No. 7778.

15 If bit 0 (EFX) of parameter No. 7731 is 0, the canned cycle for drilling cannot be

used. To use the canned cycle for drilling, set bit 0 (EFX) of parameter No. 7731
to 1 and use G81.4 instead of G81 and G80.4 instead of G80.

16 In the case of bit 7 (HAD) of parameter No.7731 is 0, travel distance of

automatic phase synchronization is reflected to absolute coordinates when the
synchronization is canceled. In the case of bit 7 (HAD) of parameter No.7731 is
1, travel distance of automatic phase synchronization is reflected to absolute
coordinates during automatic phase synchronization.

Direction of rotation (for the spindle EGB)

The EGB automatic phase synchronization function assumes that the direction of rotation about the slave
axis is the same as that of rotation about the master axis.

Fig. 1.9.3 (e)

When this function is used, the SFR/SRV function in the Cs contour mode (*) cannot be used.
If you want to change the direction of rotation about the master axis, change the sign of the master axis
mode command.
*

SFR/SRV function in the Cs contour mode

The SFR/SRV signal determines the direction of rotation of the spindle in the Cs contour mode.

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Signal

EGB mode signal SYNMOD< Fn065.6>

[Classification] Output signal

[Function] Reports that synchronization with the EGB is in progress.

[Operation] This signal becomes “1” if:

Synchronization with the EGB is in progress.

It becomes “0” if:
-

Synchronization with the EGB is canceled.

Signal address

Fn065

SYNMOD

Parameter

4016

RFCHK3

[Input type] Parameter input

[Data type] Bit spindle

#6 RFCHK3

When the EGB master axis is in the speed control mode, if you want to execute automatic

phase synchronization, be sure to set RFCHK3 for the master axis to 0.

7702

PHD

PHS

[Input type] Parameter input

[Data type] Bit path

#6 PHS

When the G81/G80 block contains no R command:

Acceleration/deceleration is not performed at the start or cancellation of EGB
synchronization.

Acceleration/deceleration is performed at the start or cancellation of EGB
synchronization. After acceleration at the start of synchronization, phase
synchronization is automatically performed.

#7 PHD

The direction of movement for automatic phase synchronization is:

Positive (+).

Negative (-).

7731

HAD

EPA

HBR

EFX

[Input type] Parameter input

[Data type] Bit path

#0 EFX

As the EGB command:

G80 and G81 are used.

G80.4 and G81.4 are used.

NOTE

When this parameter is set to 0, no canned cycle for drilling can be
used.

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