FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 178

8. MULTI-PATH CONTROL

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(1) Specify the waiting M code before and after the M codes for starting advanced superimposition and

superimposed control.
(a) Starts advanced superimposed control.

Set the AI contour control permission signal OVLN to 1 and confirm that the advanced
superimposition mode signal OVLNS is changed to 1.

(b) Starts superimposed control.

Set the superimposed control axis selection signal OVLS1 to OVLS8 for the slave axis of
superimposed control to 1 (start of superimposed control) and confirm that the superimposed
control under way signal SYN1O to SYN8O is changed to 1.

(2) Specify the waiting M code before and after the M codes for canceling advanced superimposition

and superimposed control.
(a) Cancels superimposed control.

Set the superimposed control axis selection signal OVLS1 to OVLS8 for the slave axis of
superimposed control to 0 (cancel of superimposed control) and confirm that the superimposed
control under way signal SYN1O to SYN8O is changed to 0.

(b) Cancels advanced superimposed control.

Set the AI contour control permission signal OVLN to 0 and confirm that the advanced
superimposition mode signal OVLNS is changed to 0.

Functions for which the advanced superimpositon mode cannot be specified

For any path for which the advanced superimposition mode is on, the following functions cannot be
specified.
If any of the following functions is specified in the advanced superimposition mode, alarm PS0502 is
issued.
-

Reference position return in Cs contour control (G00,G28)

Skip function (G31)

Automatic tool length measurement / Automatic tool offset

Low-speed type automatic reference position return (G28)

High-speed program check

These functions can be specified after the advanced superimposition mode and superimposed control are
turned off.
See the following example for the program sequence for specifying M codes for the advanced
superimposition mode and superimposed control when a function that cannot be specified in the advanced
superimposition mode is used.

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Program example) (specifying G31 for the slave axis)

Path of master axis

Path of slave axis

M100P12; ----- Waiting
M210; ----- Advanced superimposition mode on.

M101P12; ----- Waiting
G05.1Q1; ----- AI contour control mode on.
~

M100P12; ----- Waiting
M212; ----- Advanced superimposition mode on.
M60; ----- Starts superimposed control.
M101P12; ----- Waiting
G05.1Q1; ----- AI contour control mode on.
~

: ------ Master axis move commands

~
M102P12; ----- Waiting

M211; ----- Advanced superimposition mode off.
M103P12; ----- Waiting

~
M102P12; ----- Waiting
M61; ----- Cancels superimposed control.
M213; ----- Advanced superimposition mode off.
M103P12; ----- Waiting

G31;

M104P12; ----- Waiting
M210; ----- Advanced superimposition mode on.

M105P12; ----- Waiting
~

M104P12; ----- Waiting
M212; ----- Advanced superimposition mode on.
M60; ----- Starts superimposed control.
M105P12; ----- Waiting
~

: ------ Master axis move commands

~
M106P12; ----- Waiting

M213; ----- Advanced superimposition mode off.
M107P12; ----- Waiting

~
M106P12; ----- Waiting
M61; ----- Cancels superimposed control.
M213; ----- Advanced superimposition mode off.
M107P12; ----- Waiting

NOTE

1 Start and cancel superimposed control for the slave axis. Specify the M code for

starting or canceling superimposed control in a block without specifying other
commands.

2 Use an unbuffered M code as the M code for turning the advanced

superimposition mode on or off. (parameters Nos. 3411 to 3420)

3 Do not specify any move or PMC axis control command between the M code for

turning the advanced superimposition mode on or off and a waiting M code.

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Sequence of advanced superimposition and superimposed control start command

Fig. 8.10 (a)

When the M code for turning the advanced superimposition mode on is specified and the AI contour
control permission signal OVLN is set to 1, the advanced superimposition mode signal OVLNS
becomes 1.

The completion signal FIN is operated for completion.

The waiting M code is specified in both the master and slave axis paths.

When the M code for starting superimposed control is specified, and the superimposed control axis
selection signal OVLS is set to 1, superimposed control starts. And, the superimposed control under
way signal SYN becomes 1.

When the superimposed control under way signal SYN becomes 1, the completion signal FIN is
operated for completion.

Superimposed control
axis selection signal
OVLS

Synchronous/composite/
superimposed control
under way signal SYN

Completion signal FIN

Strobe signal MF

Superimposed control start
M command

Waiting between paths

AI contour control permission
signal OVLN

Completion signal FIN

Strobe signal MF

Advanced superimposition
mode on M command

Advanced superimposition
mode signal OVLNS

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Sequence of advanced superimposition and superimposed control cancel
command

Fig. 8.10 (b)

When the M code for canceling superimposed control is specified and the superimposed control axis
selection signal OVLS is set to 0, superimposed control is canceled.

When the superimposed control axis selection signal becomes 0, the completion signal FIN is
operated for completion.

The waiting M code is specified in both the master and slave axis paths.

When the M code for turning the advanced superimposition mode off is specified and the AI contour
control permission signal OVLN is set to 0, the advanced superimposition mode signal OVLNS
becomes 0.

When the AI contour control permission signal OVLN becomes 0, the completion signal FIN is
operated for completion.

Parameter

8004

G8C

[Input type] Parameter input

[Data type] Bit path

Advanced
superimposition mode off
M command

Advanced superimposition
mode signal OVLNS

Completion signal
FIN

Strobe signal MF

AI contour control
permission signal OVLN

M code for canceling
superimposed control
cancel M command

Synchronous/composite/
superimposed control
under way signal SYN

Completion signal
FIN

Strobe signal MF

Axis selection signal
OVLS

Waiting between paths

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#3 G8C

In PMC axis control, advanced preview feed forward is :

Disabled.

Enabled.

Signal

Superimposed control axis selection signals OVLS1 to OVLS8 <Gn190>

[Classification] Input signal

[Function] These signals perform superimposed control.

[Operation] When one of these signals becomes 1, the control unit operates as follows:

Starts superimposed control with using the corresponding axis as the slave axis.

Uses an axis as the master axis following the setting in parameter No. 8186.

Synchronous/composite/superimposed control under way signals

SYN1O to SYN8O <Fn118>

[Classification] Output signal

[Function] These signals indicate that each axis is in the synchronous, composite, or superimposed

control mode.

[Output cond.] These signals become 1 under the following condition:

The corresponding axis is in the superimposed control mode.

These signals become 0 under the following condition:
-

The corresponding axis is not in the superimposed control mode.

AI contour control permission signal OVLN <Gn531.4>

[Classification] Input signal

[Function] This signal enables superimposed control in the AI contour control mode by advanced

superimposition.

[Operation] When this signal becomes 1, the control unit operates as follows:

The corresponding path enters the advanced superimposition mode.

When the AI contour control permission signal is changed to 1 or 0, the tool must stop
along all axes (other than PMC axes) in the target path. If the tool moves along any axis,
alarm DS0071 is issued.

Advanced superimposition mode signal OVLNS <Fn545.1>

[Classification] Output signal

[Function] This signal indicates the advanced superimposition mode.

[Output cond.] This signal becomes 1 under the following condition:

The corresponding path is in the advanced superimposition mode.

This signal becomes 0 under the following condition:
-

The corresponding path is not in the advanced superimposition mode.

Alarm and message

Number

Message

Description

PS0502

ILLEGAL G-CODE (SUPERIMPOSED
AHEAD)

A G code unavailable in the advanced superimposition
mode was specified.

DS0071

START OR RELEASE OF SUPERIMPOSED
AHEAD CANNOT BE DONE

To start or cancel the advanced superimposition mode,
the tool must be stopped along all axes.

DS0072

MANUAL REFERENCE RETURN CANNOT
BE DONE

In the advanced superimposition mode, manual
reference position return cannot be performed.

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Limitation

Manual reference position return

In the advanced superimposition mode, manual reference position return cannot be performed. If an
attempt is made to perform manual reference position return in the advanced superimposition mode, alarm
DS0072 is issued.

PMC axis control

In a system in which this function (AI contour control permission signal OVLN <Gn531.4>) is used, to
use PMC axis control, it is necessary to set bit 3 (G8C) of parameter No.8004 to 1. For details, refer to
“ADVANCED PREVIEW FEED FORWARD FOR PMC AXIS CONTROL”.

Others

The limitations on superimposed control and AI contour control are applied to this function. For basic
specifications of and limitations on superimposed control and AI contour control, see the explanation of
superimposed control and AI contour control in this manual.

8.11

PATH SPINDLE CONTROL

Overview

This function allows a workpiece attached to one spindle to be machined simultaneously with two tool
posts and each of two workpieces attached to each of two spindles to be machined simultaneously with
each of two tool posts.

Spindle

Tool post 1

Tool post 2

Fig. 8.11 (a) Application to a lathe with one spindle and two tool posts

Tool post 2

Spindle 1

Tool post 1

Spindle 2

Fig. 8.11 (b) Application to a lathe with two spindles and two tool posts

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The spindle belonging to each path can generally be controlled by programmed commands for the path.
With path spindle command selection signals, programmed commands for any path can control the
spindle belonging to any path.

When feed per revolution is performed on each path, the feedback pulses from the position coder attached
on the spindle belonging to the path are generally used. With path spindle feedback selection signals, feed
per revolution can be performed using the feedback pulses from the position coder attached on the spindle
belonging to any path.

NOTE

1 The spindle speed is changed by spindle commands from multiple paths

because path spindle command selection signals switch to spindle commands
from relevant paths. Create a PMC sequence which determines whether spindle
commands programmed for each path can be executed and switches over to
another path spindle command selection signal.

2 When multiple paths share one analog spindle, during execution of a thread

cutting command for a path, a function (such as thread cutting or feed per
revolution) which uses the feedback pulses from the spindle on another path
cannot be executed normally. Put restrictions so that during execution of thread
cutting on a path, feed per revolution and other functions are not executed for
the tool post on another path.

Explanation

•

Selecting spindle commands

Each path spindle command selection signal (input) can be used to switch over to spindle commands
for the relevant path that the spindle belonging to each path follows.

•

Selecting the feedback pulses from a position coder

When a serial spindle is used, each path spindle feedback selection signal (input) can be used to
switch over to the feedback pulses from the position coder attached on the spindle belonging to the
relevant path that each path uses in the NC. Thread cutting and feed per revolution using the spindle
belonging to a different path can be performed.

The following two signal types are available as selection methods using signals and each type is specified
by parameter setting as follows.

Bit 0 (2P2) of parameter No. 3703

Signal type

Signal type A

Signal type B

The using method and meaning of signals differ depending on the signal type. For details, see the
explanation of signals.

Each signal type is applicable to the following spindle configurations.

Signal type

Controlling the spindle belonging

to path 1 from path 1 or 2

Controlling the spindle belonging

to path 1 or 2 from path 1 or 2

Signal type A



Signal type B



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NOTE

When the path spindle control function is used, the spindle gear selection
method must be the T type.
For a machining center system, set bit 4 (GTT) of parameter No. 3706 to 1 to
select the T type as the spindle gear selection method.

When multiple spindles belong to individual paths

Multi-spindle control can be used simultaneously to issue spindle commands to any spindle belonging to
individual paths.
When multi-spindle control is not used, path spindle control is valid only for the 1st spindle belonging to
individual paths.

The following two methods are available for selecting spindle commands in multi-spindle control:
1)

Selecting spindle commands using signals (Bit 3 (MPP) of parameter No. 3703 is set to 0.)

Selecting spindle commands using address P (Bit 3 (MPP) of parameter No. 3703 is set to 1.)

When spindle commands are selected using address P, processing including path spindle command
selection is performed in a multipath system. For this reason, spindle command selection using signals is
invalid (this selection is made by spindle selection signals SWS1 to SWS4 <Gn027.0 to Gn027.2 and
Gn026.3> and path spindle command selection signals SLSPA <Gn063.2>, SLSPB <Gn063.3>, SLSPC
<Gn404.0>, and SLSPD <Gn404.1>).
Only one address P can be specified together with a spindle command and there is a one-to-one
correspondence between address P values and spindles. For this reason, a spindle command in the same
block cannot control multiple spindles simultaneously.

Selecting the feedback pulses from a position coder
The simultaneous use of multi-spindle control enables feed per revolution using the feedback pulses from
the position coder on any spindle belonging to each path. Use signals (combination of position coder
selection signal and path spindle feedback selection signal) to select the feedback pulses from a position
coder.

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