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FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 139

6. INTERPOLATION FUNCTION

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Number

Message

Description

PS0314

ILLEGAL SETTING OF
POLYGONAL AXIS

An axis was specified invalidly in polygon turning.
For polygon turning:

A tool rotation axis is not specified. (Parameter No. 7610)

For polygon turning with two spindles:

Valid spindles are not specified. (Parameter Nos. 7640 to 7643)
-

A spindle other than the serial spindle.

A spindle is not connected.

For concurrent use of polygon turning and polygon turning with two
spindles:

In the polygon turning mode, the value of parameter No.
7605 (selecting the type of polygon turning) was changed.

An attempt is made to use a spindle used for polygon
turning also for polygon turning with two spindles.

PS5018

POLYGON SPINDLE SPEED
ERROR

In G51.2 mode, the speed of the spindle or polygon synchronous
axis either exceeds the clamp value or is too small. The specified
rotation speed ratio thus cannot be maintained.
For polygon turning with two spindles:
More information as to why this alarm occurred is indicated in
diagnosis data No. 471.

Caution

CAUTION

1 The maximum spindle speed for each gear stage (Parameters No. 3741 to 3744)

must be specified correctly according to the model of the machine. In addition,
ordinary spindle connections must have been terminated.

2 This function uses the one-rotation signal for the spindle as a reference point for

phase adjustment.

When a built-in sensor is used, and there are gears between the spindle and
spindle motor, it is necessary to install a detector on the spindle separately to
take a one-rotation signal from the spindle. If the detector does not guarantee
detection of a correct position from arbitrary speed, set bit 4 (HST) of parameter
No. 7602 and bit 7 (RFCHK3) of serial spindle parameter No. 4016 to 1. This
setting reduces the spindle speed automatically down to 0 for spindle position
detection each time the polygon turning mode with two spindles is entered, thus
guaranteeing a correct phase relationship during polygon synchronization mode
with two spindles.

3 This function uses the spindle synchronization function for serial spindles.

(However, it does not require the spindle synchronization for the CNC.) You may
need to specify the relevant serial spindle parameters (such as Nos. 4032 to
4035 and Nos. 4065 to 4068).

Specify the same serial spindle loop gain (parameters Nos. 4065 to 4068) for
both spindles.

If the same serial spindle loop gain is not used for both spindles, polygon turning
may not be accurate.

If an attempt is made to perform polygon turning with two spindles using different
loop gain, bit 6(LGE) of diagnosis data No.470 becomes 1. (No alarm is issued.)

4 Before using the polygon synchronization mode, place both master axis and

polygon synchronization axis in the spindle control mode. If the polygon
synchronization mode starts during another mode (Cs contour control mode,
spindle orientation, or the like), an alarm occurs.

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CAUTION

5 During the polygon synchronization mode, no command cannot be executed for

the polygon synchronization axis.

During the polygon synchronization mode, the spindle orientation function cannot
be used for either the master axis and polygon synchronization axis. Therefore,
gear, tool or workpiece change is basically unusable during the polygon
synchronization mode.

6 During polygon synchronization mode, speed change and phase adjustment are

performed each time the spindle speed is changed. Therefore, this mode cannot
be used together with a function that causes continuous spindle speed change
(such as G96 constant surface speed control)

7 During the polygon synchronization mode, the rotation ratio between the master

axis and polygon synchronization axis is controlled with priority. Therefore, the
difference between the master axis speed and S command value may become
larger than during ordinary spindle control.

Note

NOTE

During the polygon synchronization mode, phase control is performed in the least
command increment of 360/4096 = 0.08789...(degrees) in reference to the
one-rotation signal for each spindle. A setting less that the least command
increment is actually invalid.

Since phase control covers relative phase of both spindles within a turn, a setting
greater than 360 degrees has no meaning.

This function does not limit the range of valid R settings. A setting greater than
360 degrees is assumed as the remainder of division by 360.

Reference item

Manual name

Item name

OPERATOR’S MANUAL (B-64694EN)

Polygon turning with two spindles

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6.9.3

Concurrent Use of Polygon Turning and Polygon Turning with
Two Spindles

Overview

When both of polygon turning and polygon turning with two spindles are specified, which polygon
turning option is used for each path can be selected using a parameter.

Fig. 6.9.3 (a) Example of performing polygon turning for path 1 and polygon turning with two spindles for

path 2

Explanation

Setting parameters

For a path for which bit 7 (PCG) of parameter No. 7604 is set to 1, whether to perform polygon turning or
polygon turning with two spindles can be selected by setting parameter No. 7605. For a path for which bit
7 (PCG) of parameter No. 7604 is set to 0, only polygon turning with two spindles can be performed.

Alarm

If the parameter for selecting the type of polygon turning is rewritten in the polygon turning mode, alarm
PS0314, “ILLEGAL SETTING OF POLYGONAL AXIS”, occurs. If an attempt is made to use a spindle
used for polygon turning also used for polygon turning with two spindles, alarm PS0314 occurs.

Example)

When polygon turning is performed in path 1, if polygon turning with two spindles with using the same
spindle is specified from path 2, alarm PS0314, “ILLEGAL SETTING OF POLYGONAL AXIS”,
occurs.

Parameter

7604

PCG

[Input type] Parameter input

[Data type] Bit path

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NOTE

When this parameter is set, the power must be turned off before
operation is continued.

#7 PCG

If both polygon turning with two spindles and polygon turning are specified:

Polygon turning with two spindles is performed.

Either of the options is enabled depending on the setting of parameter No. 7605.

7605

Polygon turning type selection

[Input type] Parameter input

[Data type] Byte path

[Valid data range] 0, 1

If both polygon turning with two spindles and polygon turning are specified, this
parameter can be used to select one of the options for use. A type of polygon turning is
selected according to the setting as follows:
0:

Polygon turning with two spindles

Polygon turning

If a value other than 0 or 1 is specified, 0 is assumed.

NOTE

Before re-setting this parameter, using the PMC window function or
the G10 command, cancel polygon turning (G50.2). In addition,
when re-setting this parameter, using the PMC window function,
use the M code preventing buffering.

Alarm and message

Number

Message

Description

PS0314

ILLEGAL SETTING OF
POLYGONAL AXIS

An axis was specified invalidly in polygon turning.
For polygon turning:

A tool rotation axis is not specified. (Parameter No. 7610)

For polygon turning with two spindles:

Valid spindles are not specified. (Parameter Nos. 7640 to 7643)
-

A spindle other than the serial spindle.

A spindle is not connected.

For concurrent use of polygon turning and polygon turning with two
spindles:

In the polygon turning mode, the value of parameter No.
7605 (selecting the type of polygon turning) was changed.

An attempt is made to use a spindle used for polygon
turning also for polygon turning with two spindles.

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6.10

NORMAL DIRECTION CONTROL

Overview

When a tool with a rotation axis (C-axis) is moved in the XY plane during cutting, the normal direction
control function can control the tool so that the C-axis is always perpendicular to the tool path (Fig. 6.10
(a): Sample Movement of the tool).

Tool

C-axis

Programmed tool path

Normal direction (in
which the tool moves)

Fig. 6.10 (a) Sample Movement of the tool

Movement of the tool inserted at the beginning of each block is executed at the feedrate set in parameter
No. 5481. If dry run mode is on at that time, the dry run feedrate is applied. If the tool is to be moved
along the X-and Y-axes in rapid traverse (G00) mode, the rapid traverse rate is applied.
If the feedrate of the C axis exceeds the maximum cutting feedrate of the C axis specified to parameter
No. 1430, the feedrate of each of the other axes is clamped to keep the feedrate of the C axis below the
maximum cutting feedrate of the C axis.

Parameter

1006

ROSx

ROTx

[Input type] Parameter input

[Data type] Bit axis

NOTE

When at least one of these parameters is set, the power must be
turned off before operation is continued.

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#0 ROTx

#1 ROSx

Setting linear or rotary axis.

ROSx

ROTx

Meaning

Linear axis
(1) Inch/metric conversion is done.
(2) All coordinate values are linear axis type. (Is not rounded in 0 to 360

)

(3) Stored pitch error compensation is linear axis type (Refer to parameter No.

3624)

Rotary axis (A type)
(1) Inch/metric conversion is not done.
(2) Machine coordinate values are rounded in 0 to 360

. Absolute coordinate

values are rounded or not rounded by bits 0 (ROAx) and 2 (RRLx) of
parameter No. 1008.

(3) Stored pitch error compensation is the rotation type. (Refer to parameter No.

3624)

(4) Automatic reference position return (G28, G30) is done in the reference

position return direction and the move amount does not exceed one rotation.

Rotary axis (B type)
(1) Inch/metric conversion is not done.
(2) Machine coordinate values, absolute coordinate values and relative

coordinate values are linear axis type. (Is not rounded in 0 to 360

(3) Stored pitch error compensation is linear axis type (Refer to parameter No.

3624)

(4) Cannot be used with the rotary axis roll-over function and the index table

indexing function (M series)

Except for the

above.

Setting is invalid (unused)

NOTE

Just a rotation axis can be subjected to normal direction control.

5480

Number of the axis for controlling the normal direction

[Input type] Parameter input

[Data type] Byte path

[Valid data range] 1 to the maximum controlled axis number

This parameter sets the controlled axis number of the axis for controlling the normal
direction.

5481

Feedrate of rotation of the normal direction controlled axis

[Input type] Parameter input

[Data type] Real axis

[Unit of data] deg/min

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

This parameter sets the feedrate of the movement along the normal direction controlled
axis that is inserted at the start point of a block during normal direction control.

5482

Limit value used to determine whether to ignore the rotation insertion of the normal direction controlled

axis

[Input type] Parameter input

[Data type] Real path

[Unit of data] deg

[Min. unit of data] Depend on the increment system of the reference axis

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[Valid data range] 0 or positive 9 digit of minimum unit of data (refer to the standard parameter setting table

(B))
The rotation block of the normal direction controlled axis is not inserted when the
rotation insertion angle calculated during normal direction control does not exceed this
setting.
The ignored rotation angle is added to the next rotation insertion angle, and the block
insertion is then judged.

NOTE

1 No rotation block is inserted when 360 or more degrees are set.
2 If 180 or more degrees are set, a rotation block is inserted only

when the circular interpolation setting is 180 or more degrees.

5483

Limit value of movement that is executed at the normal direction angle of a preceding block

[Input type] Parameter input

[Data type] Real path

[Unit of data] mm, inch (input unit)

[Min. unit of data] Depend on the increment system of the reference axis
[Valid data range] 0 or positive 9 digit of minimum unit of data (refer to standard parameter setting table (B)

Tool center path

Travel
distance

Programmed path

For straight line
When the travel distance of N2 in the figure
on the left does not exceed the setting, block
N2 is machined with the tool being normal to
block N1.

Diameter

Programmed path

Tool center path

For arc
When the arc diameter of N2 in the figure on
the left does not exceed the setting, arc N2
is machined with the tool being normal to
block N1. A normal direction axis is not
controlled to move in the normal direction
according to the arc movement.

Fig. 6.10 (b)

1430

Maximum cutting feedrate for each axis

[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)
Specify the maximum cutting feedrate for each axis.
The cutting feed rate is clamped so that the feedrate in the tangent direction does not
exceed the parameter setting.

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Alarm and message

Number

Message

Description

PS1470

G40.1 –G42.1 PARAMETER MISS

A parameter setting related to normal direction control is
illegal.
The axis number of a normal direction controlled axis is set in
parameter No. 5480, but that axis number is in the range of
the number of controlled axes.
The axis set as a normal direction controlled axis is not set as
a rotation axis (bit 0 (ROTx) of parameter No. 1006) = 1 and
No.1022=0).

PS1471

ILLEGAL COMMAND IN G40.1
–G42.1

An invalid G code was specified in the normal direction control
mode.

Limitation

NOTE

1 Do not specify any command to the C axis during normal direction control. Any

command specified at this time is ignored.

2 Before processing starts, it is necessary to correlate the workpiece coordinate of

the C axis with the actual position of the C axis on the machine using the
coordinate system setting (G92) or the like.

3  Helical cutting cannot be specified in the normal direction control mode.
4  Normal direction control cannot be performed by the G53 move command.
5  The C-axis must be a rotation axis.
6  The following functions must be commanded with normal direction control cancel

mode.

-  Plane selection command
-  Spiral interpolation
-  Conical interpolation
-  AI contour control

NOTE

In the normal direction control mode, the following commands cannot be issued.
An attempt to issue any of them results in alarm PS1471 being raised.
- Plane selection command (G17, G18, G19)
- Automatic reference position return(G28)
- 2nd/3rd/4th reference position return(G30)
- Move from the reference position (G29)

6.11

LINEAR INTERPOLATION (G28, G30, G53)

Overview

When positioning operation of linear interpolation type is specified (bit 1 (LRP) of parameter No. 1401 =
1), the following operations can also be set as operations of linear interpolation type by setting bit 4
(ZRL) of parameter No. 1015 to 1:
-

Movement from an intermediate point to a reference position in automatic reference position return
operation (G28)

Movement from an intermediate point to a reference position in second, third, or fourth reference
position return operation (G30)

Positioning by machine coordinate system selection (G53)

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