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

10. SPINDLE SPEED FUNCTION

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G25 mode, valid state of the parameters of spindle speed fluctuation detection is held. After that, when
mode is change into G26 mode again, this valid state is applied. Examples are shown below.

NOTE

Alarm PS1305 is issued because value of specified address P, Q, R, I in the
machining program is out of valid data range. At this time, about address of
value out of valid data range, if type of parameters Nos. 4921 to 4924 (dp, dq,
dr, di) are valid before machining program, type of parameters Nos. 4921 to
4924 (dp, dq, dr, di) are still valid.

Signal

Spindle speed fluctuation detection alarm signal SPAL <Fn035.0>

[Classification] Output signal

G25 mode

G26 mode

○

G26 Rr Ii ;

G25 mode

○

G26 mode

○

(Example 4)

clear

(bit 0 (G26) of parameter No.4902 is set to 1)

G25 mode

○

G26 mode

○

G25 ;

G25 mode

○

G26 mode

G26 ;

G25 mode

○

G26 mode

○

G25 mode

○

G26 mode

○

G25 ;

G25 mode

○

G26 mode

G25 mode

○

G26 mode

○

(Example 3)

clear

(bit 0 (G26) of parameter No.4902 is set to 1)

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[Function] This signal indicates that the actual spindle speed is not within a tolerance to the specified

speed.

[Output cond.] The signal becomes logical “1” when:

The actual spindle speed goes out of tolerance to the specified speed.

The signal becomes logical “0” when:
-

No alarm OH0704 condition has been detected for spindle speed fluctuation.

An alarm condition is cleared by resetting the NC when the signal is logical 1.

Signal address

Fn035

SPAL

Parameter

4900

FDTs

UDPs

FDEs

FLRs

[Input type] Parameter input

[Data type] Bit spindle

#0 FLRs

When the spindle speed fluctuation detection function is used, the unit of parameters No.

4911(q), No. 4912(r), No. 4921(dq), No. 4922(dr) and diagnoses No. 1591, No. 1592
(allowable ratio and fluctuation ratio) is:
0:

1%.

0.1%.

#4 FDEs

Spindle speed fluctuation detection function is:

Enabled.

Disabled.

If the position coder selection signal is selected for a spindle for which this parameter is 1,
the target spindle of spindle speed fluctuation detection remains unchanged. Spindle
speed fluctuation detection stays enabled for the spindle for which spindle speed
fluctuation detection was enabled before the selection of the position coder selection
signal.
An example is given below.
[Example]

Bit 4 (FDE) of parameter No.4900 (Workpiece spindle) = 0

Bit 4 (FDE) of parameter No.4900 (Tool spindle) = 1

Even when the position coder selection signal is switched from the workpiece
spindle to the tool spindle, the target spindle of spindle speed fluctuation detection
remains unchanged, that is, the function stays enabled for the workpiece spindle.

Workpiece

spindle

Tool spindle

Selected-

spindle

PCS

Workpiece

spindle

Tool spindle

Selected-

spindle

PCS

Spindle speed fluctuation

detection is enabled for the

workpiece spindle.

Spindle speed fluctuation

detection is enabled for the

workpiece spindle.

Note) The selected spindle varies depending on the state of the position coder selection

signal.

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NOTE

1 If bit 4 (FDE) of parameter No.4900 is 0 for all spindles, spindle

speed fluctuation detection is enabled for the spindle selected with
the position coder selection signal as is conventionally. If the bit 4
(FDE) of parameter No.4900 is 1 for all spindles, spindle speed
fluctuation detection is enabled for the spindle selected with the
position coder selection signal.

2 When the bit 4 (FDE) of parameter No.4900 is 0 for all spindles,

setting the bit 4 (FDE) of parameter No.4900 for the spindle
selected with the position coder selection signal to 1 does not
cause an immediate change to the target spindle, which stays as
the target until the next position coder selection signal is issued.

3 If the bit 4 (FDE) of parameter No.4900 for the first spindle is 1 and

the first spindle is the tool spindle when the power is turned on,
spindle speed fluctuation detection remains enabled for the first
spindle until a spindle for which the bit 4 (FDE) of parameter
No.4900 is 0 is selected.

#6 UDPs

About parameters of spindle speed fluctuation detection at power-on:

Parameters Nos. 4911 to 4914 (p, q, r, i) are valid.

Parameters Nos. 4921 to 4924 (dp, dq, dr, di) are valid.

NOTE

This parameter (UDPs) is referenced at only power-on. So, even
when this parameter (UDPs) is changed after power-on, valid
parameters about spindle speed fluctuation detection are not
changed.

#7 FDTs

Spindle speed fluctuation detection is started:

When the actual spindle speed reaches a specified range or when the time specified
with valid parameter (p(No.4914) or dp(No.4924)) elapses.

When the time specified with valid parameter (p(No.4914) or dp(No.4924)) elapses.

4902

G26

[Input type] Parameter input

[Data type] Bit path

#0 G26

When power is turned on or when the control is cleared:

G25 mode (spindle speed fluctuation detection is disabled) is selected.

G26 mode (spindle speed fluctuation detection is enabled) is selected.

4911

Allowable speed ratio (q) used to assume that the spindle has reached a specified speed

[Input type] Parameter input

[Data type] Word spindle

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, set an allowable speed
ratio (q) used to assume that the spindle has reached a specified speed.

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NOTE

The unit of data is determined by bit 0 (FLR) of parameter No.
4900.

4912

Spindle speed fluctuation ratio (r) for not issuing a spindle speed fluctuation detection alarm

[Input type] Parameter input

[Data type] Word spindle

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, set a spindle speed
fluctuation ratio (r) for not issuing an alarm.

NOTE

The unit of data is determined by bit 0 (FLR) of parameter No.
4900.

4913

Spindle speed fluctuation width (i) for not issuing a spindle speed fluctuation detection alarm

[Input type] Parameter input

[Data type] 2-word spindle

[Unit of data] min

-1

[Valid data range] 0 to 99999

When the spindle speed fluctuation detection function is used, set an allowable
fluctuation width (i) for not issuing an alarm.

4914

Time (p) from the change of a specified speed until spindle speed fluctuation detection is started

[Input type] Parameter input

[Data type] 2-word spindle

[Unit of data] msec

[Valid data range] 0 to 999999

When the spindle speed fluctuation detection function is used, set a time (p) from the
change of a specified speed until spindle speed fluctuation detection is started. In other
words, spindle speed fluctuation detection is not performed until a set time has elapsed
after a specified speed is changed. However, when the actual spindle speed is assumed to
have reached a specified value within a set time (p), spindle speed fluctuation detection is
started.

4921

Allowable speed ratio (dq) used to assume that the spindle has reached a specified speed (at

power-on)

[Input type] Parameter input

[Data type] Word spindle

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, set an allowable speed
ratio (dq) used to assume that the spindle has reached a specified speed. To validate this
parameter, it is necessary to set bit 6 (UDPs) of parameter No.4900 to 1. Then, at
power-on, parameter No.4911 (q) is invalid, and parameter No.4921 (dq) is valid.

10. SPINDLE SPEED FUNCTION

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NOTE

1 If address Q is specified in the G26 block after power-on,

parameter No.4921 (dq) becomes invalid, and parameter No.4911
(q) becomes valid. If address Q is not specified in the G26 block
after power-on, parameter No.4921 (dq) is still valid. Also, When
alarm PS1305 is issued because specified address Q value is out
of valid data range, parameter No.4921 (dq) is still valid.

2 The unit of data is determined by bit 0 (FLR) of parameter No.4900.

4922

Spindle speed fluctuation ratio (dr) for not issuing a spindle speed fluctuation detection alarm (at

power-on)

[Input type] Parameter input

[Data type] Word spindle

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, set a spindle speed
fluctuation ratio (dr) for not issuing an alarm. To validate this parameter, it is necessary to
set bit 6 (UDPs) of parameter No.4900 to 1. Then, at power-on, parameter No.4912 (r) is
invalid, and parameter No.4922 (dr) is valid.

NOTE

1 If address R is specified in the G26 block after power-on,

parameter No.4922 (dr) becomes invalid, and parameter No.4912
(r) becomes valid. If address R is not specified in the G26 block
after power-on, parameter No.4922 (dr) is still valid. Also, When
alarm PS1305 is issued because specified address R value is out
of valid data range, parameter No.4922 (dr) is still valid.

2 The unit of data is determined by bit 0 (FLR) of parameter No.4900.

4923

Spindle speed fluctuation width (di) for not issuing a spindle speed fluctuation detection alarm (at

power-on)

[Input type] Parameter input

[Data type] 2-word spindle

[Unit of data] min

-1

[Valid data range] 0 to 99999

When the spindle speed fluctuation detection function is used, set an allowable
fluctuation width (di) for not issuing an alarm. To validate this parameter, it is necessary
to set bit 6 (UDPs) of parameter No.4900 to 1. Then, at power-on or cleared state,
parameter No.4913 (i) is invalid, and parameter No.4923 (di) is valid.

NOTE

If address I is specified in the G26 block after power-on, parameter
No.4923 (di) becomes invalid, and parameter No.4913 (i) becomes
valid. If address I is not specified in the G26 block after power-on,
parameter No.4923 (di) is still valid. Also, When alarm PS1305 is
issued because specified address I value is out of valid data range,
parameter No.4923 (di) is still valid.

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10. SPINDLE SPEED FUNCTION

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4924

Time (dp) from the change of a specified speed until spindle speed fluctuation detection is started (at

power-on)

[Input type] Parameter input

[Data type] 2-word spindle

[Unit of data] msec

[Valid data range] 0 to 999999

When the spindle speed fluctuation detection function is used, set a time (dp) from the
change of a specified speed until spindle speed fluctuation detection is started. In other
words, spindle speed fluctuation detection is not performed until a set time has elapsed
after a specified speed is changed. However, when the actual spindle speed is assumed to
have reached a specified value within a set time (dp), spindle speed fluctuation detection
is started. To validate this parameter, it is necessary to set bit 6 (UDPs) of parameter
No.4900 to 1. Then, at power-on, parameter No.4914 (p) is invalid, and parameter
No.4924 (dp) is valid.

NOTE

If address P is specified in the G26 block after power-on,
parameter No.4924 (dp) becomes invalid, and parameter No.4914
(p) becomes valid. If address P is not specified in the G26 block
after power-on, parameter No.4924 (dp) is still valid. Also, When
alarm PS1305 is issued because specified address P value is out
of valid data range, parameter No.4924 (dp) is still valid.

Diagnosis data

1590

The index number of the spindle axis that is subjected to spindle speed fluctuation detection

[Data type] 2-word path

The index number of the spindle axis that is subjected to spindle speed fluctuation
detection is indicated.

1591

Allowable speed ratio used to assume that the spindle has reached a specified speed

[Data type] Word path

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, allowable speed ratio used
to assume that the spindle has reached a specified speed is indicated.

NOTE

The unit of data is determined by bit 0 (FLR) of parameter No.
4900.

1592

Spindle speed fluctuation ratio for not issuing a spindle speed fluctuation detection alarm

[Data type] Word path

[Unit of data] 1%, 0.1%

[Valid data range] 1 to 100, 1 to 1000

When the spindle speed fluctuation detection function is used, spindle speed fluctuation
ratio for not issuing an alarm is indicated.

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NOTE

The unit of data is determined by bit 0 (FLR) of parameter No.
4900.

1593

Spindle speed fluctuation width for not issuing a spindle speed fluctuation detection alarm

[Data type] 2-word path

[Unit of data] min

-1

[Valid data range] 0 to 99999

When the spindle speed fluctuation detection function is used, allowable fluctuation
width for not issuing an alarm is indicated.

1594

Time from the change of a specified speed until spindle speed fluctuation detection is started

[Data type] 2-word path

[Unit of data] msec

[Valid data range] 0 to 999999

When the spindle speed fluctuation detection function is used, time from the change of a
specified speed until spindle speed fluctuation detection is started is indicated. In other
words, spindle speed fluctuation detection is not performed until a set time has elapsed
after a specified speed is changed. However, when the actual spindle speed is assumed to
have reached a specified value within a set time, spindle speed fluctuation detection is
started.

NOTE

Diagnosis data Nos.1590 to 1594 are "0" when spindle speed fluctuation
detection function is disabled as follows.
-  G25 mode
-  There is no spindle selected with the spindle speed fluctuation detection
-  The specified spindle speed is 0 min

-1

- A search by program restart is in progress.
- Spindle is under other than velocity control

Alarm and message

Number

Message

Description

OH0704

OVERHEAT:SPINDLE

Spindle is overheated by the spindle speed fluctuation
detection function.
<1> For heavy cutting, ease the cutting conditions.
<2> Check whether the cutter has been blunted.
<3> Check whether the spindle amplifier is malfunctioning.

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Number

Message

Description

PS5305

ILLEGAL SPINDLE NUMBER

In a spindle select function by address P for a
multiple-spindle
control,
1) Address P is not specified.
2) Parameter No. 3781 is not specified to the spindle to be

selected.

3) An illegal G code which cannot be commanded with an

S_P_; command is specified.

4) The multi-spindle control cannot be used because the bit

1 (EMS) of parameter No. 3702 is 1.

5) The spindle amplifier number of each spindle is not set in

parameter No. 3717.

6) A prohibited command for a spindle was issued

(parameter No. 11090).

7) An invalid value is set in parameter No. 11090.

Note

NOTE

1 Even if the conditions to start the spindle speed fluctuation detection function are

satisfied, the spindle speed fluctuation detection function is not performed under
the following conditions:

- The specified spindle speed is 0 min

-1

- A search by program restart is in progress.

2 If the spindle stop signal *SSTP<Gn029.6> is set to “0”, detection is not

performed.

3 If any of the spindle stop signals *SSTP1 to *SSTP4<Gn027.3, Gn027.4,

Gn027.5, Gn026.6> is set to “0”, detection is not performed on the
corresponding spindle.

4 If alarm OH0704 "OVERHEAT:SPINDLE" is raised, a single-block stop occurs in

automatic operation. The spindle overheat alarm is displayed on the screen. In
addition, the spindle speed fluctuation detection alarm signal SPAL is output (the
signal is set to “1” in the alarm state).

This signal is cleared to “0” by a reset.

5 If the cause of alarm OH0704 is not eliminated by a reset, the alarm will be

raised again.

6 Alarm OH0704 can be suppressed across an allowable variation width specified

in parameter No.4913. If the actual spindle speed continues to be 0 min

-1

for one

second or longer, however, an alarm will be raised.

7 The raising of alarm OH0704 does not automatically cause the spindle to stop.
8 G25 and G26 must be specified in a predetermined format. Avoid specifying the

preparatory function, auxiliary functions, and the like together with G25 or G26.

9 A serial spindle signal that can affect the actual spindle speed should be

manipulated in the G25 mode.

10 If a spindle is under velocity control, spindle speed fluctuation detection is carried

out.

11 Avoid making a spindle orientation operation while the spindle speed fluctuation

detection function is enabled.

12 If address P is used to select a spindle while the multi-spindle control is carried

out, avoid specifying S_P_; together with G26. If this is attempted, alarm
PS5305 will be raised.

FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 228