FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 190

10. SPINDLE SPEED FUNCTION

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Used when the spindle switching function is not used, or used for the main spindle when
the spindle switching function is used.

NOTE

This parameter is invalid when an extended spindle name is used.

3799

NDPs

[Input type] Parameter input

[Data type] Bit spindle

#1 NDPs

When an analog spindle is used, a position coder disconnection check is:

Made.

Not made.

(This parameter is valid when bit 0 (NAL) of parameter No. 3799 is set to 0.)
When no position coder is used with an analog spindle, set this parameter to 1.

Alarm and message

Number

Message

Description

SP1241

D/A CONVERTER ERROR

The D/A converter for controlling analog spindles is
erroneous.

SP1996

ILLEGAL SPINDLE PARAMETER
SETTING

The spindle was assigned incorrectly. Check to see the
following parameter. (No.3716 or 3717)

10.4

SERIAL/ANALOG SPINDLE CONTROL

Overview

Serial/analog spindle control allows an analog spindle to be used as one of the controlled spindles in the
entire system. Only spindle speed command control and spindle speed command control by the PMC can
be used.

NOTE

1 When using a serial spindle, set bit 5 (SSN) of parameter No. 8133 to 0.
2 The analog spindle must be assigned to the last of the spindle configuration.

Explanation

Serial/analog spindle control allows only one analog spindle to be used as one of the controlled spindles
in the entire system. The analog spindle used must be assigned to the last spindle of the spindle
configuration.

Spindle functions available in serial/analog spindle control

The table below lists the relationship between the spindles and functions:

Spindle

Function

Serial spindle

(NOTE 1)

Analog spindle

Threading/feed per revolution (synchronous feed)

Available

Unavailable

Constant surface speed control

Available

Unavailable

Spindle speed fluctuation detection

Available

Unavailable

Actual spindle speed output (T series)

Available

Unavailable

Spindle positioning (T series)

Available

Unavailable

Cs contour control

Available

Unavailable

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Spindle

Function

Serial spindle

(NOTE 1)

Analog spindle

Rigid tapping

Available

Unavailable

Spindle synchronous control

Available

Unavailable

Simple spindle synchronous control

Available

Unavailable

Spindle control unit functions, such as spindle
orientation, spindle output switching, and spindle
switching

(NOTE 2)

Available

Polygon machining (T series)
(using the servo motor axis and spindle)

Available

Unavailable

Polygon machining with two spindles (T series)
(Spindle and spindle polygon)

Available

Unavailable

Spindle output control by the PMC

Available

NOTE

1 When using a serial spindle, set bit 5 (SSN) of parameter No. 8133 to 0.
2 These functions belong to the spindle control unit. They cannot be used unless

the spindle control unit supports these functions.

Connection example

Connect the analog spindle to JA40.
When an analog spindle is used under serial/analog spindle control, a position coder cannot be attached to
the analog spindle.
For connection of serial spindles, refer to CONNECTION MANUAL (Hardware) (B-64603EN).

- When connecting one serial spindle and one analog spindle (when the

maximum number of controllable spindles is two)

CNC

Motor No. 1 (serial)

Motor No. 2 (analog)

JA41

JA40

Restrictions

When an analog spindle is used under serial/analog spindle control, there are restrictions as follows:

Be sure to assign the analog spindle as the last spindle of the controlled spindles.
Example:

When there are two controlled spindles, and one of these spindles is an analog spindle

The controlled spindle number of the analog spindle is 2.

Set the spindle amplifier number of the analog spindle (parameter No. 3717) to 2.

A position coder cannot be installed.

Only spindle speed command control and spindle speed command control by the PMC can be used.
Other control and spindle functions cannot be used.

Parameter

3702

EMS

[Input type] Parameter input

[Data type] Bit path

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#1 EMS

The multi-spindle control is:

Used.

Not used.

NOTE

Make the setting on the side of the path in which multi-spindle
control is unnecessary in 2-path control.

3716

A/Ss

[Input type] Parameter input

[Data type] Bit spindle

NOTE

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

#0 A/Ss

Spindle motor type is :

Analog spindle.

Serial spindle.

NOTE

1  A maximum of one analog spindle can be controlled.
2  To use a serial spindle, set bit 5 (SSN) of parameter No. 8133 to 0.
3  When using an analog spindle, assign it at the end of the spindle

configuration.

3717

Motor number to each spindle

NOTE

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

[Input type] Parameter input

[Data type] Byte spindle

[Valid data range] 0 to Maximum number of controlled axes

Set a spindle amplifier number to be assigned to each spindle.
0:

No spindle amplifier is connected.

Spindle motor connected to amplifier number 1 is used.

Spindle motor connected to amplifier number 2 is used.

Spindle motor connected to amplifier number 3 is used.

NOTE

When using an analog spindle, assign it at the end of the spindle
configuration.
(Example)

When there are three spindles in an entire system (two serial
spindles and one analog spindle), set the spindle amplifier
number (this parameter) of the analog spindle to 3.

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3718

Subscript for display of a serial spindle or analog spindle

[Input type] Parameter input

[Data type] Byte spindle

[Valid data range] 0 to 122

Set a subscript to be added to spindle speed display on a screen such as the position
display screen.

3798

ALM

[Input type] Parameter input

[Data type] Bit

#0 ALM

The spindle alarm (SP****) for all spindles is:

Enabled.

Ignored.

When this parameter is set to 1, the spindle-related alarms are ignored. So, be sure to set
this parameter to 0 at all times except for special cases such as maintenance.

3799

NDPs

NALs

[Input type] Parameter input

[Data type] Bit spindle

#0 NALs

An alarm detected on the spindle amplifier side is:

Displayed.

Not displayed.

(This parameter is valid when bit 0 (ALM) of parameter No. 3798 is set to 0.)
When this parameter is set to 1, an alarm detected on the spindle amplifier side is ignored.
So, be sure to set this parameter to 0 at all times except for special cases such as
maintenance.

#1 NDPs

When an analog spindle is used, a position coder disconnection check is:

Made.

Not made.

(This parameter is valid when bit 0 (NAL) of parameter No. 3799 is set to 0.)
When no position coder is used with an analog spindle, set this parameter to 1.

NOTE

When an analog spindle is used simultaneously with serial spindle
by serial/analog spindle control, a position coder cannot be used as
the analog spindle. Be sure to set this parameter to 1.

8133

SSN

[Input type] Parameter input

[Data type] Bit

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NOTE

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

#5 SSN

Spindle serial output is:

Used.

Not Used.

Set this parameter as shown below depending on the spindle configuration.

Spindle configuration

Parameter SSN

When all spindles in the entire system are serial spindles

When serial spindles and analog spindles are mixed in the entire system

When all spindles in the entire system are analog spindles

10.5

SPINDLE SPEED CONTROL

Explanation

This section explains the following in relation to spindle speed control:

•

Command flow in spindle speed control

•

Processing for gear change (M and T type gear selection methods)

•

Position coder feedback signal

•

Speed arrival signal (SAR)

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Command flow of spindle speed control

The following Fig. 10.5 (a) summarizes spindle speed control.

←

From the PMC

Output to the PMC
(used for ladders)

Switching in the machine

←

From the PMC

←

From the PMC

←

From the PMC

Machining program, etc.

↓

- Processing for gear change
(S command

→

spindle motor speed conversion)

Clamp the speed according to parameters.

- Command output to the spindle,

spindle enable signal output,
gain, and offset

Gear select signal output (M series)
(GR3O, GR2O, GR1O)

- Spindle stop signal/spindle orientation signal
- Spindle override signal (*SSTP/SOR, SOV0 to SOV7)

Input the gear select signal
(GR1, GR2) (T type)

CNC output specification (result of speed conversion)
S12 bit code output (R12O to R01O)

Specify output polarity in the CNC.
(M03/M04 and parameter No. 3706 = TCW, CWM)

Thread cutting,
feed per revolution,
etc.

- Position coder

feedback signal

Sensors

Input the spindle amplifier
control signal from the PMC,

- S command

S code/SF signal output

- Determine the output.

←

Output specification by the PMC

(Selected by the SIND signal)

(set to R12I to R01I)

- Determination of output polarity

←

Polarity specification by the PMC

(Selected by the SSIN signal)

(set to SGN)

Control over the
start of cutting
feed.

Input the spindle
speed arrival
signal (SAR).

Monitor the arrival spindle
speed

Spindle
amplifier

Spindle
motor

Position
coder

Gear change
mechanism

Spindle

Mechanical section of the machine

CNC

PMC and machine

Output to the PMC
(to change the machine gear).

Output to the PMC
(to be used for ladders).

←

Fig. 10.5 (a)

S command

The S command specifies the spindle speed entered from machining programs, etc. for the CNC.
For constant surface speed control (during G96 mode), the CNC converts the specified surface speed to
the spindle speed.

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When the M type gear selection method is used (a machining center is used, the constant surface speed
control is not provided (bit 0 (SSC) of parameter No. 8133 is 0), and bit 4 (GTT) of parameter No. 3706
is 0), the CNC determines the necessary gear stage for obtaining a certain spindle speed according to the
settings in parameters Nos. 3741, 3742, 3743, and so on and the S command value, and posts the gear
stage to the PMC.
(GR3O, GR2O, GR1O<Fn034.2, Fn034.1, Fn034.0>)

S code/SF signal output

With the spindle serial output (bit 5 (SSN) of parameter No. 8133 is 0), the spindle control function in the
CNC converts the S command value to the output value for the spindle motor. For correspondence to gear
change and constant surface speed control, the S code/SF signals output is different as follows in case of
the spindle serial output and spindle analog output are not used.

M series

→

Outputs the S code.

The SF signal is output only when the CNC directs the PMC to change the gear.

T series

→

Outputs neither S code nor SF signal.

(This is because the S code is not always the spindle speed when the constant surface speed control
is used.)

If you use the S code and SF signal for processing in the PMC ladder, you must specify parameters
related to parameter No. 3705.

Spindle stop signal (*SSTP)

When the CNC performs spindle speed control, the speed command output to the spindle is set to “0” by
this signal. Setting this signal to “0” stops the spindle.
To enable speed commands to be issued to the spindle, set this signal to “1”.

Spindle orientation signal (SOR)

If the spindle orientation signal is logical 1 and the spindle stop signal is logical 0, the spindle rotates in
the direction specified by bit 5 (ORM) of parameter No. 3706 at a constant speed specified by parameter
No. 3732.
Because the spindle rotates at a constant speed regardless of the gear stage, this signal can be used to
rotate the spindle to drive the stopper or pin during mechanical spindle positioning.

For the machining center system, setting bit 1 (GST) of parameter No. 3705 enables the spindle motor to
rotate at a constant speed. This function can be used for gear shifting because it maintains a constant
speed of the gear change mechanism.

Spindle speed override signal (SOV00 to SOV07)

This signal specifies an override of 0% to 254% for the specified S value for spindle control.
However, the spindle speed override function is disabled when the CNC is in the following state:
Tapping cycle (M series : G84, G74 T series : G84, G88)
Thread cutting (M series : G33 T series : G32, G92, and G76)
When the spindle speed control is performed but the spindle speed override is not used, set the override
value to 100%.

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Processing for gear changing

Although the S command contains the spindle speed, the object that is actually controlled is the spindle
motor. Therefore, the CNC must have some provision to detect the gear stage between the speed and
spindle motor.
There are two types of gear selection methods:

M type (for the machining center system only)
The CNC selects a gear stage according to the range of speed for each gear stage previously specified in a
parameter, as directed by the S command, and informs the PMC of the selected gear stage (one of the
three gear stages ) using the gear select signal output (GR3O, GR2O, GR1O).
Also, the CNC outputs the spindle speed based on the selected gear stage (output as the gear select
signal).

T type
The gear stage to be used is determined on the machine side, and the gear stage is input using the gear
selection signals (GR1 and GR2) (one of the four gear stages).
The CNC outputs the appropriate speed command for the selected gear range.

Selection of gear change system

The machining center system can use either M or T type.
M type

→

Without constant surface speed control, and bit 4 (GTT) of parameter No. 3706 = 0

T type

→

With constant surface speed control, or bit 4 (GTT) of parameter No. 3706 = 1

NOTE

The M type gear selection method cannot be selected when one of the following
functions is used:

- Constant surface speed control

- Multi-spindle control

- Extended spindle name

- Spindle control between paths

The lathe system can use only T type.

M type gear selection method

By specifying from s0 to S99999 in memory or MDI operation, the CNC outputs a command
corresponding to the spindle speed. There is a two-speed (GR1O and GR2O) or three-speed range (GR1O,
GR2O, GR3O), set by parameters Nos. 3741-3743, and the gear selection signal is output simultaneously.
When the gear selection signal is changed, the SF signal is output at the same time.
By setting bit 6 (SFA) of parameter No. 3705, SF can also be output regardless of gear change.
The meaning of the gear signals is Table 10.5 (a):

Table 10.5 (a)

Gear selection

signals

Gear 2-stage

Gear 3-state

Remarks

GR1O

Low

: Low Gear

Middle : Middle Gear
High

: High Gear

GR2O

High

Middle

GR3O

High

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