
B-63494EN/02 11.APPLYCATION OF OTHER FUNCTIONS
- 187 -
11.3.2 Specifications
Switching control
Spindle output control function by the PMC can be used to specify the
following:
• Spindle motor speed (number of rotations)
• Output polarity for each spindle motor (direction of rotation)
Usually, the CNC is used to control the speed and polarity of the first
spindle motor. If a multi-spindle control function is added, the CNC
can also control the second spindle motor.
Spindle output control by the PMC can be used to specify that either
the CNC or the PMC is used to set each of the spindle motor speed
and output polarity.
If TYPE-A is specified (bit 2 of parameter No. 3709 is 0) when
multi-spindle control is used, signals for the second spindle cannot be
used.
Specifying the spindle motor speed
The PMC can be used to specify the spindle motor speed upon
executing the following:
• Switching the controller from the CNC to the PMC, by issuing
SINDx signal
• Setting the spindle motor speed data, calculated by the PMC, in
spindle control signals R01Ix to R12Ix
When controlled by the PMC, the spindle motor speed is not affected
by any signal (for example, the spindle speed override signal) or
parameter settings (for example, the maximum speed clamp
parameter) related to the spindle speed command of the CNC spindle
control function. However, the individual spindle stop signals
(*SSTPx <G027#3, #4>) during use of multi-spindle control are
enabled.
The spindle motor speed data is obtained from the following
expression. Its value can range from 0 to 4095:
Spindle motor speed data =
(Spindle motor speed/Maximum spindle motor speed)×4095
Normally, the speed of the spindle is actually controlled. If a gear train
is used to connect the spindle to the spindle motor, first obtain the
maximum spindle speed at the maximum spindle motor speed.
Spindle motor speed data =
(Spindle speed/Maximum spindle speed)×4095
By using this expression, the spindle motor speed data can easily be
obtained.
Specifying the output polarity for the spindle motor
The PMC can specify the spindle motor output polarity when the
following are executed:
• Switching the controller from the CNC to the PMC, by issuing an
SSINx signal
• Specifying the output polarity to the SGNx signal