
9.STOP AND EMERGENCY STOP B-63943EN/02
- 282 -
9.4 STOPPING THE SERVO MOTOR
Shutting off the motor power brings the servo motor to a dynamic
brake stop. A dynamic brake stop is braking performed by
separating the synchronous rotator from the driving power, and
consuming generated electric energies with the coil as well as the
built-in resistor of the servo amplifier. With this function, shutting
off the motor power does not allow the servo motor to coast like the
spindle motor.
Servo motor stop mode depends on the type of a CNC alarm.
Example)
1. PS alarm caused by an NC program error or the like
The motor power is not shut off.
2. CNC fan stop
A single-block stop is made. The motor power is not shut off.
3. Emergency stop state
A dynamic stop is made as a rule. By setting relevant
parameters, however, it is also possible to decelerate the servo
motor to a stop, and then to shut off the servo motor power.
4. System alarm
A dynamic brake stop is made.
If the servo motor cannot be controlled, a dynamic brake stop is
unconditionally made.