5-28
COMMON PARAMETER SETTING
- SV Series User’s Manual -
5-5 Electromagnetic Brake Setting
Electromagnetic brake is used to prevent movable parts of the machine from moving due to its own weight or an
external force when power of the servo amplifier power is OFF.
It is mounted in the servo motor with an electromagnetic brake.
For wiring of the electromagnetic brake, see "4-4 Wiring Servo Motor", Page 4-11.
In addition, for the pulse/analog input type servo amplifier, be sure to assign the "Electromagnetic brake timing
(BRAKE)" to any terminal. For signal assignment, see "5-3 I/O Signal Setting", Page 5-18.
The electromagnetic brake is a brake especially used for holding, and it should not be used for braking
purpose. It can only be used to hold stop status of the servo motor.
Sequence Control Program for Brake Operation
The electromagnetic brake has a operation delay time, so be sure to use the following sequence control program.
*1 Delay time of brake operation depends on model type. "Brake operation delay time", Page 5-29
*2 Be sure to set the time from brake power ON to command input to be above 200ms.
*3 t0 represents the stop time of motor.
*4 Be sure to set brake power to OFF after the motor stops. Usually it is set to (t0+t1): about 1-2s.
During limit switch input, the "Electromagnetic brake timing (BRAKE)" output will be OFF.
t0
*1 *1
200ms to 1s
*2
> 200ms
*3
*4
t0+t1
t1
OFF
ON
ON
ON
ON
Brake release
OFF
OFF
OFF
Brake operation
Control circuit power for
servo amplifier
Main circuit power for
servo amplifier
Servo ON
Electromagnetic brake
power supply
Connection section of
electromagnetic brake power supply
Position command
Motor rotation speed
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