YASKAWA Sigma II Series User Manual

8 Operation
8.3.4 Setting for Holding Brakes
8-22
8.3.4 Setting for Holding Brakes
The holding brake is used when a SERVOPACK controls a vertical axis. In other words, a servomotor with
brake prevents the movable part from shifting due to gravity when the SERVOPACK power goes OFF. (Refer to
8.1.4 Servomotor with Brakes
.)
There is a delay in the braking operation. Set the following ON/OFF timing. The timing can be easily set using
the brake interlock output signal.
* 1. The servo ON signal and holding brake power supply may be turned ON simultaneously.
* 2. The operation delay time of the brake depends on the model. For details, refer to Table 8.1 Brake
Operation Delay Time.
* 3. Allow a period of 200 ms before the speed reference is input after the brake power supply is turned
ON.
* 4. The servomotor stop time is shown by t
0
. Refer to Table 8.2 Calculation Method for Servomotor Stop
Time for the calculation of t
0
.
* 5. Always turn OFF the brake power supply after the servomotor comes to a stop. Usually, set t
0
+t
1
to 1
or 2 seconds.
* 6. Turn OFF the servo ON signal 0.2 to 1.0 second after the brake power supply is turned OFF.
Servomotor

Vertical Shaft
Holding brake
Prevents the servomotor
from shifting when
the power is OFF.

Shaft with External Force Applied
Servomotor
External
force
Prevents the servomotor from
shifting due to external force.
OFF
OFF
OFF
OFF
Brake release
ON
ON
ON
ON
*1
*2
*4
*5
*6
*3
200 ms or more
200 ms to 1.0 second
0V
*2
SERVOPACK main
power
SERVOPACK control
power
Servo ON
Holding brake power
Brake contact part
(lining)
Speed reference
Motor speed
t
0
t
0
+t
1
t
1

YASKAWA Sigma II Series Specifications

General

Brand	YASKAWA
Model	Sigma II Series
Category	Controller
Language	English