Holding Brakes - YASKAWA SGDV series User Manual

4 Operation

4.2.7 Holding Brakes

4.2.7

Holding Brakes

A holding brake is a brake that is used to hold the position of the movable part of the machine when the SER-
VOPACK and converter are turned OFF so that movable part does not move due to gravity or external forces.
Holding brakes are built into servomotors with brakes.
The holding brake is used in the following cases.
Rotation
There is a delay in the braking operation. Set the following ON/OFF timing.
Servo ON command
Servomotor power
Brake signal (/BK)
Brake contact part
(lining)
Position reference/
Speed reference
∗1. For details, refer to the manual of the connected command option module.
∗2. Use Pn506, Pn507, and Pn508 to set the timing of when the brake will be activated and when the servomotor power
will be turned OFF.
∗3. After the Servo ON command has been turned ON and 50 ms has passed since the brake was released, output the ref-
erence from the host controller to the SERVOPACK.
4-14
Vertical Shaft
Servomotor
Holding brake
• The brake built into the servomotor with brakes is a de-energization brake, which is
used only to hold and cannot be used for braking. Use the holding brake only to hold
a stopped servomotor.
*1
OFF
OFF
OFF
Brake applied
*4
0
Motor speed
*3
Shaft with External Force Applied
Prevents the
External
movable part from
force
moving due to its
own weight when the
power is OFF.
Movable part of
Prevents the movable part (table)
machine
from moving due to external force.
ON
ON
ON
Brake release
*4
Movable part of machine
Servomotor
Holding brake
OFF
OFF
MECHA
*2
OFF
Brake applied