YASKAWA SGDM 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
.)
1. The brake built into the servomotor with brakes is a deenergization brake, which is used only to hold and
cannot be used for braking. Use the holding brake only to hold a stopped motor. Brake torque is at least
120% of the rated motor torque.
2. When operating using only a speed loop, turn OFF the servo and set the input reference to 0 V when the
brake is applied.
3. When forming a position loop, do not use a mechanical brake while the servomotor is stopped because
the servomotor enters servolock status.
(1) Wiring Example
Use the SERVOPACK contact output signal /BK and the brake power supply to form a brake ON/OFF circuit.
The following diagram shows a standard wiring example.
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.
IMPORTANT
Servomotor
with brake
SERVOPACK
Power supply
Red
Black
Blue or
yellow
White
BK-R Y
: Brake control relay
∗
1 and
∗
2 are the output terminals allocated with Pn50F.2.
M
BK
PG
U
V
W
CN2
AC DC
BK-RY
BK-RY
+24V
L1
L2
L3
L1C
L2C
(/BK+)
(/BK-)
CN1
∗1
∗2
Brake power supply
Brake power supply Input voltage 200-V models: LPSE-2H01
Input voltage 100-V models: LPDE-1H01
R
S
T
Surge suppressor
CR50500BL
(manufactured by
Okaya Electric
Industries Co., Ltd.)
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YASKAWA SGDM Series Specifications

General

Brand	YASKAWA
Model	SGDM Series
Category	Servo Drives
Language	English