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Sigma II User's Manual
4.2 Supplementary Information on Trial Operation
Always refer to this information before starting trial operation in the following instances:
4.2.1 Servomotor with Brakes
4.2.2 Position Control by Host Controller
4.2.1
Servomotors with Brakes
Use servomotors with brakes for vertical shaft applications or when external force
must be applied to the shaft to prevent rotation due to gravity or external force dur-
ing a power loss.
The servo amplifier uses the brake interlock output (/BK) signal to control the hold-
ing brake operation when using servomotors with brakes.
•Vertical shaft
Note: To prevent faulty operation due to gravity or external force, first make sure that both the servomotor
and holding brake work properly when . When assured that each operates properly, connect the ser-
vomotor to the rest of the equipment to start the trial operation.
The following figure shows wiring for a servomotor with brakes. See 5.4.4 Using
the Holding Brake for details on wiring.
Power supply
Three-phase 200V
Single-phase
200V
Servomotor
Holding brake
Prevents the
servomotor from
rotating due to gravity.
SGDH
Servo
L1,L2,L3
amplifier
Magnetic contactor
Brake control relay
•Shaft with external force applied
External
force
Servomotor with brakes
U,V,W
C N 2
90V
DC
Brake power supply
4-10
Chapter 4: Trial Operation
Servomotor
Encoder
M
PG
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