Sigma II User’s Manual
Chapter 4: Trial Operation
4-10
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.
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.
Holding brake
Prevents the
servomotor from
rotating due to gravity.
External
force
Servomotor
Servomotor
•
Vertical shaft
•
Shaft with external force applied
Power supply
Three-phase 200V
L1,L2,L3
Servomotor with brakes
U,V,W
M
PG
Encoder
C N 2
Magnetic contactor
Single-phase
200V
Brake control relay
Brake power supply
SGDH
Servo
amplifier
90V
DC