Yaskawa Sigma Mini - Manual (Page 42)

1.4Conducting a Test Run
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1.4.4 Supplementary Information on Test Run
In the following cases, always refer to the information described below before starting a test
run:
• When using a Servomotor with a brake
• When performing position control from the host controller
Using a Servomotor with Brake
A Servomotor with a brake is used for vertical axes or axes subject to external force. The
brake prevents the motor shaft from rotating if it is subjected to an external force or the
force of gravity acting on the load when the Servomotor power is OFF.
Servopack uses the brake interlock output (/BK) signal to control holding brake operation
for a Servomotor with brake.
• Vertical axis • Axis to which external force is applied
Servomotor
Holding brake
Prevents the
motor from
rotating due to
gravity
External force
Servomotor
Note To prevent faulty operation caused by gravity (or external force), first check that the Servomo-
tor and holding brake operate normally with the Servomotor disconnected from the machine.
If all operations are normal, connect the Servomotor to the machine and conduct a test run.
For wiring of a Servomotor with a brake, refer to 2.4.3 Holding Brake.
Performing Position Control from the Host Controller
If the position control of the host controller is incomplete, check Servomotor operation
and then conduct a test run according to the following table. Always disconnect the Ser-
vomotor from the machine before conducting the test run or the Servomotor may run out
of control.
Servopack
Host
controller
Speed
reference
Speed control
Test run for
Servomotor
without load
M
Position control
1