−
75
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The rotation is not smooth.
The motor rotates slowly even if the target speed is zero in the
speed control mode.
Category
Parameters
Adjustment
Wiring
Causes
The control mode selection is not
correct.
The gains are not appropriate.
Velocity and position commands
are not stable.
CN I/F signals are chattering.
① Servo-ON signal
②CW/CCW torque limit input
signal
③ Counter clear input signal
④ Speed zero clamp signal
⑤ Command pulse input inhibit
signal
Countermeasures
With the position control mode selected, if Pr02 is
set to other than 0, the motor will rotate slowly be-
cause Pr52 (velocity command offset) governs the
operation of the motor. Change the value of Pr02
to 0.
Increase the value of Pr11 (1st velocity loop gain).
Insert a torque filter (Pr14) and then further increase
the value of Pr11.
Check the behavior of the motor using the check pin
on the LED touch panel and the wave form
graphics function of PANATERM. Check the wiring
and its connections. Check the controller.
① Check the wiring and connections between CN I/
F pins 29 and 41 by monitoring the display of in-
put and output signals status. Modify the wiring
so that Servo-ON signals can be made active cor
rectly. Check the controller.
② Check the wiring and connections between CN I/
F pins 17 and 18, and 16 and 17 using a circuit
tester and/or oscilloscope. Modify the wiring so
that CW/CCW torque limit input can be made ac-
tive correctly. Check the controller.
③ Check the wiring and connections between CN I/
F pins 30 and 41 by monitoring the display of in-
put and output signals status. Modify the wiring
so that Position Error Counter input can be made
active correctly. Check the controller.
④ Check the wiring and connections between CN I/
F pins 26 and 41 by monitoring the display of
input and output signals status. Modify the wir-
ing so that Zero Speed Clamp input can be made
active correctly. Check the controller.
⑤ Check the wiring and connections between CN I/
F pins 33 and 41 by monitoring the display of
input and output signals status. Modify the wir-
ing so that Command Pulse Input Inhibit can be
made active correctly. Check the ontroller.
Important
information
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