Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

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16. INDEXER POSITIONING OPERATION
Description Check method Possible cause Action
The position
deviates during
operation after
the home
position return. 1. If the servo motor can be driven
safely, repeat acceleration and
deceleration three or four times
to complete auto tuning.
2. Increase the auto tuning
response (parameter
No.PA09). (Except for manual
mode)
The auto tuning response is low. Increase the auto tuning response, and
readjust the gain. (Refer to chapter 9.)
For geared servo motor, check
the setting of the electronic gear
(parameter No.PA06 and PA07). The reduction ratio is not calculated
correctly. Review the setting of the reduction
ratio.
Check the point table setting,
selection, start timing, etc. The setting of point tables and start
timing is incorrect.
1. Review the point table setting.
2. Review the controller programs.
The input value from the manual
pulse generator MR-HDP01 and
the command position (mm) do
not match. Wiring or multiplication setting
(parameter No.PA05, manual pulse
generator multiplication 1 (TP1) and
manual pulse generator multiplication 2
(TP2)) of the manual pulse generator is
incorrect. 1. Check the wiring.
2. Check if the multiplication is set
correctly.
1. Command input pulses are
miscounted by noises.
2. Shielding the command cable is
faulty.
3. The command cable has a contact
failure or disconnected.
Check the shield procedure of the
command cable.
The command from the controller
and the command position of the
servo amplifier do not match. Communication command error
(An unintended command is inputted.) Review the controller programs and
protocol.
(Refer to chapter 3.)
Check the in-position range
(parameter No.PA10). The in-position range is too large. Set a narrower in-position range.