The Position Deviates During Operation After The Homing - Mitsubishi Electric MR-J5-G Series User Manual

The position deviates during operation after the homing

Possible cause
1.
The electronic gear or the feed length
multiplication is incorrect.
2.
The servo gain is too low or the response of
the auto tuning is too low.
3.
The proportional control (PID control) is
enabled.
4.
The in-position range is too large.
5.
Mechanical slippage occurred or the backlash
of the mechanical part is too large.
6.
The command pulses were miscounted due to
noise.
7.
The command cable is loosely connected or
disconnected.
8.
The pulse train command frequency exceeded
the specification range.
9.
The command cable is too long.
10.
SON (Servo-on) turned off during operation.
11.
LSP (Forward rotation stroke end) or LSN
(Reverse rotation stroke end) turned off.
12.
CR (Clear) or RES (Reset) turned on during
operation.
Check/action method
Review the setting of the electronic gear or the feed length multiplication.
Refer to "Command unit select function" and "Electronic gear function" in the
following manual.
MR-J5 User's Manual (Function)
Check if the trouble is solved by increasing the auto tuning response ([Pr.
PA09]).
Adjust the servo gain.
Disable the proportional control (PID control).
Review the setting of [Pr. PA10 In-position range].
Check for a slip or backlash in the mechanical part.
If the command value of the controller does not match the number of
cumulative command pulses, perform the noise reduction techniques on the
command cables, or review the shield procedure of the command cable.
If the command value of the controller does not match the number of
cumulative command pulses, repair the command cable.
Use the pulse train command frequency within the range of specifications.
Open-collector type: 500 kpulses/s or less.
Differential line driver type: 4 Mpulses/s or less.
Set [Pr. PA13.2 Command input pulse train filter selection] according to the
pulse train command frequency.
Shorten the wiring length.
Differential line driver type: 10 m or less.
Open-collector type: 2 m or less.
Review the wiring or sequence program so that SON does not turn off during
operation.
Review the operation range or the position of the stroke end.
Review the wiring or sequence so that CR or RES does not turn on during
operation.
1 SERVO AMPLIFIER TROUBLESHOOTING
1.4 Trouble which does not trigger an alarm/warning
1
Model
[A]
[G]
[WG]
[A]
207