I have a lathe machine with a Fanuc Series io Mate -TD.
The problem is that when I command a M03 S500 at high speed gear, the machine gives a spindle speed of 350RPM. If I comand a M03 S500 at low speed gear the machine gives a spindle speed of 90RPM.
I was thinking that it is a PID parameter problem.
Can someone help me on how to set the PID in this fanuc controller?
Can it be another problem other than the PID?

Thank you for your help.

Martin

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