I had recently bought used CNC Lathe with Fanuc Korea OT control.
It comes with faulty spindle encoder, we had changed with new one (1024 ppr) as specified in the manual.
Belt, Pulley, Key every thing is okay, Actual RPM displayed on the screen is 3% lower than programmed RPM.
If programmed rpm is 1000, Screen is showing 970 rpm.
Verified with Tachometer which confirms spindle rpm is as programmed.
I ignored this , not a big problem.

Recently I tried 3/4 bsp (pitch 1.814mm) OD thread, But result was Double start thread with pitch of 0.9mm (checked with template).

Any parameter to be set as new encoder was used.


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