Hoping someone here can help me with an issue I'm having with my VMC 20.
I'm having some issues with the motor speed fluctuating at speeds above 6500 rpms, I know that the easy answer is the encoder is bad, however I've put 2 new encoders on the machine same issue. The machine has a glentek spindle drive in it that can be set to bypass the encoder and run off of basically a VFD. If I run in this mode the rpms do not fluctuate.
So I'm back to a problem with the encoder, but I've tried 2 already as mentioned, about the only thing left is the wiring harness. Has anyone out got some thoughts on this issue?