I am doing a mach3 retrofit on a ycm40 .
I bought the viper 200 drives in Dec. 2016
But just got to the point of installing the electronics
A few weeks ago. It has SEM servos with
US digital encoders. I have had all three axis
Working. I have been working on the spindle
For a few days and when I went to move the Y
Axis tonight it will only move and hold in one direction.
Any ideas on what could cause this?
It's been working fine could I have damaged
The drive somehow?
Thanks Jim