Originally Posted by
justicedavid65
@fretman - This is a design that is being used by several others and no issues with the gantry, so I don't think it's mechanical
@ger21 - Today I connected both Y motors directly to the steppers, no splice at all between motor and stepper. I ran some code and the right motor fell out of sync. Then I switch drivers and the same motor fell out of sync. I don't see how it can be anything except the motor? No wiring issues and the same motor lost steps on different drivers.