Dear Sir
In the subject Machine we find dimensional
Variation in job along X Axis
In servo lock conditions, we are able to
Rotate x Axis ballscrew by upto 200 microns
But position display does not change at all
If we move Axis in handle etc position display changes properly
Another observation is that if say we
Move x in increment, axis moves but if
We stop moving, Axis rotates back a little
We don't know y it rotates back a little Kindly advice about reverse rotation of Axis on its own after we stop moving in handle mode. We tried to increase velocity gain from 100 to 120 no effect then changed
Proportional gain from-1400 to -1200.
Motor decoupled and ensured coupling is intact. Motor is directly coupled


X Axis motor meggering and winding resistance ok
Kindly advice