SP300V Contour Cutting Issue

A friend of mine owns an old SP300V with a strange problem:

Cutting contour is way off (more than 1cm) on the right side of the print, but will be a millimeter only at the left side of the print. I have varried out ENV MATCH, have checked the adjustment values, have done a LIMIT INITIALIZE, nothing helps.

Before replacing the motors and encoders, does everyone an idea why the cut contour have such an uneven deviation?

 

Thank you for your answers.

I haven't tried to do auto adjustment, I have tried to adjust manually in the service menu. But the deviation is more than the adjustable range. And the deviation is uneven, very different between left and right.

I agree that it could be something with the encoder. Difficult to find a way to repair that machine cost effective ... it is nearly 15 years old.

 

The linear encoder have nothing to do with cutting, problems with the linear encoder will show up in printing. For cutting, the Encoder on top of the scan motor is responsible. ENV. MATCH calibrates both encoders together, but won't help in my case.

Think of suggesting this friend to cancel with that printer ;-) .