Fitted another manufactures control board. You can brobley guess what, exactly the same.
So lets define the problem when engraving from A TO B goes off at angle also the Z alters in height. This is quite repeatable. So now we have tried 3 computers ,2 control boards all give similar results. The steppers even on the XYZ buttons seem a little rough. I am not a computer expert but know a man who is so lets call him the Wizard who brought along a labtop PC with a USB output and control board. SURPRIZE, SURPRIZE on connecting up the steppers sang like a bird cycling through the programme and completely overcame my problems. One instantly new they were working correctly, so not to jump to conclusions YET. We need to reconnect my drives and eventally configure USB on the main computer. Please be patient the final solution is near.