Calibration question

[Hugues]

*********sorry for formatting, can't create paragraphs anymore, not sure why*********Back on this issue.I checked all the belts and set screws, could not find anything loose really.So I printed a L shape part to check calibration in X and Y, it was about 4% longer in Y, so I changed the steps per mm in Y then printed again.Now the X and Y arm of the L shape are pretty much the same as you can see on first 2 pictures:101.40 mm in X 101.15 mm in Y.So i thought I'm good to go and printed a small disc for a client, the largest D should be 15mm.As you can see on next 2 pictures, I have more than 1mm difference between largest D and smallest D !How could this possibly be ? That small disc is visibly oval.Anything wrong with my gcode ? I pasted the top and bottom part in next reply;