Need some ideas, I converted a G0602 to cnc and I can't get the thing to cut accurately in the X. I have tuned the motor steps with a indicator and get consistent movements both in + and -. When I go to do a step cut test (piece with 2 different diameters) I get inconsistent sizes in the dimension,. ie. a programed diameter is off .018 on the larger side of the cut and .0115 on the smaller side of the cut. In my thinking these differences should be consistent. This makes it very hard to fine tune the steps. I have made adjustments to the gibs, checked for slippage on the pulley gears and the bearings are not too tight. I do not believe there is any slippage in the ball nut mount on the X slide either. Any other ideas of things to check?
Thanks in advance
Ed