The roller have moved the belt +/- 2mm outside.
But i do not agree with this change will make the axis move in an tangent distance, the axis will allways move on the metal tube, but with some little lateral force. When the stepper motor make an full rotation the distance will be exactly the same was on the original design. The only difference will be some lateral force made by the belt on the printed roller.
Reply To: CNC building report