10,160 steps per inch is only a starting point. Try measuring a straight 1" cut on both X and Y directions--Then tweak the steps per inch up or down to adjust and try again. When you can cut a 1" straight cut in both axes that IS 1" long, then try to cut a 1" SQUARE. If square ok, try the circle again.
Once the SPI is set properly, any circular error will either be backlash or Z deflection. Measure and eliminate/compensate backlash then try square/circle again. Now any error could be Z deflection.
CR. |