my question is ,why the axis pins numbers change , example , if i put in x axis : step pin 2 ,dir pin 3 , and start milling, the machine goes ok ,but after some time pass , the axis stop moving but the dispay show movement, when i chek the ports and pins box, it has change to step pin 4, dir pin 2 ,so the step pin ,always increase in 1 unit? no mather if i put other pin numbers