I used the software to figure this one out.I do have a problem with Mach3 I believe. When jogging it will move .500 and it looks like the motor jumps . It dose not move as smoothly as I would like . Motors make no noise. Now in Mach 3 when I do the driver test it is all over the map Too fast too slow excellent too slow.Never stays steady for more than a second or two. I have tried low gain medium gain high gain factory gain .And tuned the motor to be quite on all settings and no help I also tried encoder settings from 500 to 2000 and no help ,anyone have any suggestions how to make it run better?Or should I bite the bullet and buy a smooth stepper motion controller. My current set up is a c-10 BOB 4 Gecko 320x set at 500 encoder line count low gain 256 following error. 1x step. Laptop running windows xp . Any help is much appreciated thanks guys.