I am having a little hicup with setting the step motors, I fitted a UC400 and all seems to be working, I have always used it on mm's but since using pixelcnc I find it easier to design in inched, my brain does not understand what mm's looks like as it is wired in inches, so I altered the units in Mach3 to inches  when I was trying to get the step motors to travel the right distance,  I provisionally set the boxes on x and y to 320 200 200 I think I cant remember now. I used the auto tool ie asked x to travel 2" it travelled about 1/4" I then informed the programme of that when prompted, it then recommended a setting which i agreed to, tried it again and it was still not correct, tried to do this several times but it did not work, when I set everything back to metric and set the step motors to the original settings all was fine.
What am I missing?