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General Mach Discussion / Calibrating each axis?

« on: May 06, 2008, 11:48:39 PM »

I have all three axis so that when you move 1 inch in Mach 3, a dial indicator shows 1 inch of travel within .0005". BUT what I don't understand is if I tell it to move .1" it ends up about .007" short of that .1" and then I tell in to move another .1" it picks up a little of that distance lost and is about .006" short of .2". I keep going by .1" increments and by the time it gets to 1" of travel I am back to dead on 1" of movement on the dial indicator. What do I need to do to make the movements under 1 inch correct also.