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General Mach Discussion / Mach3 won't keep zero!

« on: August 10, 2009, 01:26:08 AM »

So I notice that my machine won't keep its zero, so I write a program to confirm this. I leave it to g0 x0 y0 z0, g0 x1 y1 z1, and I let it run for an hour and it's still dead on from what I can see. The monitor had gone into power saving so I wiggle the mouse. The machine is still running, and it IMMEDIATELY loses it's zero and smashes the bit I have in the collet. It obviously lost a TON of steps on the up swing, meaning the zero point was now below the bed. What can I do to prevent this? Please please tell me there's a better solution than preventing the monitor from going into power saving.