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« on: October 03, 2011, 03:49:02 PM »
I have no other way to title this, but let me elaborate,
I use cambam to generate G code and run a program in Mach 3. My lead screw for the z axis is an m8 metric thread with a pitch of 1.25mm. my x and y axis are on a sprocket and chain system and can attain much higher speeds than the z axis. When cutting tonight and 1200mm / min, it seems that the z axis gets out of calibration / position or something as half way through the process, mach 3 shows 3mm above surface, but the spindle is virutally on the wood. ( at position zero) then later, it's even further down at -2 or -3 and mach 3 says the spindle should be at 3mm.
I am not sure but could it be when the spindle jumps over the triangular tabs which cambam makes, it is a little too fast for the metric lead screw to wind up and wind back down again?
It is really frustrating as you could imagine as I loose good wood in the process and waste.
any comments or assistance would be greatly appreciated,
Thanks
Thys
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