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General Mach Discussion / Re: Lathe Threading
« on: November 09, 2007, 08:42:14 PM »
Well, for starters, 1000rpm is very fast for threading for even a high end CNC lathe. My guess is that you have backlash enabled and the groove in the end is caused by the time it takes for the machine to reverse the X axis stepper until the mechanics can catch up and draw the tool away and out on the 45 degree taper as it's supposed to. Drop the rpm down to maybe 500 or less and possibly see what the backlash speed is set to. Exact stop should be fine for this.