08-13-2009, 10:04 PM
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| | | Join Date: Nov 2005 Location: USA
Posts: 124
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Help Minimizing Chance of Lost Steps | |
Hi,
Given a stepper motor controlled lathe, G201's and Mach3, which of the following is best practice for writing g-code in order to minimize the probability of lost steps and degradation in accuracy: 1) accelerating the cutter (z or x axis) into the workpiece from a resting point very close to the workpiece so that the steady state ipm is reached while cutting, or 2) accelerating the cutter into the workpiece from a resting point which is far enough from the workpiece to allow the cutter ample time to reach its steady state ipm value outside the workpiece. My intuition says number 2, but stepper motor torque vs rpm curves seems to say number 1. Some experimental data I took seems to say it probably doesn't matter - or else I have more than one issue. I own a lathe that needs to be babied to maintain even a few thousandths accuracy and I'd like to do anything I have some control over to improve it. I'm afraid the motors just aren't up to the job. - Terry |
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