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General Mach Discussion / Re: Spindle problem... slowly decreases RPM until stop.
« on: March 01, 2015, 05:39:06 PM »
Also, can someone explain the spindle motor tuning settings, as they pertain to PWM spindles, better? The Mach3 manual does not provide very thorough explanations, and I'm pretty lost.
1. Steps Per: What does this do? (I know what it does for a stepper, but how about here?) I've tried settings from 100 to 20,000, and all it seems to do is change how fast the spindle speeds up. Smaller settings result in smaller speedup, so 200 takes like 2 minutes, and 10000 takes like 10 sec. Does this have an effect on the problem posted above, where RPM never reaches the speed I set, or the voltage being less than max at full speed for the pulley?
2. Velocity: What does this mean for a spindle? Does it affect maximum speed? Nothing I change in here seems to affect anything obvious. Also, sometimes Mach3 forcibly sets it to something I can't change, I'm guessing based on my Steps Per and Acceleration values.
3. Acceleration: What do I want to put here? Obviously bigger numbers seem to result in faster acceleration, but how do I computer/know what it should be? Is it related to Steps Per and/or Velocity?
4. Step Pulse / Dir Pulse: Do settings here have any effect on PWM spindles? Changing them doesn't seem to have any effect.
1. Steps Per: What does this do? (I know what it does for a stepper, but how about here?) I've tried settings from 100 to 20,000, and all it seems to do is change how fast the spindle speeds up. Smaller settings result in smaller speedup, so 200 takes like 2 minutes, and 10000 takes like 10 sec. Does this have an effect on the problem posted above, where RPM never reaches the speed I set, or the voltage being less than max at full speed for the pulley?
2. Velocity: What does this mean for a spindle? Does it affect maximum speed? Nothing I change in here seems to affect anything obvious. Also, sometimes Mach3 forcibly sets it to something I can't change, I'm guessing based on my Steps Per and Acceleration values.
3. Acceleration: What do I want to put here? Obviously bigger numbers seem to result in faster acceleration, but how do I computer/know what it should be? Is it related to Steps Per and/or Velocity?
4. Step Pulse / Dir Pulse: Do settings here have any effect on PWM spindles? Changing them doesn't seem to have any effect.