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Author Topic: Stepper screaming  (Read 1667 times)

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Offline 2CVer

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Stepper screaming
« on: November 23, 2014, 05:06:09 PM »
I have a router that I'm trying to setup in Mach3. I have done the motor tuning and I can successfully jog all axes at 100%. I have a program the drills the holes in a vacuum bed that rapids from zero, profiles a hole, retracts to safe z, moves by G00 25mm in y and then profiles the next hole. The rapid from zero works file, the profiling of the hole and retract works fine, but the rapid in y only mooves a few mm and the stepper screams. This problem repeats for each hole. Jogging the machine at 100% in y after the problem has occurred also works fine. What parameter haven't I set correctly.

Offline Hood

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Re: Stepper screaming
« Reply #1 on: November 24, 2014, 04:44:09 PM »
Reduce your Velocity and acceleration in motor tuning, it sounds like you are just on the limit of the motors capabilities.
Hood

Offline 2CVer

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Re: Stepper screaming
« Reply #2 on: November 24, 2014, 04:46:42 PM »
Thanks Hood. I'll give that a go in the morning.

Offline Hood

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Re: Stepper screaming
« Reply #3 on: November 24, 2014, 04:51:16 PM »
If that doesnt help then the other thing to try is increase the pulse width a bit.
Hood

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Re: Stepper screaming
« Reply #4 on: December 07, 2014, 05:52:38 PM »
I've spent today playing with my router and discovered that the problem is due to my Backlash configuration. When I turn Backlash compensation OFF everything moves sweetly.

What I did to fix the problem was to increase the value for Shuttle Accel. (in General Config...) from 0.01 to 0.05. Now I have Backlash compensation working and high rapid speeds. :) :)

Offline Hood

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Re: Stepper screaming
« Reply #5 on: December 08, 2014, 05:11:00 PM »
Ah, yes Backlash can be problematic if not set correctly, good you found it :)
Hood