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  1. #1
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    Sep 2017
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    Chinese CNC Retrofit G540

    I got a Chinese CNC that I retrofitted with a G540. However, I cannot get the stepper motors to operate smoothly. I would appreciate any help offered. My guess is that it's a Mach3 software issue because I tried a 4th axis stepper motor from another machine and it does the exact same thing as these three stepper motors. Here's a link to a youtube video for it.

    https://youtu.be/rOzktfUynF8

    Thanks for the help.

  2. #2
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    Jan 2010
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    Re: Chinese CNC Retrofit G540

    The first thought that comes to mind is that a 24 volt power supply seems very small. What power supply did it come with originally?

  3. #3
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    Sep 2017
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    That’s the size of the original power supply. It’s jumpy with only moving one stepper motor at a time.

  4. #4
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    could this possibly be a reversed polarity issue on the stepper motors?

  5. #5
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    Jan 2007
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    385

    Re: Chinese CNC Retrofit G540

    Got a Multimeter? Measure the DC volts of the power supply when you try to move the stepper. it *might* give you a clue.

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