Need Help! Chinese CNC Retrofit G540


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Thread: Chinese CNC Retrofit G540

  1. #1
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    Default 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.



    Thanks for the help.

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    Default 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?



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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.



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



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    Default 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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