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Home > Spindles, VFD's, and our Spindle Kit > Troubleshooting Shapeoko PWM Connection
Troubleshooting Shapeoko PWM Connection
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Are you having issues with your spindle dropping RPM's and/or not fully stopping when told to go 0 rpms?  Then you likely have a loose PWM cable thanks to the Molex internal design.


The problem is these two pins are backing off resulting in poor contact between the PWM wires and the internal controller.





A simple solution here is to pull the wire out, press in these pins to fully seat them, then add some hot-glue behind the pins like this:  


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