“Can somebody describe how does a star-like topology look in my case? I've also read, I should ground the motor drivers, but I can't seem to find anything on the internet regarding this”.
Get a good size (CSA) piece of connecting wire from mains earth (or ground) to each PSU (the same size as the mains power feeding the PSU’s) connect one end of the screen cable to the steppers at the control card end to a common point - (i.e. psu case ground) leave the stepper motor end unconnected to the screen. Do the same to the spindle motor. That ‘should’ help! Hope that makes sense!
John
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