Geck 540 motor drivers??

[Jonathan]

I'm no electrickery expert but have experience of similiar things and it could be high EMF getting introduced on the drive power line and because your using linear psu's they protect them selfs from returning currant. The drives will try to pass any extra currant back but if can't go anywhere they will protect them self and fault. (Or blow up if too high)

At worst electromagnetic interference is only going to add well under a volt to improperly shielded cables. That's not enough to damage the drivers due to overvoltage, since the voltage they output is substantially greater. Also, the drivers are optically isolated, so no matter what you do to the motor side it's not going to harm the breakout board.

Having said that, it's a bit strange that a red fault light is showing. Assuming that's on one of the drivers it's most likely caused by a dodgy connection somewhere on the motor. That or it could be that the power supply you're using isn't regulating the output properly, since these drivers do apparently have protection against over and under-voltage. I tend to agree that if you want to start buying things, getting or making a better power supply would be your best bet. But check the wiring first as that's more likely...

[JAZZCNC]

Having said that, it's a bit strange that a red fault light is showing. Assuming that's on one of the drivers it's most likely caused by a dodgy connection somewhere on the motor.

Yep it's the Red fault light that makes me think it's power related more than signal error and that's why I said " this would be my first component change if I couldn't find any wiring faults."

I agree thou it's more likely to be a wiring issue.!!