Hi fellas,
I have a cnc 3020 and I ordered a 400w spindle as a upgrade. This is what I bought... (CNC 400W Spindle Motor ER11 Mach3 PWM Speed Controller Mount Engraving Set | eBay) Now my question... I installed the board into my controller box and when i powered up the spindle the spindle spun for a second(even though the spindle control knob was turned all the way down and it shouldnt have moved) and then blew the breaker. Any idea on what happened here? When I contacted the seller he said my "i guess the working voltage is more then 60v"..... how do I tell how much working voltage I have? Any help on this would be GREATLY appreciated! Thanks in advance!