MakerFr.com

hi guys i have a cnc with grbl 32bits card with a katsu spindle for two years now. the spindle is powered by the relay present on the board and I have never had any problems. now all of a sudden the spindle stops during work and then suddenly turns on again, perhaps only for a few seconds before turning off again. The spindle works regularly if connected directly to 220v. in your opinion what could be the problem?
Thank you.

I tried to connect the spindle directly to the cnc power supply and so I have no problems. at this point I deduce that the problem is in the output of the card. perhaps the relay. no one expresses himself?