I'm building a DIY CNC router. I'm running at a low RPM and only planning on cutting soft materials (wood and under, maybe a PCB).
I'm currently having problems with magnetic interference. When starting the spindle, hard end stops would trigger, and sometimes my controller (arduino) would become unresponsive. For now I've turned off hard end stops, while building the rest of the machine. I'd like to re-enable hard end stops though.
I'm planning on moving my controller further away, and potentially placing it in a metal box. For the end stops however, I'm not sure how to solve it in an as DIY way as possible.
I've got a couple of questions:
- How can I measure interference, and below what levels should I stay?
- Will it help to simply wrap aluminum foil around my wires and hook that up to ground?
- Does it work to hook up shielding to DC ground/zero, or should I hook it up to my AC ground in front of the AC/DC converter?
- Where can I find a "beginners guide to magnetic interference"?