I've run into a similar problem, came here looking for answers. I'm converting a cheap xvico printer to a duet 3 board. (yes, the board costs more than the entire printer, but it'll work!)

I only have the X and Z steppers connected so far, and the X limit switch. It already wont home properly. I found the limit switch is bouncing erratically when the stepper turns on.

I thought I'd try twisting the stepper wires together, as suggested here, but I look at my printer and find it's using a 6 conductor cord to each stepper. 4 wires for the stepper and 2 more for the limit switch, bundled nicely in a black cord.

I'll replace these wires. A few alligator jumpers to the limit switch and it works properly now.

@bearer said in programming binary "Duet3_SDiap_MB6HC.bin" not found:

https://github.com/Duet3D/RepRapFirmware/releases/download/3.0/Duet3_SDiap_MB6HC.bin

I was trying to update from 3.01 to the latest 3.2-beta2, but it would result in errors, which I couldn't find any clear answers for. I still don't understand why this file was missing and needed, but this worked for me. I first uploaded this SDiap bin file, (which is for 3.0), then I updated to 3.1.1, then I was finally able to update to 3.2-beta2.