Hi there, I’m trying to get a 36v4 Driver to work with the SOYO SY42STH38-1684A (NEMA17) and an Arduino Uno. I know there have been several forum posts about this very problem before, but I’ve read them carefully and haven’t found any clues about why this isn’t working. Sorry if I’m missing something obvious.
I don’t have an oscilloscope (yet, it’s on the way), but with a multimeter I was able to verify:
I get my input voltage across GND/VM, so I feel confident that the board is receiving power and that I haven’t supplied reverse voltage. I’ve tried 10-20v from my DC bench power supply.
I measure ~5v between GND/IOREF and between GND/SLEEP, so these appear to be connected correctly.
On the other hand, these measurements were not as expected. Should these concern me?
I can’t detect any voltage on the V5 (OUT) pin.
I can’t detect any connection between GND on the microcontroller side and GND on the power supply side. The voltages I reported above only work if I connect to the GND on the same side of the board.
I tried both examples in the HighPowerStepperDriver package. Neither of them is doing anything.
Any idea what I am doing wrong?