I keep thinking I’m missing something obvious. I hooked up the electronics today. I used a repaired Mega, a repaired RAMPS and two new DRV8825s with a 6A 12V supply. I set the drivers to 0.70V with no motors then powered it down and connected the two steppers, the limit switches and the USB. Fired up Repetier-Host and connected to the boards. Everything looked good to go, but when I tried moving nothing happened. OK, I swapped out the Mega2560 for a new one, just in case I’d screwed up the repair. Same thing. So I swapped out the RAMPS for a new one. Same as last time, no movement. OK, maybe it needs the display connected. Nope, display looks good, right version of Marlin for the ZenXY. No movement either with the display or from the PC. Rechecked the driver voltage, it’s still good. Finally grabbed a new stepper from a different vendor and no joy with it either. I am either missing something obvious or maybe I’m just going crazy.
Stepper and limit connections [attachment file=43081]RAMPS and Arduino [attachment file=43082]
Display shows normal [attachment file=43083]
Repetier-Host looks good [attachment file=43084]