21 replies

Help - Stepper Issues

Finally got around to building my V-Core 3 with Oldham Z system from BRS.
Crazy long build but I believe all square and I think I did IMO, a very good job on wiring.

Setup is BTT Octopus 1.1 407 version with 2209 steppers.
U2C Can board with EBB42 - this took time but all working great now.

Fans, heaters, extruder all great and checked. Physical X and Y end stops checked and working.

My XY steppers act like when I try to move X or Y - one of the motors is locked. It will only move a tiny amount.
If I try to home I get Klipper shutdown and error 2.
If I try to move Z - only the front left motor moves.
I can't do a full home because XY causes a shutdown.

I checked all the PIN settings, aliases, went to the most Basic stepper setup. I have tried the wires both ways (other thread.)
I checked my jumpers. I check the belts. Motors run free and everything is smooth when it's shut off. Checked all the connections, continuity... can't find anything mechanically or electrically wrong.

I am at a loss. It seems to me like the printer doesn't know it's a CoreXY (even double checked this in the RatOS config file, and put it in printer.cfg for good measure.) The one Z motor that moves seems to move properly.

Attached pics, video of the weird stepper motion (like it moves and then jams) and printer.cfg.