Stepper skipping/single phasing
So mid print the extrusion stepper stops extruding. If you tell it to extrude or retract it just flutters back and forth. kind of like its bouncing between two poles. I am not sure these motors have poles? But that is the idea.
First I removed the extruder stepper plug at the motor and plugged in a spare stepper. it dose the same thing with the spare so it's not the motor.
Next I unplugged the Z stepper and the extruder cable at the board. I plugged the extruder cable into the Z stepper driver then tell the Z to move. The stepper turns normally. This tells me the wiring and plugs going to the stepper are good.
Now I plug the Z cable into the extruder driver and tell the extruder to advance and the Z axies moves normally. I did this to see if the problem was in the extruder driver. Now I put everything back where it goes and the extruder still is not working correctly, skipping. What am I missing!!!!
Just noticed this message.
Warning: motor phase A may be disconnected reported by driver(s) 3
This is displayed at the bottom of the screen when I try to run the extruder motor.
engikeneer last edited by
@CarlBosson that sounds like crimp that is a bit loose or possibly a broken/breaking wire. Maybe double check the crimps in the connectors?
What board are you running?
Definitely sounds like a bad crimp or broken wire at the crimp. It may depend on position to show up. Best to re-terminate the crimps. I've seen it happen a few times on extruder motors that have removable plugs when the wires have been bent to the side.
The error message indicates phase A so that would be the first wires to check.
@engikeneer the board is the duet 3D wifi if that is what your asking. I agree with both of you. I did some more searching after I posted this. I am pretty sure its a bad connection or broken wire. I have ordered new plugs and will run new PTFE coated wire. i will update when done. should be back up mid next week. Thanks for all your help.
@engikeneer You were correct. I rewired the stepper and the problem is solved! Back to printing. Thank you for all your help.