It is a sad day. My extruder stepper no longer moves.
I guess over the past couple of weeks the nut holding the hobbed bolt in worked loose and it began to grind notches into the filament and quit printing. I didn’t realize this and was thinking it was the PLA or humidity.
After the latest failure the stepper no longer responds so out comes the multi-meter and my dearstalker!
- I verified the wires all the way from the controller board connector to the stepper connector by testing the resistance, passed
- I verified that the two winding’s generate voltage when you twist the stepper back and forth, passed
- I verified that the fans and nozzle heater all work by turning them on and observing them, passed
- I could NOT verify the stepper by commanding it to move from the menu, failed
Is it the controller? Is it the stepper?
I did notice I had this little gooey heat sink that had melted and fallen off the Z access chip on the board. I looked it up and apparently there was a directive to take it off because it over heated and caused failure of the board. It was the Z axis which appears to work correctly so maybe that was just a stroke of luck.
Any ideas about my poor Extruder?