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Not worth to repair since they are cheap imo, but dont buy a motor before you confirm its not something else. You have 3 components, motor, wire and stepper motor. Plug it in x driver and move your x. If the problem is still there its motor or cable. Then switch cables if they are detachable, or visually inspect cable/connector. So if you are looking for feplacement, just find a label on your motor and search that on internet. If you dont chose the same model you might need to change your stepps/mm in fw or adjust current (vref). Its most likely nema17 bipolar 1.8 deg, but you have to check length to be sure it fits where your extruder should be. Simmilar size = simmilar power, but you shoudl fine tune your vref anyway. Too much current = motor overheating or stepper motor overheating and it can also skip, too low current = motor skipping. If it died you might be running it too hot, but you would probably burn driver first.
First of all thank you for your answer.
I will try to test it with the x axis I don’t know that will work.
I try to put a led and it light up ok on both poles.
I did search using the number on the motor, but I wasn’t able to find the exact model.
So can I just buy a similar size and wires and fine tuning in the firmware if anything goes wrong ?
The bill of material just says 42HD1418-01,Two-phase,25mm.
So any nema with 25 mm and 4 wires will work ?
Sorry for the lots of questions, but I’m a little lost in this replacement.
Ye I couldn't find any datasheet of that one. Maybe e-mail them and ask?
Well, I'd say any Nema17 bipolar (4 wires) 25 mm in length (similar current) and probably 1.8°/step or 200 steps/revolution (like most of them) should work. If you get wrong resolution (steps/revolution) your extruder will move wrong distance (like double), but you can change that in FW. And you should fine tune Vref (small screw on your stepper driver or in FW) to find sweet spot between heating and torque
You can do some math to identify resolution. Check your FW, quick search got me:
I guess its 380 steps/mm, but I should go deeper in that and do some math (gear teeth numbers, grub screw diameter) to confirm what resolution is original. Shouldnt be hard if you get all information needed, but still easier to ask them what stepper is that. Since its kinda standard 200 steps/rev would be my bet