Extruder motor vibrates but does not move

General Discussion
1

Hi, i’m using Klipper on SW_X1 with the original Motherboard and a raspbbery pi 3b+. I change the original extruder for a biqu_h2 (i also experiment some issue withe the original extruder).

When i try to load, unload or print a file my Extruder stepper vibrates but does not move.

What i have tried :

  • change the wiring setup → fail
  • put a brand new nema17 stepper → Extruder motor vibrates but does not move
  • Plug the extruder stepper on the X-axis → work well
  • i also try different wiring setup and 3 different cable without any result

so the problem should comme from the firmware but i cant figure it out.
i check the other Printer.cfg from Github for the same configuration without any result.

do i need to change the motherboard or it can be fix in klipper parameter

Thanks for your help
klippy.log (57.5 KB)

2 
rotation_distance = 3.4334
gear_ratio = 7:1

I cannot belive this to be correct. Would give you an effective rotation_distance of 0.49. I do not know this extruder but it most likely should look like:

rotation_distance = 24.034
gear_ratio = 7:1

or

rotation_distance = 3.4334
#gear_ratio = 7:1

Note: The gear ratio should be pretty accurate. Best thing is to measure the outer diameter of the gears or count their teeth. Such clean numbers usually are more marketing than technical.

3

i have tried that but it does not change. The stepper does not torque.

4

Basically you have three options, in my opinion:

  • Wrong wiring of the stepper motor, i.e. the phases are not connected A,B | A,B
  • Wrong current setting on the driver (too low)
  • Dead driver / dead stepper
5

I tried différent wiring situation, i dont think that come from the wiring.
I plug the stepper on the x-axis wiring and it torque without any noise.
we get a lot of power failure in my village so it could be a dead driver.

I order a SKR 1.4 Turbo but i wont be able to replace it before midle of june.
i’ll put a comment if it work.

Thanks