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@swanepoeljan are you kidding me!? This idea was not older than 24h and there was no weekend in between! I was not even able to comment fast enough that I...

hrhr, that is the right attitude! I am really not a programming guy but this PID autotuning is something for the Christmas time to get a bit more skilled, I...

Did you calibrate without load (belt detached)? That would be my first shot as imprecise calibration kills the PID loop quite easy. If the calibration is fine without load I...

for the flashing of the FW you will need an stlink dongle (clone). More details are here: https://github.com/bigtreetech/BIGTREETECH-S42B-V1.0/issues/3#issuecomment-691197566

@Sekai1942 I never used the serial interface and always flashed my changes directly. So, I can not help much on this one but there are other issues discussing on this...

is the s42b stepper driver timing already set to slow?

for certain motors I did not get any movement. They were freewheeling till some magic lock-position and step commands showed angle deviation running up but no movment. Other motors showed...

not suprising but it looks like the spacer needs to be **non-magnetic**, e.g. 3D printed, and the magnet should extend at least 50% outside of the motor housing. With this...

C4047 and similar are nema17 codings for common motors (https://reprap.org/wiki/NEMA_17_Stepper_motor) For me this translates to 40 mm motor length.

I tested now a few more nema17 and found a totally incompatible one even with the magnet completely outside the shaft cavity. It does not move at all in close...