I recently upgraded from a Creality 4.2.7 controller board to a BigTreeTech SKR E3 Turbo and touch screen. When power is applied, the extruder motor turns slightly, then freezes and has a low humming noise with the shaft locked up, the only way to stop it is to unplug it.
The hotend is a Micro Swiss direct drive set up in an Ender 3. So the motor has been used for about a year and worked fine. All of the other motors work fine, but the extruder motor is behaving like this, it hasn't worked at all in this current set up. I can't pinpoint if it's a firmware issue or if something is shorted on the mainboard.
I’ve tried all of the basics, flip-flopped all of the pins around/checked the wiring, all seems correct. I tried a different 42-40 motor and got the same result. All the other motors work fine so I think it might be firmware but I don’t really know. Any help is appreciated!
See this link for a video of the issue.