SKR-2 VS BIGTREETECH-TMC2209-V1.2

The jumpers are described very well in the manual. https://github.com/bigtreetech/SKR-2/tree/master/Hardware

If you look at the pin diagram on BigtreeTech's github pages, it will tell you what and where all the pin names and numbers are.

Check this out https://github.com/bigtreetech/SKR-2/issues/102

Get a board with more stepper drivers like the SKR 3 or an Octopus or something.

I connected just the power supply and not turning on anyway. I find this https://github.com/bigtreetech/SKR-2/issues/144 It seems like it's a known issue lol. I'm turning this crap back to them. I have really bad luck for electronics 🤣

Yes. It replaces the z endstop on the 5+. There is a section on how it should be connected in the user manual. https://github.com/bigtreetech/SKR-2/tree/master/Hardware

Have a look at the github for the SKR 2 here. In the hardware folder, they've included pinouts and schematics.

I had my electronics project prototyped on a breadboard with everything working initially and then I decided to start wiring things up in my electronics box and now I can't for the life of me get the stepper working how I had before. I can still get a little bit of movement out of it after changing the pin configurations for the MS (microstepping) pins. If I change the RPM in software, the existing low-speed movement I can get out of it will become louder, stop or slow the motor completely. I believe that there is a phase issue on the physical wiring of the stepper, otherwise cycling through every microstepping pin configuration should eventually have aligned with what was specified in software and got it rotating as per normal. I am using a BigTreeTech v1.2 TMC2209 stepper driver whos datasheet can be found here. I considered I might have blew one of the FETS on the stepper driver when trying to diagnose the problem and different phase combinations, so I pulled a spare driver off my 3D printer and wired that up and can confirm it is acting the same way; which rules out a bad IC.

The documentation, including the schematics, for the two versions are at https://github.com/bigtreetech/BIGTREETECH-EZ-Driver/tree/main/BIGTREETECH%20EZZ2209%20V1.0 and https://github.com/bigtreetech/BIGTREETECH-TMC2209-V1.2

Stepper motor drivers in modules follows the standard created by Pololu some years ago, and are widely used on DIY 3d printers. Couldn't find much info about the TwoTrees module, but the BTT one have good documentation on the company's Github: https://github.com/bigtreetech/BIGTREETECH-TMC2209-V1.2/blob/master/manual/TMC2209-V1.2-manual.pdf, so you can use it to connect the TwoTrees module.