Timer too close with "gear" motor (v1.1 ERB)

[warpwookie]

Hello I'm not sure what to do but I'm getting a timer too close error and my printer stops. This is only when trying to activate the "Gear" motor. the selector motor works fine, and when I connect the "gear" stepper into the "selector" port it runs as well. even with no cable connected when I try to test the "gear" motor it stops my printer and give Timer too close with mcu "mmu". It seems to be the port, I'm not sure what to do, please help! I also cannot find a pinout diagram or any documentation on the V1.1 board, very upsetting because it is being sold on the market with no information, shame.

[slightlysketch]

I can help.
At work now.

Spent all night with this board and even got sensorless tool head sensor working with it.

Please post your klippy logs and your config files.

[slightlysketch]

also before I even check all that, what is your host for klipper? Are you using the cable they sent? It’s trash and don’t use it. Buy a quality cable as crap cable can cause that error.