RRC[

Rat Rig Community [Unofficial]•3y ago•

40 replies

MARC

"Unable to read Tmc uart" stepper_z1"

Hi everyone. I have just finished building my vcore 3.1. I have changed my build slightly and purchased a manta m8p since my raspberry pi is tied up to a work project. I knew from searching around, there wasn't much trouble shooting or help using this board with ratos. I've got 3 printers running klipper already, all using skr mini boards. I thought id risk it, hoping everything would be good if I followed instructions to the letter. I guess not.

First, I mounted everything and made up my power leads. My first test, try the heaters, all good. Second test, wire in probe, fans and Endstop. All good apart from the part cooling fan (I'll make a separate post for this).

Lastly, I went for my motors.

I plugged in the jumpers to select the power from the motor_power input, second I put the jumpers on the uart select pins, placed the drivers inside the slots and then plugged in my motors. Everything booted fine. No errors. I held my finger over the off switch and pressed "home x". And I get the unable to read tmc error. I went around all the jumpers and drivers, all have solid connections. I checked my motor_power input voltage and it was reading 24v. I went back and forth trying different drivers on different slots. I tried powering the drivers via the mcu by changing the jumpers. Same error. I have tried re flashing the mcu, same error. I'm lost, I don't know where to look. As I've said, a I've used in the past is skr minis. Drivers, pin jumping... I'm almost certain I've missed something out.

Just to add to this, my extruder motor works fine. Just when I try to home x, y or z, I get this error.

Any help would be appreciated!

Thanks