Geeetech

I recently installed the 3D touch sensor on my A20M. When I go to level the bed, the print head rams into the print bed and it makes a shuddering sound. Any ideas on how to fix this?

Once I unplugged the 3D touch sensor it all worked. Not sure why having it plugged in caused that problem to occur

Nevermind, I found the firmware and tried inverting it. This worked to bring it back down, but it still will not go back up. Is there another setting to change?

Thanks, where I can I download the Marlin firmware, is there one that already has the A20M set up in it?

I recently bought the A20M. From The LCD screen I tested the axes. However, the Z axis will go up but not back down. Even homing it does not bring the z axis back down. Any ideas as to why the Z axis will not go back down?

What would that process look like?

Does anyone know if it is possible to put a dual extruder such as the MK8 on the A20 printer?