Hey Guys,

I have a Type A Machines Series 1 3d printer. I've recently been having trouble with the extruder stepper motor twitching but not spinning. After testing everything I could think of (changing pot voltage on the stepper drivers, replacing stepper current drivers, etc. I think I've finally isolated the problem). After swapping my extruder stepper driver with the z axis stepper driver, the z axis still works, and the extruder still doesn't work. So my conclusion is that the problem has to do with the RUMBA board, specifically the bay where the stepper driver connects to the board.

Because there are 6 bays on the RUMBA controller, only 4 of which need to be used, is there a way in the MARLIN firmware to change the bay for the extruder stepper driver?

Here's the link to the exact firmware this printer uses:

[www.typeamachines.com]
(specifically: Series 1 (2014 with G2 [Needle-Based] Hot End) )

Here's a link to the RUMBA board:

[reprap.org]

I hope I've provided enough detail here.

Kind Regards,

Austin

You just need to find and change the pin assignments for E1 so that E1 = E0.