So I just finished building my MPCNC yay!!
But when testing I found a problem doh!!
I printed the pieces out myself but the hardware/electronics/extruder were all purchased from vicious1.
Without any filament in the extruder it seems to only move a single step and then back again when attempting to extrude/retract. It won’t go continuously in either direction. I get the same result with the hotend cold or hot, I tested both wondering if it was Marlin’s underheat protection but that doesn’t seem to be the case. I used a multimeter on the extruder motor wires to make sure the motor coils were wired in pairs correctly and that does seem to be the case.
All the other axis/motors move normally. This is the second ramps based printer I have built so I’m not unfamiliar with the basic setup but I haven’t seen this problem before.
I’m not sure what else to check.