I'm in the configuration stages of a Folgertech Kossel 2020 using a RAMPS board (1.3 or 1.4, I'm not sure). I've got the X, Y, and Z extruders working fine, and I can load a gcode file and the extruder seems to make all of the right movements
except the extruder doesn't advance the filament. Whether I try a normal print job, or manually send a "G1 E15", or use Printrun/Pronterface' "Extrude" button, the serrated extruder wheel just kinda "rocks" back and forth ever so slightly. I can manually push the filament through, so I know that the extruder is hot enough.
The extruder stepper is plugged into the RAMPS board correctly (and oriented the same way as the X, Y, and Z connectors). I've got the driver board pot set to about 0.55V.
Anybody know where I should be looking to find the problem? Is this likely a driver pot setting? Is the driver board probably bad? Something else?