Are you using Pronterface for your user interface? B/c I'm having some really weird issues there.In order to just get some extrusion onto the bed, by way of testing, I tried just entering the motion/extrusion commands into the manual entry window. And I'm getting some deucedly odd extruder behavior.
Now, when I hit the manual "extrude" button, the extruder performs perfectly. No jitter, no stalling, nothing. So I'm pretty confident that my extruder wiring and mechanicals are okay. But when I try issuing a command like G1 X100 Y100 E20 F100, the extruder might turn... or not. And when it doesn't turn, it's b/c the firmware isn't even putting power to the motor -- I've put my hand on it when this happens, and there's not even a bit of hum. And it seems completely random! I've tried prefacing the move/extrude commands with M101 (extruder forward), M108 (deprecated extruder speed command), M113 (current extruder speed command), but no dice. It doesn't seem to make any difference -- the firmware just seems to ignore the E command most of the time. Even when I've hit on a chain of commands that seems to succesfully move&extrude, repeating that same set of commands gets me movement without extrusion. I'm baffled.
Now, when I hit the manual "extrude" button, the extruder performs perfectly. No jitter, no stalling, nothing. So I'm pretty confident that my extruder wiring and mechanicals are okay. But when I try issuing a command like G1 X100 Y100 E20 F100, the extruder might turn... or not. And when it doesn't turn, it's b/c the firmware isn't even putting power to the motor -- I've put my hand on it when this happens, and there's not even a bit of hum. And it seems completely random! I've tried prefacing the move/extrude commands with M101 (extruder forward), M108 (deprecated extruder speed command), M113 (current extruder speed command), but no dice. It doesn't seem to make any difference -- the firmware just seems to ignore the E command most of the time. Even when I've hit on a chain of commands that seems to succesfully move&extrude, repeating that same set of commands gets me movement without extrusion. I'm baffled.