I just yesterday had the same problem with my Replicator1 dual extrusion:
Nozzle Clog, working for smaller prints, failing on larger prints at the
Here is what I figured out: I disassembled the extruders to clean them,
also took out the nozzle where ABS was stuck inside and cleaned with a heat
gun and acetone. What made me wonder was that it worked afterwards – but
only if I pushed the filament gently by hand inside. It did not properly
worked without helping hands.
So I disassembled everything again and found out that the Ring with the
grip of the left extruder that sits on the shaft of the stepper motor was
lose. The nozzle was ok, the stepper motor was ok, but there was just no
filament pushed into the nozzle.
I think now that this is a design problem of the extruder (see my nice
drawing): the ring has a hex-screw to connect it to the shaft of the
stepper Motor (BTW: I think this at all is not a good solution). The shaft
of the stepper motor has a bevel that is not big enough so that the screw’s
bottom cannot press on the bevel but on the blank shaft, the ring can come
loose from the shaft, the filament is not pushed into the nozzle and the
nozzle gets clogged. Puhh.
I tightend the screw and It worked again, but its only a matter of time
when it will come loose again.
Why is it only happening on the left extruder? The right one seems to be
build differently: The ring sits properly on the bevel of the shaft. I can
take some photos if needed. Has anyone experienced the same or more
Am Dienstag, 9. Oktober 2012 07:56:02 UTC+2 schrieb Elbot:
> Sorry, moisture? How can that clog stuff up? Please explain. I was a very
> poor physics student.