Aaah. Both my printers are now out of action. Still trying to get the TwoUp to actually extrude. I’ve replaced the wooden extruder body with a printed one (and fastened it to the printed X traveller), got the fan going, but I can’t get any plastic going through other than by hand. Also got homing switches installed so I have repeatable positioning. But now the pulley on my Cupcake’s X axis is slipping so I’m unable to print any more parts. Tried tightening it in situ, but that didn’t work. Have to pop it out.
And I guess I will have to disassemble the TwoUp extruder and see what happened inside. Sigh. It was such a pain to assemble to begin with, because everything has to be put together all at once.
I think I have an old MakerBot gear that I can put on the extruder stepper to give it a bit more grip. Now that the fan is working I don’t think it’s heat creep up into the guide tube, I’m hoping it’s stepper related, or maybe the filament just not lining up after the gear.