Ok, so whats wrong?

[Davek0974]

Hmm the stud looks a bit wimpy to fit a sleeve.

I've been looking at the ormerod for a few weeks now, the few vids showing it on YouTube seem to be pretty good, self replicating, the metal parts seem pretty standard stuff too. Had a chat with our son today and have agreed to go halves on one, should be here tomorrow.

Apart from the troubles with my trial setup, the base machine is destined to be a plasma cutter next week and once you start cutting steel, it gets messy very quickly, not good for 3d stuff. I was just mucking about with the the 3d while waiting the couple of weeks I had to for the plasma cutter to arrive :)

[Neale]

My extruder is a printed plastic unit, which feeds the filament through a PTFE spacer to the hot end. PTFE isn't the greatest material out as it does tend to deform slightly when hot and under pressure and I've had to drill out my spacer once or twice to stop jamming - it may be PTFE but if the 'ole up the middle ain't big enough, the filament won't get through no how! Out of interest, have you checked how consistent the diameter of your filament is? I understand that not all PLA is the same - some can vary somewhat in diameter.