Heater working, pinch wheel shaft struggling

I had some nice progress since my last blog entry:

The heating element is up and running now for a few hours. We used un-isolated Nichrome wire embedded into Cerastil (more on that later).
You can see on the picture above, that I currently use some of that ugly glass-whool to isolate the heater barrel. I hope I find something heat insulating as sheet or tape soon.


Currently, I've the splined shaft installed which was described on the RepRap builders wiki. It runs fairly well until it gets some back-pressure from below. As result it'll shred the filament and won't move any more forward. Not that I was not warned that this is not optimal...