RepRap: Extruders are really hot...

I had some backup materials laying around from my original darwin extruder. To save me some time I decided to just use these, even though I knew the primary weakness.


I glued the PTFE into the drive mechanism like Adrian describes here.


I crimped and shrinked on the nichrome wire.



I also turned down the end so that it flattens the filament better.


I soldered up the thermistor and taped it all together.



I also used some ceramic tape for insulation.


It worked beautifully on the first print. However, as it cooled down the pressure stripped the PTFE, pushing the hot end slightly closer to the bed. On the second print the hot end dug into the bed and destroyed itself.




I am still learning that patience is a virtue.