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charlespax

Paxtruder-0.1

by charlespax Oct 4, 2009
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Interesting design. How often do you have to tighten the adjustment screw as the delrin wears down?

I've never had to tighten it due to wear and have never noticed any. Delrin has very low friction with ABS and is pretty strong. I tried this with a bit of PTFE, which got a channel squished into it, but also did not wear.

You should add a 606 bearing on to the end of your motor shaft so that the linear pressures that you place on the shaft with the delrin wont kill your motor. That's how mine was killed (over-tightened idler-wheel). Also, it makes the plastic flow much more consistent.

Already on it. I have the 606 mod in the extruder I'm currently using and it's a nice improvement. I'll thingiverse a new design once I fix the acrylic cracking problem. I might also include a mod that will obsolete the thermal barrier retainer.