So I think this hotend is at the "do not pass go,

3D Printing
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1

So I think this hotend is at the “do not pass go, do not collect 200 kg of filament” stage. Which is sad because before now its never given me any trouble. Thing looks like the kracken is trying to escape.

Anyway wanna make any bets on where the abs is leaking from? Its coming from between the insulator and heater block, which has a Teflon lined threaded rod in it. So it either cracked the Teflon and bolt and is leaking there or it burnt the Teflon before the bolt and is leaking down through that. Time to explore!

Also any ideas if this might be causing my elliptical holes. That hole was built parallel to the plate.

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ISTR that Teflon (PTFE) becomes very flexible at ABS-melting temperatures. Your teflon sleeve has probably slipped up allowing a gap between it and the heater block.

3

Tore it apart. Found a hairline crack in the liner just above where the threaded rod starts. I thought I could just replace the liner with some extra ptfe I had from a bowden setup but the original stuff is 3/16" instead of 6mm so I ran some 4mm stuff through it and converted this one to 1.75. Well see how it works now…

4

Elliptical holes in the horizontal plane are usually due to backlash or a loose component. Check your belts and tighten every thing up.

5

These are in the verticle. So its something in z. I dont think its a step error though because if I run calibration cubes the are the correct height.