26 Reply by BFresh

  • BFresh
  • BFresh
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Re: Which printable replacement head?

Ok, I figure it out. It is caused by the hot end not being assembled correctly.

This can happen if you take apart your hot end to try and clean it, or buy a self-assembly j-head.

If all the parts in the hot end are not screwed up enough so that they all touch, you will get a gap that will fill with melted filament and block.

The image below shows the filament removed from a j-head after I didn't assemble it correctly and it blocked. The wider filament on the left would have been in the PTFE sleeve. Then you see the largest diameter part of filament, this is where the gap between the PTFE sleeve and nozzle was and is the blockage.

The second image shows the same problem, but with the standard solidoodle hot end.

I've reassembled the J-head and so far so good with extruding filament only. About to a test print now...

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Industrial Designer
Fresh Design Works (UK)
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27 Reply by BFresh

  • BFresh
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Re: Which printable replacement head?

Nope. Same problem. Think I'll post a new thread about this

Industrial Designer
Fresh Design Works (UK)
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28 Reply by BFresh

  • BFresh
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Re: Which printable replacement head?

Think I've solved it. Turns out I had the filament diameter set to 0.5 in Slicer settings> Printer settings > Extruder 1

Doing a test print at the moment, 45 mins in and half way through it seems to be ok

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Fresh Design Works (UK)
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29 Reply by Heartlander

  • Heartlander
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  • From: Kent from Kansas City
  • Registered: 2013-06-23
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Re: Which printable replacement head?

PLay with the COnfigure in SLicer. I have a seperate set of 1,2,3 and 4mm slices all with half-speeds, etc. to resolve this kind of problem and, hopefully, work with rubber PLA.

Here's another tip. To emulate what 2N2r5's little piece of tubing does, use a 3MM lock nut (plastic side up). I had a couple extras after replacing my stock jigsaw with the MK5. It works like a charm and is heavy enough and just the right size to not get knocked out of position. Haven't had a kink since, with ABS.

Robox printer, HICTOP (Prusa i3 variant) Model 3DP17 printer, ELEK 2.5W laser engraver, AutoDesk 123D Design, Windows 10

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