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Cooperg20011

UMO+ Heater Block leaking - Existing fixes not working

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My question is if anyone can try and walk me through all the possible causes of my leak. I noticed that after I built the printer there was a pool of the silver metallic PLA appearing on top of the heater block, after finally dissambling the print head and cleaning it I can confirm that the leak is coming up from within the block itself. When I reassembled the print head and hotend I made sure all pieces are as tight as possible without tools.

edit:

I have been printing with the stock Cura settings for this except for changing infill and layer height. As a troubleshooting step I reduced the print speed from 60mm/s to 30mm/s and printed a 10mmx10mmx10mm cube but still had the pool of PLA grow. The only other issue I could find on the forums that is like mine also had a printer using the metallic silver PLA which I think could be the cause of the issue.

Edited by Guest

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I don't like the way it is explained in the manual, it is a source of trouble...

This is what I recommend:

  1. Screw the nozzle in the heater bloc, but NOT flush against the heater bloc -- leave approx. a 1mm gap
  2. Screw the brass pipe until it reaches the nozzle -- do not apply excessive force as it is fragile
  3. Now tight the nozzle against the brass pipe with a wrench. You don't have to over-tighten it, 0.5 Nm should be enough. At the end there still should be a gap between the nozzle and the block, if you are tightening against the bloc you will have leaks!
  4. Optional, but recommended: repeat the last operation when the hot-end is at temperature (don't burn yourself!)

Your bloc will never leak again after that ;)

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So I made the mistake of not tightening the nozzle more while it was hot but the leaking has all but stopped and I just tightend the nozzle furthur while hot and that appears to have been the problem

edit:

Need to do one more clean up on the hotend do to some burned PLA but the leak is fixed

Edited by Guest

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