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Repetitive Print Head Clogging

I am trying to make a Dymaxion Globe and need to print the corner pieces - Except after printing the first four pieces the nozzle clogs between the tube and the nozzle insert part way through the print. Obviously lost time, money and effort as I clean the nozzle, set up and restart the print only to have it fail. I have tried - 1. Different Materials 2. Different rolls of filiment 3. Raising nozzle temp for easier extrusion 4. Lowering nozzle temp to reduce heat creep back through the nozzle 5. Trimming the tube for better fit 6. Swearing mightily in multiple languages. Any Suggestions/Ideas/Hints?

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Thanx. Ordering tonight

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Hi. I didn’t like how often the BOXZY nozzle would clog, so I replaced it with an E3D V6 print end.

The advantage of this is that there is an active cooling fan in the E3DV6 and a longer heat break, so the beading/blocking problem was eliminated.

I hope this helps.

I also wrote a guide on how to do this replacement. (Please look under comunity made guides, “Replacing the BOXZY default 3D printer head with an E3D V6 print head”.

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Yeah, that's frustrating. It definitely sounds like an extrusion pressure issue. Are you running the fan at at least 10% during the print? Have you ever had this nozzle apart? Is the tube fitting on the cold end of the nozzle loose and/or spins with the tube? What layer height/thickness are you printing at?

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Every time the nozzle clogs and forms the bead between the tube and the nozzle I have to take it apart. Printing at .2mm layer thickness. Fan - oops. Not sure, will try again and make sure later today then post the results. Thanx for the input

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Well. That’s interesting. I ensured the fan was On and set at 25%. Printed well. However, as I watched the nozzle temp and fan speed seem to be self adjusting. Fan 11-15%. Temp 210-240 degrees. What’s up with that?

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Fan settings during the print are controlled in the 3d print gcode. You can edit them in the slicer. You can change the fan speed during a print manually, but it will eventually reset to whatever is in the gcode. Temperature, however, should not fluctuate that much, unless you have a different temperature set in the slicer for the 1st layer. Are you using the original heater cartridge? Have you made any EEPROM adjustments?

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Craig Sorensen will be eternally grateful.
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