CR10 SE Clogging Issue Inside Heat Sink

CR Series Creality CR-10 Series
1

I recently had to replace the print head on my CR-10 SE printer. After doing that, I started to get filament clogs between the extruder and the heat sink / print head. I have now replaced the extruder with no change. The clog appears to happen in the short (37.5 mm) length of PTFE tubing that fits between the bottom of the extruder and goes through the heat sink. It almost seems that it is missing a metal sleave at the top of the heat sync that would hold the Teflon tube in place. Does anyone have any suggestions on what I can try changing next?

2

Is the heat sink fan working?
Seems like heat creep up into the top of the heat sink.

The PTFE tube just sits on top of the heat sink to bridge that gap of the load cell sensor.

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3

Thank you. I will check the sink fan this evening.

Phil

4

Thank you very much for the suggestion. This whole thing started with an unfortunate Blob of Death. When I removed the Heat Sink Fan, there blocking the blades from spinning was a small piece of the plastic blob. I haven’t had a chance to test it yet, but even if it isn’t the only problem, it was certainly one of them.

Thank you again for the assistance. It is much appreciated.

5

Try preheating the nozzle
Remove the filament
Remove the nozzle
Press a piece of bowden tube all the way through from top to bottom, removing any stray filament
Reinsert the nozzle
Back off the bowden clamp 1/4 turn
Insert the bowden tube as far as it will go
Insert the lock in the bowden clamp
Tighten th clamp the 1/4 turn
Let us know how you get on

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6

Thank you for the tip. I used it to reset everything with a new Swiss Print Head. After cleaning out the Heat Sink Fan and getting it working, and then cleaning everything before replacing the print head, the printer is back to where it was prior to the blob of death. I still have some tuning to do, but at least it now functions.

Thank you all for the assistance.

7

I know im to late but I had this problem figured it out after 2 long months. The 2 screws holding the hot end in are too long. When you tighten the set screw to secure the heatbreak. It doesn’t allow you to tighten the left screw causing hot end to be canted . That makes it clog due to built-uppressure.