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I keep getting a jam where the PTFE tube meets the top of the v6 hot end. I have the PTFE tube all the away in but for some reason it gets a bulge at that spot and will stop printing. It happens with or without retraction. Any ideas?

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Hellrazor
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1 Answers1

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Filament sometimes get stuck on the rim of the PTFE tubes inside the heat sink. Josef Prusa from Prusa Research has published a document on how you should chamfer the PTFE tubes for his printers:

Josef Prusa PTFE tube chamfering

Maybe chamfering your tubes works for you too.

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