Build-up on the nozzle when printing with PETG

Snapmaker 2.0
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I had not seen that last one. The Amazon one says “Heat resistant up to 200℃” which of course would not be good to use in the heatbreak (the one on eBay appears to be the same one).

The last one does say up to 260C. I’ll check into that one.

UPDATE: A meter of it shipped to the US is €75.29. I guess I’ll keep hunting.

Thanks!

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There’s only one kind of PTFE, they are all the same. Thermal ratings are not a black/white it’s ok or not thing. It’s a gradient.

PTFE is generally considered to begin to decompose as low as 260C. However, by some studies, it can begin as low as 200C.

If you are heating your filament to over 260C you need an all metal hotend without a PTFE liner. If you are concerned with trace decomposition at 200C+ then you should be using a fan and ventilating outside.

This also applies to nonstick cookware as well.

Edit: you saw nothing lmao

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I get what you’re saying. Well except the part about the “all metal filament” - just kidding I know what you meant to say there :wink:

If I decide I need temperatures above 260 I’ll get an all metal heatbreak.

Thanks

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An all-metal filament prototype with GMAW-based print head: JMMP | Free Full-Text | Applications of Open Source GMAW-Based Metal 3-D Printing

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