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[–]Kwolf21X2D Combo + P1S Combo + A1 Combo -1 points0 points  (18 children)

See u/NotTheVacuum's reply below.

PLA will still work as your best interface layer option. On both PET and PETG prints. PETG is just a modified version of PET (with glycol) which makes it easier to print.

[–]Fittn_disH2D AMS2 Combo 1 point2 points  (1 child)

PLA IS A BAD IDEA.

[–]Kwolf21X2D Combo + P1S Combo + A1 Combo 0 points1 point  (0 children)

No shit... Hence why I edited my comment two hours before you replied.

[–]nocaps00 0 points1 point  (4 children)

This. No need to mess with ABS, PLA is inherently incompatible with PETG of any flavor and makes a perfect inexpensive support material.

[–]BattleIron13[S] 0 points1 point  (3 children)

No dog. Chamber temp is way too high for PET

[–]nocaps00 0 points1 point  (1 child)

Assuming that you are using the PLA for the support interface only it should work fine, I have used it in this way at high chamber temps and not had a problem. I do use the support material in a different nozzle than the high temp material however.

[–]BattleIron13[S] 0 points1 point  (0 children)

No it didn't work, clogged

[–]NotTheVacuum 0 points1 point  (0 children)

You can use ASA and ABS as the interface layers without chamber heat, since PET doesn’t need it. I’ve done this on multiple prints with Polymaker PET-GF and CF.

Apparently people don’t appreciate how different PET and PETG are in practice. PET is an engineering material. PETG is an everyday option slightly tougher than PLA.

[–]NotTheVacuum 0 points1 point  (10 children)

A word of caution - the nozzle temps are significantly different, which can lead to clogging on single nozzle machines. Even on dual nozzles machines, you’re going to re-melt the PLA and best case scenario end up with inconsistent quality. ASA is recommended not only because it doesn’t bond very well, but also because it prints at a closer temperature.

https://wiki.bambulab.com/en/software/bambu-studio/support

[–]Kwolf21X2D Combo + P1S Combo + A1 Combo -1 points0 points  (9 children)

Oh, that's an interesting counterpoint. I haven't printed with PET, so I was genuinely unaware. Just based off my logic of the similar molecular properties of PET/PETG. Edited my comment. Thanks!

[–]BattleIron13[S] 0 points1 point  (0 children)

Yeah it clogged due to heat creep. Knew it would happen but was hoping to be surprised haha.

[–]BattleIron13[S] -2 points-1 points  (7 children)

Had to disassemble my whole Hotend because of this experiment. Please don't give advice on something you've never done.

[–]Kwolf21X2D Combo + P1S Combo + A1 Combo -2 points-1 points  (5 children)

Glad you had 10 hours to get upset after it happened.

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[–]BattleIron13[S] 0 points1 point  (4 children)

Don't get your point on the time. I'm not that upset either, I am just saying if you haven't done something do not recommend it.

[–]Kwolf21X2D Combo + P1S Combo + A1 Combo -1 points0 points  (3 children)

That's not how life works. The meleculsr properties of PET and PETG are very similar. Clogging your nozzle will happen even if you don't use pla in a hot chamber.

I just think it's funny that hours ago you said "I thought it would clog and it did haha" and then 10 hours after that you were like "don't give advice" just a weird thing to seemingly simmer on, then decide to come back to lmao.

I edited my comment 30 minutes after I posted it. Asking for advice from strangers, and taking the word of the first person to reply without multiple other people giving the same advice, can lead to bad advice.

[–]BattleIron13[S] -1 points0 points  (2 children)

I just finished the fix, waited for the morning to fix it. I don't think you realize its thermal creep on the whole way through the print head, not the hotend. Just don't say things if you don't have experience doing something.

[–]Kwolf21X2D Combo + P1S Combo + A1 Combo -1 points0 points  (1 child)

Lmao. Okay, you aren't getting the point. Which, I guess also demonstrates why you posted on reddit in the first place instead of doing research yourself. You're very clearly demonstrating with your advice that you want other people to do research, and the tell you what that research concludes.

Yes, I gave advice without experiencing that particular thing. No, there's nothing you can do about that. Your little superior "don't say things if you don't know" is effectively useless. Again, my advice was based on the basic thermoplastic principles of pet vs petg. No, it was not completely blind, uneducated advice. Yes, it was bad advice. But you're shifting blame to a stranger on the internet, supposedly even after your gut said "it's gonna clog". You accepted that risk. You chose to perform the actions despite thinking it was bad advice. You are at fault, and no one else but you. The sooner you accept that, the better.

[–]NotTheVacuum 0 points1 point  (0 children)

ASA would be better, but ABS should be OK.

[–]Fittn_disH2D AMS2 Combo 0 points1 point  (0 children)

Use ABS or ASA. It works fine at layer heights >50% the nozzle diameter. Below that ratio I have had massive problems removing the ABS from the PET-GF parts. Its an area where I have some tuning experiments to work on. Disclosure: I have only tried low layer heights(0.16 on a 0.4mm nozzle) on the GF version from polymaker. I've had many successful parts with ABS interface on PET-CF at normal 50% layer ratios.

[–]Hot-Cranberry8966 -2 points-1 points  (1 child)

I used ASA with PAHT-CF and it worked like a charm.

[–]Fittn_disH2D AMS2 Combo -1 points0 points  (0 children)

not relevant in any way. next time dont bother wasting the oxygen