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Thanks for providing a detailed counterpoint, gave me some ideas. Next thing I will try is a textured sheet. For additional context, my main issues with PETG w

Thanks for providing a detailed counterpoint, gave me some ideas. Next thing I will try is a textured sheet. For additional context, my main issues with PETG were prints detaching from the printing bed midway through (but i fixed that one by adding brims to my prints + using printing glue on the bed, and a textured sheet would help with that even more), and a more major one was the nozzle getting strings and eventually the material sticking to it and accummulating to the point of the nozzle getting clogged on the outside/unusuable (recovering from which would require aborting the print and doing the 10-min long cleaning ritual with heating up, rubbing alcohol, brushes, etc).

mitthrowaway2 3y ago
This might sound like an ad, but the textured sheet (https://www.prusa3d.com/product/double-sided-textured-pei-powder-coated-spring-steel-sheet/ https://www.prusa3d.com/product/double-sided-textured-pei-po...) is somehow a miracle when it comes to printing PETG. I can't get PETG to work on a smooth bed either, but with the textured sheet, it works every time. All it takes is to keep the bed clean with an alcohol wipe, and warm it up to ~85 C during the print. Not only does it hold very well during printing, it practically slides right off the bed when the print is finished and the bed cools down. PETG does tend to curl and stick to the nozzle, that's true. I find the main culprit is if it oozes while the printer is warming up. While I'm waiting for the printer to reach temperature and the print to start, I make sure to remove any filament that might be dribbling out the nozzle using pliers or a wire brush until either the print starts or the nozzle pressure decreases enough for the oozing to stop. As long as the nozzle is clean when the print starts, it shouldn't have an opportunity gather up more material during the print. On the other hand, when 3D printing, getting off to an imperfect start will always tend to snowball toward a terrible end. Good luck!
- filoleg 3y ago
  Yep, I actually ordered that exact same textured sheet you linked, and it got delivered a couple weeks ago, but I am yet to try it. I still want to make PETG work for me, as the prints i actually managed to finish with it were great. > While I'm waiting for the printer to reach temperature and the print to start, I make sure to remove any filament that might be dribbling out the nozzle using pliers or a wire brush until either the print starts or the nozzle pressure decreases enough for the oozing to stop. Yeeeeppp, been doing that exact same thing, and it was working quite well. But not going to lie, I felt a bit destroyed on the inside when I still got the nozzle clogging issue about 10 hours into a 16hr print I had going. I wrote it off as a one-off, but I have been hesitant to try another 16hr-long print with PETG since then (until i at least get the textured sheet set up). Thanks for your comments in this thread btw, they definitely highlighted quite a lot of issues I had and potential workarounds.

mitthrowaway2 3y ago

This might sound like an ad, but the textured sheet (https://www.prusa3d.com/product/double-sided-textured-pei-powder-coated-spring-steel-sheet/ https://www.prusa3d.com/product/double-sided-textured-pei-po...) is somehow a miracle when it comes to printing PETG. I can't get PETG to work on a smooth bed either, but with the textured sheet, it works every time. All it takes is to keep the bed clean with an alcohol wipe, and warm it up to ~85 C during the print. Not only does it hold very well during printing, it practically slides right off the bed when the print is finished and the bed cools down. PETG does tend to curl and stick to the nozzle, that's true. I find the main culprit is if it oozes while the printer is warming up. While I'm waiting for the printer to reach temperature and the print to start, I make sure to remove any filament that might be dribbling out the nozzle using pliers or a wire brush until either the print starts or the nozzle pressure decreases enough for the oozing to stop. As long as the nozzle is clean when the print starts, it shouldn't have an opportunity gather up more material during the print. On the other hand, when 3D printing, getting off to an imperfect start will always tend to snowball toward a terrible end. Good luck!

filoleg 3y ago
Yep, I actually ordered that exact same textured sheet you linked, and it got delivered a couple weeks ago, but I am yet to try it. I still want to make PETG work for me, as the prints i actually managed to finish with it were great. > While I'm waiting for the printer to reach temperature and the print to start, I make sure to remove any filament that might be dribbling out the nozzle using pliers or a wire brush until either the print starts or the nozzle pressure decreases enough for the oozing to stop. Yeeeeppp, been doing that exact same thing, and it was working quite well. But not going to lie, I felt a bit destroyed on the inside when I still got the nozzle clogging issue about 10 hours into a 16hr print I had going. I wrote it off as a one-off, but I have been hesitant to try another 16hr-long print with PETG since then (until i at least get the textured sheet set up). Thanks for your comments in this thread btw, they definitely highlighted quite a lot of issues I had and potential workarounds.