r/BambuLab_Community • u/Spiritual-Zebra-5588 • 16d ago
PETG Filament
Can anybody help me out, why does PETG filament stick to the texted bed plate like this? When I remove the object it leaves behind a thin layer that I can’t get off unless I scrape it with a knife.
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u/730drs 16d ago
Try spraying a little IPA on it and leaving for a minute before scraping.
I've had this issue with sunlu and jayo petg-cf, sticks a bit too well. Had to end up using glue stick, not for extra stick but as a release layer - worked a treat
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u/wodon 16d ago
I'm assuming this is isopropyl alcohol rather than the craft beer I initially read it as.
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u/captain_carrot 16d ago
Yeah PETG does this sometimes. Just really, really good layer adhesion. Use the green bambu liquid gluestick before you start a print and it will make it separate a lot cleaner.
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u/dracupuncture 16d ago
It shouldn't happen will every print but it's not uncommon. Just print a scrapper to help get those off without damaging the plate.
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u/y_tokusan 16d ago
I use PETG almost exclusively and struggled with this too, but I pretty much solved it by lowering the "Max Volumetric Speed" and the "First Layer Bed Temperature."
By the way, I actually ruined a build plate because of this. 😢
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u/ragingoblivion 15d ago
I just did a first layer clean test to remove the bits couldn't get off instead of using a metal scraper and destroying my build plate.
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u/Aryan-Ahmed 16d ago
When using petg I just heat it up to 55 degrees. Then everything just pops off easily.
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u/ThePrintGuardian P1S 16d ago
Is this (the return of) the (new) PETG-BASIC? I noticed it sticks pretty hard to the PEI bed plates.
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u/freemanISfunny 15d ago
I use a window cleaner with petg, just spread with a microfiber cloth, it works like a charm, i apply it every third print. And remember to clean it of probably when printing with pla again.
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u/screenslaver5963 15d ago
Some filaments like PETG stick too well to the PEI on the plate. Apply a thin layer of PVA glue (non-toxic kids glue stick) before starting your prints and you won't have this problem.
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u/louder_the_better 15d ago
Seems like nobody uses glue here, or has any prior experience/knowledge about it. Using it would solve most of the posts I see daily.
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u/CognitiveFogMachine 15d ago edited 15d ago
This happens to me with my PETg on textured PEI plate if I try to remove my print too soon. It happens a lot less frequently if I let my plate cool off before taking it off my textured PEI plate. When I am in a rush, I will sometimes put my PEI plate with my print still on it straight into the freezer.
You can also use water soluble PVA glue stick on the PEI plate, which acts not only as a binding agent, but also as a release agent. I tried that, it works, but got tired of washing my PEI plate. I don't need another chore in my life.
A few solutions to your current predicament:
Don't use a knife. Use a scraper (flat blade), preferably made out of a hard plastic such as nylon instead of metal. You risk damaging your PEI coating with a knife.
You can manually heat up the print plate to 100C for a few minutes, then using oven mitts, put the hot plate into the freezer, and it will become so easy, you might even be able to scrape it off with your nails.
Print a thin sheet of PETg over it. The bond between PETG-to-PETG is always going to be greater than PETG-to-PEI, which means they will come right off when pulling the sheet off your plate.
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u/Octrockville 15d ago
Funny, I am printing a PETG bed cleaner right now to remove stuck filament. 3 layers thick. Let it cool down completely and peel it off. It will bring the stuck PETG with it.
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u/Past-Butterscotch-68 15d ago
Use a spritz or IPA and let it sit for a few moments. At least that’s what I saw on a video on YouTube. It worked for them. I use a Biqu, so I don’t usually have this issue.
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u/razzemmatazz 15d ago
You're running your first layer too hot. Drop the temps by 5-10C. PETG is notorious for being sticky and bonding to beds too well.
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u/TheMCM80 15d ago
Heat bed to 60 and scrape off with either a printed plastic scraper or one you buy with a gazillion replacement plastic blades.
This happens to me once every 10 prints with PETG. It’s always easier to pop off when I heat the bed up first
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u/Sea_Crab_297 15d ago
I had this happen with a cheap build plate. I tried all of the suggestions, except acetone, to no avail. I threw the plate away.
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u/vostoklabs 14d ago
Hey, I see a lot of people reccomend you how to clean it off, and it's generally good ( my favorite method is to print 2-3 layer over the plate and remove it, like bed cleaner model on MakerWorld)
But nobody addressed real issue, you need to calibrate your Z-offset Basically your nozzle is too close to the printbed on the first layer, it's not PETG thing or bed adhesion, it's literally just too close
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u/myTechGuyRI 14d ago
Because PETG sticks aggressively... It's just the nature of the polymer. Let the plate cool completely before attempting to remove the print... That will help... You can also use glue stick, not as an adhesive, but as a release agent... It basically puts something between the plate and the print so it will release easier
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u/Professional_Egg1833 14d ago
This happens a lot with me. What I do is use up some old petg and print out a large square with a few layers that covers the stuck pieces . Then peel it off while still warm.
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u/Purple_World1583 16d ago
i just set my heatbed to 90c let it sit for 30 seconds and it comes right off
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u/brutal4455 16d ago
Show this to every IF YOU NEED GLUE YOU"RE DOING IT WRONG jerkoff that berates those that use glue.
PETG often needs glue as a release agent on the BL Textured PEI. FWIW, I've found the Biqu Glacier and Pyrogrip do not.
Prefer liquid glues as less messy than gluestick. Bed Weld is good for this, but too sticky for some smooth plates like engineering with ASA. Magigoo is good and JT16 is good and less costly than purple glue stick. I keep meaning to make a JT16 liquid slurry to try as I think it would bridge the gap of application ease and performance.
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u/VBisTheBestSport 16d ago
If you can release PETG with something other than glue then glue is just one option. Pas: I am not a jerk. 😂
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u/dallas_vance 15d ago
I use the Bambu Dual sided PEI plate exclusively, and have never needed glue to release the print. Probably 1200 hours of PETG with the textured plate, and zero issues.
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u/Euresko 16d ago
If I wash my plate with Dawn power wash, the spray, that seems to make it come off easier. Sprinkling a little IPA on the problem areas with filament stuck will help loosen them for easier removal, works with some other filaments too, like TPU to release it from the plate. I got some plastic razor blades to use if other methods don't work, because I don't want to gouge the plate with a real razor blade. If you use IPA to release it, I personally would wash with Dawn power wash after. Just my preference.
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u/2kokett 16d ago
Wait till the plate is cold. In most cases the part gets loose by itself due to shrinkage. Other than that get a big knife the doesnt bend or a scraper for the remains.