Unsolvable warping when printing Gridfinity in PETG.
Hey there,
I've been trying to print a fairly simple 2x3 Gridfinity bin in PETG, but I can't get rid of the warping that occurs during cooldown.
My setup:
- Prusa Core One+
- Prusament PETG (tested Orange, White, and Anthracite), dried
- Satin sheet
The print itself goes perfectly. The issue only starts once the bed turns off. During the cooldown phase, the edges of the part lift and warp upward. I even switched to PLA on the smooth sheet to rule out the filament, but the result is the same.
What I've tried so far:
- PLA instead of PETG, on both smooth and satin sheets
- Cleaning the plates with fragrance-free dish soap and hot water
- Bed temperature sweep from 55°C to 90°C in 5°C steps
- Nozzle temperature sweep from 240°C to 265°C in 5°C steps
- 3D Lac on the bed
- Reducing print speed to 80 mm/s and 40 mm/s to let temperatures stabilize
- Printing with the door open and closed
- Covering the printer with a blanket after the print finished
- A custom G-code that ramps the bed down by 5°C every 5 minutes post-print
At this point I'm out of ideas. It's such a simple part... any suggestions would be hugely appreciated.
RE: Unsolvable warping when printing Gridfinity in PETG.
A large brim?
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Unsolvable warping when printing Gridfinity in PETG.
I'd really really like to avoid using a brim, because it messes with the print. That being said, I have used a Brim with 0 mm separation from the model, and it didn't help either. The brim lifted with the model's corners.
RE: Unsolvable warping when printing Gridfinity in PETG.
May we take a look at the 3MF file for analysis?
Mods for Core One: Core One HT 450 degrees, Comfortable display , Very fast print start and Reducing noises
Mods for Prusa XL: Very fast print start
RE: Unsolvable warping when printing Gridfinity in PETG.
At this point I'm out of ideas. It's such a simple part... any suggestions would be hugely appreciated.
You can add mouse ears to the corner, or a wide brim. Also, increase the number of walls to 3 or 4 and switch to gyroid infill (around 10-15%)
RE: Unsolvable warping when printing Gridfinity in PETG.
May we take a look at the 3MF file for analysis?
I have to admit, I am not sure where to upload a model, because the "Add Media" dialogue doesn't allow me to upload a .3mf.
At this point I'm out of ideas. It's such a simple part... any suggestions would be hugely appreciated.
You can add mouse ears to the corner, or a wide brim. Also, increase the number of walls to 3 or 4 and switch to gyroid infill (around 10-15%)
I have also tried 4 walls, and gyroid infill, but the result is the same. Mouse ears suffer from the same problem brims do for me.
Furthermore, here's some images of the warping. Right until the print cools down, the part is perfectly fine.
RE: Unsolvable warping when printing Gridfinity in PETG.
You have to zip up most files for the forum to accept them before they will be attached.
RE: Unsolvable warping when printing Gridfinity in PETG.
Thank you for letting me know! This is it gridfinity_c1_warp.3mf.
RE: Unsolvable warping when printing Gridfinity in PETG.
Unfortunately, I can't print the modified 3MF file because my Core One is disassembled right in front of me and I don't have any Prusa PETG.
Try printing the 3MF file I've attached.
Let me know if anything doesn't work out.
Mods for Core One: Core One HT 450 degrees, Comfortable display , Very fast print start and Reducing noises
Mods for Prusa XL: Very fast print start
RE: Unsolvable warping when printing Gridfinity in PETG.
Thanks for taking the time to prepare the settings for me. The warping got a tad better, but not substantially. Furthermore, by using these settings, some VFAs habe been introduced.
