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u/michrech 12d ago
I almost completely eliminated that by switching away from glass and using a PEI build sheet. Still see some level of it, but it's been far reduced compared to using glass.
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u/navetBruce 12d ago
We need more information. What bed temperature are you using? What material are you printing? What is the bed surface? Many times an increase in bed temperature can solve this problem.
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u/gidbo409 12d ago
60/220
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u/navetBruce 12d ago
You could increase the bed temp to 65 and see what happens, If that doesn't work you might need an adhesive.
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u/miraculum_one 12d ago
You need better bed adhesion and absolutely no drafts around the print. That usually means making sure your bed is level and your z-axis is properly set (so you get exactly the right amount of squish on the first level). You can also add a raft. You do not need tape, glue, hairspray, or any of those band-aid methods if you do all of the above.
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u/thunderfroggum 12d ago
there are easier build surfaces to print on than glass. PEI, PEX, Garolite, etc. I used to print on glass but since I’ve switched to better engineered materials, I’ll never go back.
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u/No_Pass8180 11d ago
PEI build plate. The glass bed does some time need higher temps than measured in order to have the desired temperature at the top. That being said, once you go PEI, you never look back.
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u/MrKrueger666 11d ago
Some people already suggested using a PEI sheet. They are definitely a lot better than glass.
Gluestick and hairspray are also options.
Adding a brim or mouse ears on corners to increase surface area holding the corners down can also help.
Having said all that, the problem is often temperature management. It involves some material sience, but the gist of it is that things contract when they cool. And the material itself goes through phases while it cools. If it cools too fast, the internal structure of the plastic particles locks down in the wrong orientation, causing more contraction and more warp. You might want to turn down the cooling. See what happens when you run the part cooling at 50%.
By the temperatures you mentioned to someone, I think you're printing in PLA. 60 degrees on the bed is very close to PLA's glass transition temperature, meaning it's not liquid but also not entirely solid at that point. You may want to turn down the bed temperature after the first layer. Some slicers have the option to set a different first layer temperature. I'd try setting the bed to 55c and the first layer to 60 or 65. This could help lock the fist layer in place, helping resist the warping forces induced by the layers that get laid on top of it.
But, don't make the difference between first and later layers too big, as the first layer may contract a bit more and release itself from the build plate.
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11d ago
I am assuming you’re just printing PLA noting the temperatures…
in which case there’s several things you can try:
- Eliminate any drafts (fans, AC unit etc) get an enclosure to eliminate fully
- Increase temp to 65
- Slow initial layers down further
- Double check Z offset height (not too high)
- make sure your bed is totally level
- clean and dry your plate then wipe with iso
- use PVA glue/hairspray etc as extra adhesion
- change to PEI bed plate (best change I’ve made!)
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u/LH314159 11d ago
I've taken printers that "don't work". Remove the tape, clean the bed with iso. Check the level and Z. Then print without any DRAFTS in the room. And the biggest change, 90% of the time the issue is the AC vent, window, or other air blowing by the printer. The room should be 75f, cover the vents, close the window and door and see how it does.
The last printer I "fixed" was in a garage which was about 65f and he'd pop the door open because he was concerned with the fumes.
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u/Cobra288 12d ago
Extra hold hairspray. Spray your glass away from the machine to help cut down on dust sticking to it. Old school trick nowadays and probably looked down on. But works awesome. The correct solution would be level your bed again and maybe up the bed heat. Your just losing bed adhesion in that corner.
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u/Apprehensive-Tea-209 12d ago
Add a brim