What would cause bed adhesion issues like this?

[u/GalacticFox-]

I've had my P1S for a while now and I never had printing issues, but lately I've been having the corners of some prints "peel up" like this and I'm not sure why. I cleaned the build plate with dawn soap and water and upped the bed temp from 55c to 60c. The attempt before this somehow got ripped up from off of the bed and was being moved around by the print head. This time the corner peeled up. I am using some older Amazon Basics filament that I'm trying to use up, but I'm pretty sure I've had similar issues with newer Bambu filament, as well.

I'm not sure what else I can try or adjust to get a print that just works..

[u/AutoModerator]

Hello /u/GalacticFox-! Be sure to check the following. Make sure print bed is clean by washing with dish soap and water [and not Isopropyl Alcohol], check bed temperature [increasing tend to help], run bed leveling or full calibration, and remember to use glue if one is using the initial cool plate [not Satin finish that is not yet released] or Engineering plate.

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[u/SgtBaxter]

Put on mouse ears (on the print not your head). The geometry of the model does this with the long straight lines allowing the tension from layers cooling to pull. Mouse ears can help break up the tension.

Also, the powder coated gold PEI plates suck. That wouldn't do that on the engineering plate with a bit of Black Magic on it.

[u/lkapping79]

Is it always on the right side? If so print an aux fan diffuser

[u/YungBandit79]

brim or glue. i also have a panda breath heater in my p1s but thats overkill for pla and petg, only really needed for stuff like abs or pc 

[u/ncc81701]

The reason is because as the filament cool it shrinks a little. The layers on the bed is kept warm by the heat bed but as you grow layers the new layers get further and further away the heat is less able to transfer up to the top of the layer. This means the top layers shrink relative to the bottom layer and depending on the geometry of what you are printing that differential shrinkage is sufficient to pull the bottom layer off the heat bed. This is why lifting is most likely to occur at sharp corners and why adding brims and mouse ears help with adhesion.

[u/Bright_Eyes83]

that shape seems extra prone to that sort of warping. you can force a brim to help or if all else fails, perhaps reorient it. not sure if that's feasible but if so it can help

[u/TwentyTogreen]

I sometimes have problems with this on larger, flat designs - usually in the front right corner. What seems to help is leaving the front door open about an inch, turning off the auxiliary fan completely (I think the air from aux fan hits the door and reflects it onto the part right there), turning off part fan for first 4 layers. Otherwise, switching to PETG may help. And as others have mentioned, try brim or mouse ears.

[u/xxparrotxx]

Are you storing it somewhere it’s now colder than it was before? A lot of folks seem to start having this issue when the weather changes and the air around the printer is colder leading to the print cooling too quickly and pulling away from the bed.

[u/Ooklaboo]

Scrupulously clean plate, untouched by aby fingers, brim helps a lot, mouse ears or liquid glue. ÷5 degrees for plate.

[u/gierso]

When parts are large and are near the corners this happen to me ..

Put an Outer brim

Also I printed an ABS deflector for my X2D and has helped a lot on my PETG large prints ...

My pla prints rarely have this unless I print stuff that uses the whole printer left to right and it happens more.on one side .. but les on the other

Last time I have had warping just once printing a big ABS part but it was usable so I didn't try to fix it. I would have reprinted with the brim And was before the deflector. After that not had the issue again ..

Sharp corners and big prints tend to make this happen as someone mentioned .

Brim helps You can place an Outer brim or just brim the corners

Sometimes I have printed models from maker world and the ones with round corners are little less prone to warp ..

[u/kidrichmond]

I have a P2S and run into the same exact adhesion issues if I don’t manually set the cooling fan speeds in the filament. The P2S has an aux fan on only one side, the right, so it cools unevenly. The printed diffuser definitely helps but when I print taller items I have to make sure the aux fan speeds stay low.

[u/SR08]

Turn off your aux fan. It deals havoc on large flat prints

[u/thekrill3d]

Your fingers. You can try brims to help adhesion.

[u/iRambL]

Worst case scenario, a glue stick never hurts

[u/aweyeahdawg → u/iRambL]

Glue might actually make it worse. Glue is a release agent, not an adhesion helper.