Print partially comes off of build plate during print

Hello,
I’ve been having some issues printing flying serpent by cinderwing3D. The majority of the print goes flawlessly but then one of the wings comes loose during printing and it fails. It is only this one part of the model that comes loose. It is printed on the textured PEI plate which is cleaned with rubbing alcohol before each print and bambu studios adds a respectable brim to the print (which also partially comes off around the wing). I have tried enabling z hop when my first attempt failed at 98% but it has not helped. Many other prints and models have been successful with this machine and build plate. Please let me know how I could get this to print successfully.

Reorient the model and try again.

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wash plate with dish soap and hot water. dry. use glue. i like the bambu liquid glue. you can do a full cover of the plate and then do an alcohol wipe between prints.

I can’t tell from your description of how the brim separates from the wing, but there is a setting to change the gap between the brim and the model. I think it defaults to 0.1 or something like that, you can try changing it to a smaller number, which increases post-processing time but might result in a working print.

The main thing you’ll want to troubleshoot is how the print is failing, i.e, is it because the model needs a support there? Is it due to warping due to non-enclosed (presumably) chamber? Is it the filament type you’re using is prone to warping or hasn’t been tuned? There’s a lot of possibilities here unfortunately.

You can use Bambu Studio to also cut up your model to print a specific section. This helps a lot with troubleshooting since it saves time on reprinting parts of your model that always print fine. Definitely consider doing this.

I have cut out the part that fails, will reorient and try again. For more context, the part knocks loose along with the brim. it doesn’t come completely off the bed but wiggles badly. The filament is pla and I have gotten good results with the same roll before. It was dried before I printed with it.

Ooh ok I would probably classify this as a first layer adhesion issue.

The brim width can be increased which might help. The brim gap can be made smaller which might help. You could also try bumping up the bed temp a little bit.

Have you also thought about using the “cool plate” which is completely smooth? I find that the smooth plates have better holding ability.

I’m not sure what your model looks like, but if I’m interpreting your write up, it sounds like a V shape with little surface contact with the plate. Adding a wider brim, adding support, can help increase surface area onto the plate. The plastic you’re printing is undergoing temperature changes so as it cools and contracts it can cause warping which can lead to lifting from the build plate.

Check your first layer in the slicer. Sometimes it is necessary to move the object at the Z axis down by 1-2 mm under the plate to create a larger contact area.

If you are using PLA then turn off the aux fan in the filament settings. That will almost always cause a corner of a large model to lift.

I have tried reorienting the model, using glue on buildplate, decreasing brim-object distance, and I don’t use aux fan. This hasn’t helped as the part still shakes loose. This model doesn’t require supports and has a decent surface area. I’m thinking the next best thing to do would be to decrease acceleration for the whole print and/or slow down printing on the wings to avoid shaking them too dramatically. I would also like to increase brim and decrease brim-object distance to zero just for the wings but that is not possible for some reason. You can only edit those settings when the object is split to objects. Split to parts doesn’t allow edits to brim. For some reason when I use split to objects, bambu studios gives a “no layers detected” error. I’ve talked to others who print this model on their bambulabs printers and split to parts works for them. Not sure why it doesn’t for me.

Whats your bed temp & Did you try increasing it if possible? Is problematic section of the part close to the edge of the buildplate? It might be cooler in that area & causing the adhesion issue.

Buildplate temperature is 65 c and I haven’t tried increasing yet. The problematic section is towards the middle of the build plate.