I’m encountering consistent warping issues while printing with Bambu Lab Matte PLA on my brand new Bambu Lab A1. The model I’m printing is a simple hollow cuboid with a 45-degree chamfer at the bottom (3MF file attached). The bed temperature and hot end temperature are set to the default settings in Bambu Studio (I’ve tried both the 0.20mm and 0.12mm built-in profiles). I’ve also tried reducing the bed temperature to 55°C after the first layer, but the issue persists. Bed leveling is enabled.
I’m using Bambu’s textured PEI plate, which I clean regularly with warm, soapy water and scrub with a scouring sponge. I haven’t used a glue stick yet. I’ve also tried disabling the fan for the first three layers, and there are no significant drafts or active fans/AC in the room. Additionally, I’ve experimented with changing the seam location and even switched to a new spool of Bambu Lab Matte PLA (just a different color), but I haven’t noticed any improvement.
The only somewhat successful prints have been when I manually added supports to all the 45-degree corners at the bottom. However, I feel like there should be a way to resolve this without needing supports for such a basic shape.
I’ve attached a photo showing the warping/curling I’m experiencing. The initial layers seem to adhere well (I’ve verified this by printing with a 3-layer skirt), but the warping usually starts around the 8th layer. I suspect it could be related to the infill being added, but I’m unsure how to troubleshoot this. FWIW I’ve also noticed slight warping with the same design (with smaller dimensions) without the 45-degree chamfer (see photo) which was also printed with a 5mm brim.
I’m new to 3D printing and eager to learn. Any suggestions on what I might be missing or other techniques to try would be greatly appreciated!
i am also getting the same problem only had the printer 1 month, some prints come out perfect, but i do seem to have more problems with matt white,
have ordered a bambu glue stick, tried with a brim, made no difference, but did notice if i move the part in the slicer to a different place on the bed it worked, i also wipe the bed with isopropyl
Try watching while it prints the first few layers - i noticed this was happening with some of my items with corners because the filament was pulling the corner as it extruded in the other direction. Usually I can prevent it with a brim, or re-orienting the object so it isn’t changing direction right at that corner (use the preview in Bambu studio to see the bottom layer line directions and play with the settings)
The only “foolproof” fix I found was to use supports + a brim. Having said this, one thing that improved the result dramatically (however I have only tested this with Polytera PLA so far) was to move the seam to a different location — the slicer was placing the seam in the corner by default and I suspect that was causing the corner to lift as the nozzle quickly moves away from the corner, not giving the extruded filament enough time to dry. Naturally the result isn’t as visually pleasing with the seam not placed in the corner.
The lifting is caused by different layers being at different degrees of cooling. Anything with a large footprint on an A1 is susceptible to lifting at the corners. Like you, I have found that only the use of brims and supports helps with this on my A1. However I also have a P1S and the lifting is almost nonexistent. The aux fan causes the most problems and I regularly turn it off in my filament settings. Apparently it is in controlling the air, keeping it still and consistent around the print that matters most.
