1w ago

Print refusing to stay flat in corners

I’m hoping you guys can help me figure this out. I have an ender 3 pro, running on marlin firmware. Every time I try to print something one of the corners will lift up like that and ruin the entire print. I installed a crtouch to help with leveling, installed upgraded metal bed wheels to help it not fall out of level. Even tried a glass bed with glue and it still does the same thing. I used a filament dryer and have a heat enclosure. I’m starting to run out of ideas on how to fix this. Any suggestions? The pic is how it starts and that was just a brim since I used to always use a raft and thought I should try that instead.

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Given all you've tried I can only conjecture that this may be a print temperature issue, especially since you already tried adhesive. What material are you printing, and at what temperatures for nozzle and bed?
You may also find that your printer's sensors are not reporting temperature accurately. Mine sure isn't and never has, at least on the bed, and it consistently reads about 5 degrees high versus reality if you poke the surface with an external temperature probe. This isn't a big deal only so long as you know to compensate for it. The thermal conductivity of whatever your print bed material is may also force you to compensate, i.e. a glass plate will not perform the same as a steel one and may require a boost of a few degrees and/or allowing it to cook longer during the preheating phase before you start your print.
I print on a sheet of cheap Kapton tape with a later of even cheaper hairspray on it (Aqua Net, if you must know), "65" °C bed temp for PLA (60 in reality) with a first layer temp of 215 for regular PLA, and 210 for "rapid" PLA blends. My sharp corners stay put.
- I’m using pla, I didn’t think about the temps being wrong though. I usually heat it to 200C and 65C respectively. I’ll have to get an external thermometer to check that out

47 comments