Hi, I’d like to ask for some advice. I printed a large object for the first time — it covered the entire H2D print bed but was printed using a single nozzle size. I noticed that during printing, the edge of the build plate lifted a few millimeters into the air. It doesn’t bother me too much right now, but is there a way to prevent this from happening? I was printing with Bambu HF PETG.
Avoid drafts, print with a closed build chamber, less infill also helps, bed leveling before printing large objects and filament calibration is recommended.
If nothing helps, increase the temperature of the build plate and/or use adhesive.
This happens due to overcooling. What I do on large prints is turn off the chamber fan so the intake closes and no cold air gets sucked in. I also turn down the max fan speed to 30% for PETG in filament profile. Also a good idea to swap to infill to something without straight lines as those tend to warp more, gyroid works well. On large PLA prints you want to turn off the AUX fan as well.
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In addition and if all else fails a reduction in speed and/or lowering the layer height are effective anti-warping measures. They do increase print times though.
Aux fan i use for filtration that can be activ ? H2D Aux Filter XL by KYZ Design MakerWorld: Download Free 3D Models
I recently switched from an MK3S+ to an H2D, so dealing with this issue is something new for me.
So basically, the nozzle cools the part during printing, causing it to contract and lift up, and as a result, the magnets can’t keep the build plate level — am I understanding that correctly?
Would keeping the chamber temperature around 45 °C help with this?
By the way, I’m attaching a photo I took it on the kitchen counter because of the lighting.
https://drive.google.com/file/d/17JZ6CsALQ0_l4Zl331IT9BHgjDzkk0YC/view?usp=sharing, https://drive.google.com/file/d/1g7THQ-1HuWOrqPZvS-UAUEtkEhVsda99/view?usp=sharing
Yes thats correct. You want the internal temp stable and air not being blown at the item you are printing. AUX fan should be off for everything except very small PLA items that dont have enough time to cool down each layer with the (tool head) part cooling fan.
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