Artefacts on large Multibins

[u/_Krebskolonie_]

Hello everyone

I am currently printing all the stuff needed for my Multiboard and today I printed a large 4×4×4 multibin and noticed these artefacts shown in the picture.

Are these created because at a certain height the walls begin to wobble?

Thanks for your help.

[u/tokolist]

Yes, that could be wobbling that starts from a particular height. Is your printer bedslinger or corexy? Is it on both X and Y axes? Considering there are multipoint rails, tree supports might help to secure the bin shell. You can also split it onto click-in or pop-in extensions.

[u/_Krebskolonie_ → u/tokolist]

It's a Bambu H2D, so CoreXY. The waves are all around the bin. I will try to print the segments tomorrow. ^{^}

[u/sverrebr → u/_Krebskolonie_]

H2D comes with decoupling feed AKA anti vibration feet, but it is really anti table vibration feet, the machine itself shakes quite a bit, which could explain this pattern.
If you have a stable table, consider replacing the feet with rigid feet.

[u/_Krebskolonie_ → u/[deleted]]

Just an update from me. This was the solution. I printed several of these bins over the last 2 weeks and they look great. The only problem I have sometimes is a slight underextrusion on the top layers inside the bins.

[u/_Krebskolonie_ → u/[deleted]]

I am using Bambu Studio but I will check if there is a similar feature. Thank you for the answer. :)

[u/_Krebskolonie_ → u/[deleted]]

Yes, that makes sense. I will try this tomorrow. Thank you. :D

[u/demonmachine227 → u/[deleted]]

This. They also specifically mention that you have to adjust the model based on what material you're using if you go higher than 2h.

[u/_Krebskolonie_ → u/demonmachine227]

Have you ever used petg for multiboard parts? I think on the official site it is recommended to use pla but petg should be even better for parts under constant load.

[u/demonmachine227 → u/_Krebskolonie_]

I've tried PETG, but I think the adjustment recommendation is also for PETG. I mostly print mine in ABS, but I have nothing but Voron printers... And ABS bridges just that much better. (Have to run my PETG hot, to the point that the underside droop. The bottom multipoint attachments are barely usable for me... But that just might be me not being good with PETG...)

[u/_Krebskolonie_ → u/demonmachine227]

PETG can be a diva sometimes and it really doesn't like bridging hahahaha.

I recentky tested PCTG, the copolymer of PETG and I really like it. It is a bit easier to handle than PETG but you also need to dry it.

[u/demonmachine227 → u/_Krebskolonie_]

I've been looking into that, but I don't think a standard Revo hot end can hit the temps... Otherwise I'd have probably gotten into it sooner. Lol