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Update on the "crushed letters" issue (lemmy.sdf.org)
submitted 1 month ago* (last edited 1 month ago) by ExtremeDullard@lemmy.sdf.org to c/3dprinting@lemmy.world
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See original problem here

So I played with all kinds of settings in PrusaSlicer. Nothing changed anything.

The only things that did improve the outcome some was:

  • Forcing the letters to be printed first: then the letters are smooshed and bleed into the background instead of the other way round, which arguably looks better / more legible. Nothing to write home about though.

  • Dropping the first layer's height to 0.1mm (the other layers are 0.2mm high): that improves the letters a bit.

  • Dropping the first layer's height to 0.05mm: because the first layer is so thin, it becomes kind of translucent and the wider white letter beneath it sort of show through. The net result is that it drops a kind of gaussian blur onto the lettering, which actually improves them - especially at a distance.

Other than that, there's just nothing for it. And half of the suggestions I got concern other slicers, and I couldn't find them or equivalents in PrusaSlicer. Oh well...

I guess that's as good as it's gonna get.

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[-] greybeard@feddit.online 14 points 1 month ago

Just a thought: Try making the first layer of letters empty so the letter fill is actually a layer 2 bridge.

A trick I have done is printing the first layer solid in a transparent filament, then layer 2 as 2 color.

[-] iamanurd@midwest.social 11 points 1 month ago

Super cool to see an update on this. Thanks for posting, since it will help the community!!

[-] ladicius@lemmy.world 3 points 1 month ago

Besides printing issues: If I were a user of these adapters I'd be fine with what you got - it's readable, and I wouldn't expect high definition on this.

[-] ExtremeDullard@lemmy.sdf.org 1 points 1 month ago

Thanks!

Yes, they're perfectly serviceable. I'd just like them to look more "professional" I guess, for my personal pride 🙂

[-] fhein@lemmy.world 2 points 1 month ago

Did you calibrate flow rate, retraction and z offset? Teaching Tech has a pretty thorough guide for all things calibration.

[-] StarvingMartist@sh.itjust.works 2 points 1 month ago

Fuck me retraction has done me dirty so many times, I'm convinced it's just not worth it unless you've got a direct drive extruder

[-] fhein@lemmy.world 1 points 1 month ago

You mean you have turned it off completely? I used it with the stock E3v2 extruder and BMG in Bowden mode, and later with BMG in direct drive mode, without any retraction related problems and I think it's the same for the majority of 3d printer owners. Perhaps your printer had some other issue, which only showed up in combination with retraction?

[-] StarvingMartist@sh.itjust.works 1 points 1 month ago

Yes I have, and it's not even worth troubleshooting tbh, I'm not having any of the issues that having it on would fix

[-] CmdrShepard49@sh.itjust.works 2 points 1 month ago* (last edited 1 month ago)

This is a resolution issue, so think about X & Y settings rather than Z settings like layer height. You need to reduce the line width and/or use a smaller nozzle like 0.2mm. You might also have a bit too much squish on your first layer which you could measure by printing a line and measuring it with calipers and comparing the slicer value to the actual value to see if there's any difference.

I'm not familiar with PrusaSlicer but Bambu Studio has a wall generating setting called "Arachne" which does a better job of generating the small features/walls you need for text even with a 0.4mm nozzle. You might see if there's a comparable setting for Prusa.

[-] ExtremeDullard@lemmy.sdf.org 1 points 1 month ago

You're correct. A 0.2mm nozzle would certainly improve things. But it would also make printing those tabs unbearably long.

I wish my company had bought a 5-head Prusa XL: then I could have loaded black PLA and white PLA in two heads with 0.2mm nozzles, and a separate feed of black PLA in a third head with a 0.4mm nozzle for the rest of the parts that don't need to look nice. But... ours only has two heads and it's 0.4mm on both, because all the other parts we prints just don't need finer details.

[-] Shayeta@feddit.org 1 points 1 month ago

A 0.2mm nozzle would certainly improve things. But it would also make printing those tabs unbearably long.

Longer than its been taking to solve this issue without it? Just bite the bullet and get the results you want.

[-] ironhydroxide@sh.itjust.works 1 points 1 month ago

Maybe play with the first layer line width.

[-] ExtremeDullard@lemmy.sdf.org 1 points 1 month ago

I did. No difference whatsoever.

[-] mvirts@lemmy.world 1 points 1 month ago

I was thinking you could inset the letter boundaries on the letters first setup, but it looks like you only get 2 walls out of the slicer. Maybe try setting it to not outline the walls at all in letter first mode?

[-] BigDanishGuy@sh.itjust.works 1 points 1 month ago

From the other post I remember you said that having the letters in the top layers didn't work for you, because that meant a lot of support material to remove.

From what I understand, your product consists of two parts. The large part with the letters and a counter part, which is just a flat piece.

So why not put the letters in the flat piece? That way you can print them either way up.

[-] ExtremeDullard@lemmy.sdf.org 1 points 1 month ago

So why not put the letters in the flat piece? That way you can print them either way up.

Good thinking!

In fact, that's what I did first: the markings were on the lids rather than on the shells.

The problem is, because the lids are dovetailed, they're narrower than the shells they dovetail into, so the width for the markings is reduced. meaning the letters need to be smaller, meaning they look even worse on the lids.

[-] surph_ninja@lemmy.world 1 points 1 month ago

I’m not sure if any of the tips will translate well to your project, but this is another project that worked with small lettering: https://youtu.be/e7K3BXWmipk

That being said, I printed this project, and the results were kinda ‘meh’ even after loads of manual cleanup. Probably one of the most tedious prints I’ve ever had to do.

[-] ExtremeDullard@lemmy.sdf.org 2 points 1 month ago

So the guy printed throwaway first layer that he filed off to uncover nice- (or at least nicer-)printed letters underneath? Interesting concept. Too much time to spend on my little tabs though, since I make them by the bedloads for our many cables, but I like the idea.

[-] surph_ninja@lemmy.world 1 points 1 month ago

Yeah, just building a single unit of these was mind numbing. If I had the money, I would’ve just bought premade buttons. I’ll never make one again.

this post was submitted on 09 Jun 2025
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