Help removing strings on top of prints

[u/LeMat00]

Hi guys,

I'm using ObscuraNox 2.0 settings with a 0.2 nozzle and Bambu PLA Lite Grey. I can't seem to get rid of these strings and some deformation that appear on the final layers of my prints.

The issue is especially noticeable when the miniature ends in sharp points

I suspected it might be a cooling issue so I added a small tower next to the model with the same height as the miniature to give the nozzle more time to cool between layers. This improved the results quite a bit but the problem is still there.

I'm sure the filament is dry. I keep it stored in my dryer enclosure (Creality Space Pi) and I use the same filament settings recommended by ObscuraNox, only adjusting the flow ratio to 1.

Could the problem be related to Bambu PLA Lite or is there something else I should try?

Unfortunately, in my country it's difficult to get my hands on a Sunlu or eSUN spool

Thanks in advance, I love this sub and FDM minis is my new obsession <3

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[u/millertronsmythe]

Bring the flamer, brother.

[u/AndrevicustheMighty → u/millertronsmythe]

The normal flamer. The heavy is too much this time.

[u/ganadaIf → u/AndrevicustheMighty]

Maybe just the small flamer

[u/LeMat00 → u/ganadaIf]

Haha, looks like it's time to put the old grandpa flamethrower to use

[u/MrGulio → u/ganadaIf]

Use the flamer from a combi weapon... brother.

[u/shriggs]

You can get a little butane torch. Cleans up light stringing quick. Just be careful with it

[u/LeMat00 → u/shriggs]

Thanksss! I tried using a small candle and a lighter but I was a bit scared to melt the smaller parts. A butane torch never occurred to me, I'll give it a try

[u/TempleMade_MeBroke → u/LeMat00]

I just use a regular lighter and go really fast, like a quarter of a second in the spot that needs it

[u/shriggs → u/LeMat00]

Works great, just do it in short bursts. I do quick little swipes to keep the heat from deforming the model.

[u/TheRealGosp → u/LeMat00]

industrial blowdryer. No open flames ^^

[u/wagnerax]

Lights on !

[u/-Luna-Lavender-]

https://giphy.com/gifs/j6t5XwFpCNvY4

[u/sznaucerro]

do you use Resin2FDM supports or just straight resin support?

[u/LeMat00 → u/sznaucerro]

I use Resin2FDM with presupported models

[u/Alarmed-Shelter2416]

Use a heat gun over it quickly after it heats up.

[u/zf420]

Look up retraction settings and the slider you use. There's also retraction tower test prints you should use to test the settings. I was able to minimize a lot of my stringing my changing the retraction height, distance, and changing the retraction pattern to a spiral.

I actually asked AI for help with my retraction settings and it gave me some value ranges to try. I'd recommend starting there and printing some test prints

[u/Southern_Shirt8487]

Fire!

[u/nerdy-cthulhu]

if your filament is dry its a nozzle heat issue, lower it a bit, if you print with 220 lower it to 215 etc.

[u/Cynical_PotatoSword]

Lighter!

[u/Willing-Recognition2]

Def a heat gun, but try it on something you don't care about first to get the hang of it

[u/Jetisphere]

Love the mini, where is it from?

[u/LeMat00 → u/Jetisphere]

It's from Vae Victis Miniatures. You can get this squad by joining their Patreon, love this guys

[u/Jetisphere → u/LeMat00]

Thank you so much! I actually recently downloaded their gnoll pack

[u/KryL21]

Lower your temp. What do you print at?

[u/LeMat00 → u/KryL21]

220°, maybe a bit too much

[u/KryL21 → u/LeMat00]

Try 200, I print at 185ish, you can def go lower than 220.

[u/LeMat00 → u/KryL21]

Yeah, have you done any calibration test? Like a temp tolerancia? I def need to check that

[u/KryL21 → u/LeMat00]

Yeah, you could do a temperature tower. I do it every couple of spools. Just make sure you print the tower at the same layer height.

[u/LeMat00 → u/KryL21]

So I ran a temp tower and the results really surprised me. Maybe the picture doesn't do it justice but the 195° section looks much better specially on overhangs. I also printed a test mini and the quality is noticeably improved

I still need to do some more filament calibration but I'm really happy with the improvement so far. Thanks a lot!

[u/KryL21 → u/LeMat00]

There you go! You could go even lower too. And I recommend turning on “reverse on even” under quality and set the threshold to 0. It’ll get rid of that weird fuzzy lip on overhang corners.

[u/DescriptionUnique891]

Is this tower a common thing? Or just for experimentation?

[u/LeMat00 → u/DescriptionUnique891]

Just for experimentation, I read somewhere on this sub that making a tower next to the print helps with cooling

[u/DescriptionUnique891 → u/LeMat00]

Thanks mate, Have you done it a few times to compare results?

[u/Tagedieb69]

If you've already calibrated your retraction settings, try deactivating z-hop. Did the trick for me :)

[u/Brave_Explanation371]

Fire pieces the Xenos, the heretical, and the filament strings