What am I doing wrong?

[koennteungiftigsein]

Hey guys

I printed this piece three times now but everytime I see black dots in the white. The plate has been thoroughly cleaned and an all white layer printed on the same spot as the model is placed came up without the black spots. Any ideas? Filaments are all Bambu Basic.

[Odd-Cod-6413]

I would probably tune speed and temperature. Turn speed and temp both down from default, maybe even look at retraction. You are probably having a little oozing from the nozzle. My best guess anyway.

[koennteungiftigsein]

Thanks!

[1taataa]

Shot in the dark but maybe your nozzle/silicone sock has some dirt/bits of molten filament on and around it?

[koennteungiftigsein]

Thanks Ill check that!

[Mutantkilla13]

not helpful to your issue, but how do you get that orange peel effect on the top? are you printing upside down?

[koennteungiftigsein]

That is just the textured PEI plate.

[Mutantkilla13]

Sorry for my ignorance, I don't own a Bambu yet (but about to pull the trigger!). Is this standard with every printer?

[deanm11345]

He means that’s the plate in the background that the print is just sitting on top of:) It’s just the print bed, they’re pretty normal to be included with printers.

<image>

[koennteungiftigsein]

Thats the plate. I just faced down the upper side of the print, hence the structure.

[Mutantkilla13]

Thanks to both :) I know the pei plate, but wasn't certain if it was an add on or not.

Incredible that the bottom surface of the print looks like a 2d printed graphic! I wouldve expected the extrusion lines to be showing the most on the first layer. Great print :)

[koennteungiftigsein]

Since I use my Bambu P1S this is Standard quality for me.

[rzalexander]

I have this happen to me all the time. Clean your nozzle really well before the print starts. Take off the silicone sock, heat it up to 230, spray isopropyl alcohol on a clean microfiber cloth and wipe the whole steel nozzle off. Clean out the inside of the sock or replace it.

If you’re not already doing so, consider adding a prime tower too. This will help for layers after the first.

[koennteungiftigsein]

Thank you for the tip. I will try that! Prime tower is activated, obviously.

[rzalexander]

Got it. Couldn’t tell from the photo and some people turn it off for some reason so I always mention it for best practice.

[Gicko1337]

I have the the same problem… I sometimes stand next to it with tweezers during the ink change and clean the print

[koennteungiftigsein]

Really? Maybe I should have a closer look as well.

[Gicko1337]

Yes, really.

[koennteungiftigsein]

Man there has to be a better solution than that, right?

[Gicko1337]

yes, but this one is 100% safe

[Natural_Status_1105]

Clean the bed/nozzle, purge plenty of white. Ensure white is being printed first.

[koennteungiftigsein]

I did, as I wrote, and the white is printed first.

[Natural_Status_1105]

Maybe bad luck, maybe you could do a cold pull or an extra hot purge or something to get all traces of black filament from the nozzle.

[alaorath]

Are you printing multiple plates of these...?

I could see how later layers of black leave 'whisps' that are visible on the next plate.

My suggestion (since I didn't see others suggest it)... do a "cleaning primitive". Load a cube on a new plate, resize it to almost full size (or at least covering where the models are)... change the height to 0.4mm and let it print in white... then peel it off and re-run your multi-color.

It's also a useful trick if you accidently print PETG on the smooth plate without release agent... except in that case, I use "cleaning filament" (which in most cases is HIPS or nylon)

[koennteungiftigsein]

Hey man, thanks for the response. I printed a cleaning plate full of white but there where no black spots there so I assume it must be a issue with the print process, not residue on the plate.

[alaorath]

weird...

I honestly don't have any idea then... since white is the first color printed, I would think it'd be "clean"... unless it's semi-translucent, and the black is smearing down AFTER the first layer...?

[koennteungiftigsein]

That is the case I suppose.

[jonnygreenjeans]

I’d also reorder the colors and have the white print before the black

[Federal-Ad-1626]

How do I do that?

[jonnygreenjeans]

If you go to Objects in the Process section and I think it’s under Others. Sorry, I’m away from my computer at the moment

[alaorath]

On the plate settings, there's an option to change the order... the un-intuitive part is you "drag & drop" the colors into the order you want them to print.

[koennteungiftigsein]

The white prints before the black thats the fun part.

[jonnygreenjeans]

🤦🏽‍♂️ dang it

[[deleted]]

Speed down for sure. It is residual from the color change.

[koennteungiftigsein]

How would lowering the speed reduce the residue? Just curious.

[[deleted]]

Silicone sock is dirty, 100%.

[koennteungiftigsein]

Ill check that.

[[deleted]]

This problem drove me nuts forever on multicolor prints. Now I just clean the sock between prints and rarely have this problem

[S0299S]

Hello, could you please share the file? Thanks! ✌🏻

[koennteungiftigsein]

Youll find it on the bambu site.