Print issue. Brim is good. Tried 2 different filament

[magickarle]

Detailed description of the problem: I’m having strange issue. The quality is great on brim. But on the part, it’s horrible. I did the max vol speed calibration and quality is superb untill 30. So ive set it at 25.
Printer was left for a while and was fine before. Idled for maybe 8 months.
Printer model used: Bambu p1p
Orca settings used: default PCTG except first layer is 0.25 and max vol at 25.
Bed at 100 (had bad adherence) print temp 265
Type of filament used: PCTG (out of box, no humidity (un detectable humidity level).
There was a firmware upgrade (not sure if this could trigger this?)

Like I said: max vol printing was A1. What could do this?!

2l_Carton_Caddy_Honey_Bee_01.3mf (283.0 KB)

[simon14]

Would you share your 3mf project file? It could shine some light there.

[MalcTheOracle]

@magickarle

(out of box, no humidity (un detectable humidity level).

I know what you are saying, but, from the pictures, that looks like moisture.

Have you tried drying it?

[magickarle]

Been in the box for more the 48 hours. Registers under 5%.

If it would have been the filament, the brim would be as bad as the part wouldn’t it be?

[magickarle]

Sure. it’s done. I’ve printed it couple of times before. No issues.

[MalcTheOracle]

@magickarle

Been in the box for more the 48 hours. Registers under 5%.

Do you mean a dryer or the packaging box?

@magickarle

If it would have been the filament, the brim would be as bad as the part wouldn’t it be?

Commonsense says yes, but, things do not always work out that way.

I am guessing as it looks very weird.

I have not used PCTG before, at first, I thought you mistyped PETG, but a Google search told me there is such a filament.

[magickarle]

Drying box yes.

The max vol calibration was clean and slick. Nothing like the part.

[StreetSports]

Almost reminds me of a single or dual wall print with fuzzy skin enabled.

Edit, nevermind. Looks like a clog on layer 2. Layer one actually looks good. Gotta zoom in to see what im talking about

[simon14]

@magickarle

2l_Carton_Caddy_Honey_Bee_01.3mf (283.0 KB)

I am interesting on how your Bambu Studio slice it, as well as print profile, printer profile, filament profile.

When I load your file, it load my default profile.

Because look at your picture, it’s like your didn’t have PA enabled and too much overextrusion at the 2nd layer. I don’t know for sure just with a picture. Hence I asked for 3mf project that has complete your print profiles and all.

[magickarle]

First layer was ok.
Then on subsequent, seem there are buldges forming destroying the print.

[magickarle]

i cant find a way to post filament or printer profile in 3mf. I find them in json or orca_printer extension.

[simon14]

@magickarle

20241215_1108181638×4000 1.11 MB

This looks very much like partial nozzle clog.

Try increase temperature by 5-10°C or even 20°C. My thinking is, first layer it prints slow, second layer onward it prints with double speed. The nozzle becomes cold fast with cold plastic coming through.

Btw, quick google search shows this

So, slow down the print speed would help.
Like, bring everything down under 100mm/s

[magickarle]

wouldn’t a partial nozzle clog not print at 30 max vol speed (i was able to print up to 30 max vol speed on the calibration)

[MalcTheOracle]

Weird thought, almost certainly wrong.

Can you confirm your nozzle is set as stainless steel or hardened steel on the printer as you have on the slicer.

I had a texture issue with TPU 95A a while ago with a hardened steel nozzle, upper layer rather than bottom.

As I say, unlikely, but, throwing ideas at the wall.

[magickarle]

Set as Stainless yes.
I’m starting to think the printer has some strange issue after firmware update (I’ve had 2 fw updates and an orca update. I didn’t try printing in between).

[magickarle]

I’ll try to remove the PTFE tube (maybe worn) and do a direct filament print test.
Then I’ll do a complete cleanup of the extruder and see if it helps.

Then if it fails I’ll try a complete factory default of printer.
I’ll keep you posted

[magickarle]

Ok it’s fixed.
PTFE tube helped a bit.
Combined with a clean-up of the extruder fixed it.

So i guess it was a mix of both. What i think was happening: there was a “rebound” on the filament. PTFE was a bit pinched and extruder was dirty so filament was slipping somehow …

There still some small anomalies looking closer… I’ll tweek the speed and see if it helps.