Bulging lines on all prints

[abstract spear]

I just got a P2S to print cosplay armor and helmets. I am seeing bulging lines that I can't get rid of. I have of course ran all the auto calibration on the printer, firmware is up to date, filament dried in the AMS. Using .12 mm layer height with the build in profile in Bambu Studio. I even tried tightening all the belts. Also tried enabling precise walls, Arachne walls. I really need help. Wall order is inner/outer. Also tried putting printer on the floor.

[carmine flare]

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[devout flare]

One on the benchy is normal thats the hull line.

The rest... id check belttension for the z axis and relube the lead screws

@abstract spear

[abstract spear]

I already tightened the belts as I said. Why would I need to relube when it's brand new?

[devout flare]

Brand new doesnt mean flawless

And inconsistent layers are usally due z issues

Or extremely weird speed changes

[abstract spear]

I'm gonna try changing speeds and I'll grease it up

[abstract spear]

Changing speeds did not fix it

maybe it has to do with layert time

[frosty sentinel]

It kinda looks like overextrusion...especially since its not at consistent places between the two prints.
Have you run the manual flow rate calibration? (Not the automatic flow dynamics ) IIRC the P2S has to do the rate calibration manually

[devout flare]

Yeah looks about right what speed changes / layer time do. You can brute force it by changing the min time

https://forum.bambulab.com/t/banding-caused-by-differences-in-layer-time/22480/3 and the layer time with cooling (orca has the same setting)

[abstract spear]

The issue only happens when the support interface is a different filament. Increasing minimum later time does not resolve. Only workaround I can think of for now is to print support interface in the same filament

[devout flare]

Hmmm

[abstract spear]

Increase support interface print speed perhaps?

But I want my supports to be clean mm

[devout flare]

What do you use as support material?

[abstract spear]

Bambu PETG hf

[devout flare]

Did you happen to observe the nozzle temp after a change?

Since petg needs a higher temp to print and purge your nozzle might be too hot and overheat the pla for a while

[abstract spear]

Is there a different filament I can use perhaps for the support interface? That would be a similar temp?

I guess I can try Bambus support filament or pva

[devout flare]

You could try lowering the density of the interface layer

Which should help with support but limited contact points

[abstract spear]

Density of the interface layer when printing with petg as the support interface?

[devout flare]

Yes

Oh and check your wall generator

Maybe its on classic

[abstract spear]

it is on classic. I did try arachne as well as I originally said and it didnt help

[devout flare]

I often ask several times because often accidental changes happen

You can also try reducing the outer wall speed to 30mm/s and make a test piece 🙂

[abstract spear]

I-I tried taht

[devout flare]

Ah poopy but

Well then gcode edit is

In your printer config in orca should be a line M109 S260 ;set nozzle to lets try 230

By replacing the s260 with 230

[abstract spear]

if layer time still looks like this can that be ignored?

[devout flare]

It should hopefully allow you to ignore the layertime

[abstract spear]

oki ill try to test eventually

[devout flare]

Yeah maybe make a small test piece though so you dont waste too much filament

[abstract spear]

banding doesnt start til a little higher up

i guess i can cut it like this?

[devout flare]

You can try but check the preview first 🙂

Oh can you post a picture of the preview with layer type preview maybe we can change something there

[abstract spear]

not finding exactly that in the change filament code

[devout flare]

Ah damn

Hmm

You could try chanig the petgs max temp to 230

[abstract spear]

here is this