How do I print this? (Printing help) - Prusa3D Forum

Core One L - Problems with Supports falling over.

3d0zer — Sun, 07 Jun 2026 15:45:48 +0000

Hello,

I got a problem I cannot solve so far. My printer keeps throwing organic supports over on the same corner.
Have done the print now for the fifth time.
Mostly it happens at 3/4 of the print where the organic supports are moving closer to each other.

Have tried organic and snug supports.
Printer: Core One L
Model: https://www.printables.com/model/1732058-prusa-core-one-l-advanced-filtration-v2
Filament: PETG Professional LAB
Settings: See Pictures.

Have tried nozzle temps from 235 to 255
Fast and much slower speeds.
Many settings.
Washed my plate, degreased it.
Tried Bed temps 70 to 85 celcius
Increased Z Lift.
Chose for organic because of the clean sides I need, the Snug supports tend to stick to the sides.

Did also calibration of the bed and print head.

Hope you people can help me with some ideas / solutions

Earlier print #1

And my last print

Last Print

Last print

How to print ASA safe in a not so good ventilated basement?

simmania — Fri, 06 Feb 2026 11:01:34 +0000

Hi,
I ordered a Prusa Core One L. I want to print large ASA objects. I therefore those the Core One L.
I need to place the printer in the basement. This space is not very good ventilated. There is one 120 mm opening to the outside world.
I want to print safe and take care of the toxic fumes. So I ordered the Core One L with the extra filter and fan.
But I do not think that is enough.

So I was thinking: what about connecting the output of that filter with a hose to this opening to the outside world so that all fumes are blown outside the basement?
Problem with that is that I will blow hot air to the outside world. Somewhere cold air will be sucked in. So the basement will cool down and I think the printer chamber temperature will drop too.

How to prevent this? I have a heat exchanger laying around. Could that help? Then I would need some input to the printer chamber to be able to blow the preheated air into the printer. But that will still be a relative low temperature. So you will get all kind of cold air flow inside the printer chamber. Not good.

Putting the whole printer inside a second chamber that is connected to the heat exchanger may be an option? But placing the whole printer inside a chamber that is significant warmer than standard environment temperatures may be not good for the printer. The electronics (and especially the power supply) is not designed for that. Resulting an fire danger.

So what should I do? Any ideas?

Chamber temperature for ASA high enough?

simmania — Thu, 05 Feb 2026 15:27:02 +0000

Hi,
I ordered a Prusa Core One L printer. I'm waiting for the delivery. But now I have my doubts because I want to do a lot of ASA printing.
ASA needs a high chamber temperature like 70 degrees. But the Core One L only gets to 60 degrees.
Furthermore I ordered the filter kit. I'm afraid this extra filter with fan will make the maximum chamber temperature lower then 60 degrees.
In that case I will regret my choice for the Prusa Core One L.
Does anybody has some experience with this? And if this is a problem for ASA, is there a solution or work around?

Print rim

Grumpychef — Mon, 02 Feb 2026 19:23:27 +0000

Hello all, I want to make an office door sign, I can print the sign with text, but how would I add a thin line around the edges of the sign?

Thank you

Accuracy of the Core One L

maxluzi — Sun, 18 Jan 2026 19:44:56 +0000

Hello, everyone. I have another question.

How accurate should the Prusa Core One L be? I printed a cali -flower square with 250+250 mm, which is 249.7 mm to 249.8 mm. Also, it's not perfectly at 90°.
I have a diagonal difference of about 2 mm... I bought this machine instead of a Bambu because I wanted maximum accuracy. Have I been wrong?

I mean, I love this machine. Am I expecting too much, or is this something I can tune?

Greetings

Printing PA11-CF with Core One

Dcoudreuse — Sat, 17 Jan 2026 21:54:34 +0000

Hi,

Sorry for the newbie question. Have a Core One and quite new in 3D printing. Printing PLA and PETG with HF Nozzle, standard, 0.4, all perfect no problem.

Then I wanted to use some PA11-CF for small parts. Using Prusa Obxsidian 0.4, and just the standard print settings provided in Prusaslider. No modification.

Works sort of OK but lot of strong stringing, especially in empty but narrow areas, and some "strings" that pop out of plain surfaces. I have not played with retraction or anything (I thought that would be adjusted to the filament but it seems to be the same settings whatever filament I select). I just selected the filament in the list and went with that. This was the very first print from a PA11 CF stock that I just open 10 min before. Was it necessary to dry it nevertheless, even if it is just out of the film and dessicant bag ? Do I need a Drybox ? If someone car share print settings for this material, including retraction and Co. that would be awesone...

Thanks !

help me with printer setting

AWL_Prusa — Thu, 15 Jan 2026 14:08:05 +0000

Hello,
I am printing on my core one L this big part from PETG. and i can not find right parameter for printing. the corners are alway bended upwards. from 1 to 2 mm. i am printing on PEI satin sheet. I already tried diferend nozzle temperatures such 240 and 255 degre, also i tried enclosure heanting on 50 degree with fan OFF. but still bending.
I tried also Brim 8 mm wide. without succes.
Can anybody have some proposal, how to print this part?

2 perimeters, 15 % fill.
Thank you