Prusa3D Forum - Recent Topics

Scheduled: Prusa Community Live Ep-001

Ruebarb — Thu, 04 Jun 2026 15:23:18 +0000

Doing Prusa's job since they treat the forum like thier unwanted child.

Today in a few hours.

https://www.reddit.com/r/prusa3d/comments/1twpxag/scheduled_prusa_community_live_ep001/

https://www.youtube.com/watch?v=Kb55xTXYGG0

Crash detection not working

Mike Daneman — Thu, 04 Jun 2026 14:44:40 +0000

I recently had a crash happen where the tool ran into the print. However, the CoreOne didn’t detect it as a crash and happily continued to print at a large offset. One perhaps key aspect is that the crash didn’t happen on the nozzle, but at the part cooling fan shroud (the cause of the crash was some incorrect custom g-code).
My previous MK3 would detect crashes by looking at current spikes in the stepper motor drivers, so would have detected a crash like this. Is it correct that the CoreOne only detects crashes using the nozzle load cell (meaning it won’t detect a crash not involving the nozzle) or should it still pay attention the stepper motor drivers as well?

Thanks

Which filament for this print

Phil — Thu, 04 Jun 2026 12:53:56 +0000

I printed this helmet holder in ASA-CF, 0.4mm hardened nozzle, 20% gyroid infill. I had a full spool of ASA-CF on hand was a major reason I picked this filament. Was this filament a good choice for this helmet bracket? If not, which filament would have been a better choice?

https://www.printables.com/model/873800-best-helmet-holder-helmhalter

Which filament for this print

Phil — Thu, 04 Jun 2026 12:53:56 +0000

https://www.printables.com/model/873800-best-helmet-holder-helmhalter

Getting error when using command line

John — Thu, 04 Jun 2026 09:58:10 +0000

I have scripted the generation of gcode from some openscad models, but while the script works, every time it invokes the slicer, it raises an error:

   flatten_configbundle_hierarchy: The preset Prusament Resin Model Transparent Clear @0.1 SL1S inherits an unknown preset "*legacy_slow*"

The script continues, and it generates my gcode, so it's a non-blocker, but I'm wondering if anyone knows how to fix this? I didn't create any custom filaments called `Prusament Resin Model Transparent Clear @0.1 SL1S`, so I'm not sure where it's coming from.

Contact Moderation without DM permission

Matt — Thu, 04 Jun 2026 09:47:31 +0000

Hi everyone,

does anyone know what the correct way is to contact a moderator for a sub forum (Prusa Core One+ ) as a relatively new user who does not have permissions to send direct messages yet?

Kind regards
Matt

New Blog post. "Fake" Studio lighting on your 3D prints.

Same Old Shane — Thu, 04 Jun 2026 04:46:23 +0000

Greetings all;

There is a new post on our blog that introduces Prusa’s new free ColorMix Shading web app, which lets users add realistic, light-based color shading to 3D models directly in the browser. Inspired by zenithal priming, it explains how the app uses virtual lights and filament mixing to create more depth in prints, including a walkthrough

Check it out and share your comments in the post

https://blog.prusa3d.com/introducing-the-colormix-shading-app-make-your-models-pop-with-realistic-lighting_136716/

Printer keeps destroying print

Emiel De Beer — Wed, 03 Jun 2026 18:50:45 +0000

Hello!

I've had my Core One L for a few weeks now, but I'm running into trouble when I try to print large objects. At first I thought it was bed adhesion, but as you can see in the picture, the print broke apart while the first layer is still stuck to the bed. I use Polymaker PLA and the standard (non–high-flow) nozzle.

I tried increasing "First layer expansion" and "Top interface layers," turned down the support speed, and set the lift height to 0.4 mm.

I use the latest PrusaSlicer. Does anyone have any idea what could cause this? I've tried about 10 times with different settings but keep running into the same problem. I'm getting a bit desperate. I've tried so much and wasted a lot of PLA.

This is the model i tried printing but got similar issue's on different helmets.

https://www.printables.com/model/196134-the-batman-2021-inspired-helmet

Prusament PLA partial filament jams, despite correct temperatures.

Matt — Wed, 03 Jun 2026 17:18:32 +0000

Hi everyone,

3D printing newbie here I'm just experimenting with my first 3D printer (Prusa Core One+). So far I've successfully printed two models from printables with the printer, however I'm running into issues with my first own design. For some reason the print starts nicely and after some time the filament seems to randomly jam, i.e. the extruder starts knocking and fails to continue to print properly. I find this weird because the model is mostly a uniformly shaped cylinder. The picture below shows two attempts. The first one was created using the Prusament PLA preset from the PrusaSlicer which was set to 230°C for the first layer and 225°C for the rest. After looking around in the troubleshooting section for the Core One, I found that one cause for the jamming could be the nozzle temperature creeping up to high during print. According to the label on the JetBlack PLA Prusament the optimum print temperature is between 205°C and 225°C. So I lowered the setting to 225°C for the first layer and 215°C for the rest. However the 2nd result with the lower temperature (left on the picture) failed even earlier.

I'm wondering if there is an issue with the model, maybe a rookie mistake? However if that was the case I'd expect to see the print to fail much earlier, the model is mostly a uniformly shaped, hollow cylinder. So at the point the printer fails it is basically doing the same thing it has done for many minutes flawlessly.

Both the printer (factory assembled) and filament are brand new from Prusa so moisture won't be an issue.
The lower part that is printed properly looks good and is structurally stable.
I created the model with Blender and exported an STL file
I imported the STL file and sliced it with Prusa Slicer using the PLA presets mentioned above.
Does anyone have an idea what could cause the issue shown on the picture? For reference I also added the G-Code I sent to the printer (drill_bit_holder_round_120x17_5mm_0.4n_0.15mm_PLA_COREONE_1h43m.bgcode)