Prusa3D Forum - Recent Topics

Prusa MK3S Enclosure with Klipper, Air-Quality Sensors, and Nozzle Clogging Detection

jungoari — Thu, 07 May 2026 17:18:11 +0000

Hello everyone,

I’d like to share my ongoing project: Prusa Enclosure V1.0.

This project began as a custom enclosure and control-system modification for a Prusa MK3S, but it evolved into an experimental monitoring platform for sensor-based nozzle clogging detection.

Project overview:

Base printer: Prusa MK3S
Control direction: Klipper + Raspberry Pi
Controller conversion: SKR Mini E3 V3.0
Enclosure: custom two-level structure with a lower Printing Room and upper Filament Room
Filtration: closed-loop HEPA + activated carbon
Sensors:
PMS7003 for PM1.0 / PM2.5 / PM10
SGP30 for TVOC / eCO2
DHT22 for temperature and humidity
Data collection: 1 Hz synchronized sensor logging
Research direction: multivariate time-series based nozzle clogging detection

The motivation was that nozzle clogging can happen while the printer motion still looks normal. Camera-based monitoring is helpful, but it can be affected by lighting, occlusion, camera angle, and enclosure conditions. I wanted to explore whether air-quality and environmental signals could provide an earlier warning.

In the paper-backed experiment, the detector achieved:

Accuracy: 0.951085
Precision: 0.946218
Recall: 0.999913
F1-score: 0.972325
ROC AUC: 0.975934
Early warning lead time: 472 seconds

The result should be interpreted carefully: the clogging labels are based on a TVOC_diff persistence rule, and some normal samples were classified as clogging. So I see this as a conservative early-warning prototype rather than a complete production-ready detector.

GitHub repository:
https://github.com/Jungoari/Prusa-Enclosure

I would appreciate any feedback on the enclosure design, filtration structure, sensor placement, Klipper configuration direction, or failure detection approach.

MK4 Firmware

Jim Hart — Thu, 07 May 2026 15:51:24 +0000

I have just come back to my MK4 after a long spell away. The firmware is 3.12.2. I updated the Slicer to the latest version which seems to be 2.9.4. Now the code produced from the Slicer is ' .bgcode' which my MK4 does not open. Looking at old SD cards the code is all''.gcode'

What do I have to do now.

I did look at how to update the printer Firmware but it is talking about a USB which I do not have - just a SD card slot. As effectively a beginner again I am lost Some help would be much appreciated

Jim Hart

Hotend Lüfter Fehler

MATTERRA — Thu, 07 May 2026 14:14:57 +0000

Hi!
Ich habe eine Core One L und er hat vor zwei Tagen während des druckens aufgehört. Fehlermeldung: Hotend Lüfter dreht nicht.
Das ist aber nicht der Fall, er dreht. Keine Hindernisse, kein Dreck, keine Beschädigung des Kabels. Bei "Kalibrierung und Tests" kommt auch ein X, also fehlerhaft. Er dreht aber, erst sehr schnell, nach 2 Sekunden langsamer. Neueste Firmware ist drauf. Neu gestartet, Lüfter ausgebaut, eingebaut und trotzdem Fehlermeldung!

Hat wer eine Ahnung?

INDX with cereal dryboxes

jgorniak — Thu, 07 May 2026 13:47:34 +0000

I keep all of my filament in individual cereal box dryboxes and successfully use the MMU3 with them on my MK4S. Footprint concerns aside, is it feasible to arrange 4 boxes on each side of the Core One+ feeding an 8 tool INDX system? I'm primarily concerned about the route and angles of filament going from the dryboxes into the printer. Seems like a lot of PTFE tubing to traverse.