A precise view of the print nozzle can be crucial for troubleshooting in 3D printing. A new DIY project from Mellow Labs shows a cost-effective solution for this by converting a commercially available USB endoscope camera for close-range monitoring of the nozzle on a Prusa Mini. The implementation is based on just a few components, can be realized without special tools and is aimed at technically experienced makers.
Mellow Labs uses an inexpensive USB endoscope camera, which is normally used for pipe inspections. This is removed from its aluminum housing, modified and rewired. Mellow Labs replaces the factory LED lighting with LEDs from an old light bulb to achieve uniform and bright illumination at close range. A simple heat-shrink sleeve serves as heat protection.
The camera is attached to the print head using a self-designed, 3D-printed mount made of PETG. The camera arm can be parameterized and comes from a community design that was adapted to the geometry of the Prusa Mini. A special aspect of the design is the plug-in connection. The camera can be easily removed after the printing process by soldering it yourself. This keeps the printer easy to maintain.
Mellow Labs explains its development in the video:
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