Prusa patented a handheld multitool for 3D printing. It prints, melts, and smooths.
When a crack shows up on a print, a gap from poor layer adhesion, or an ugly support scar, you usually grab several different tools. Weld the crack with a plastic welder, fill the gap with a 3D pen or glue, then smooth everything with a file, sandpaper, or micro soldering iron. The application describes a tool that packs those three functions into a single handle. The filing notes that existing devices handle only one technique, yet real repairs often need a combination. Three attachments covered in the application: Fill material can be the same filament you printed with, so the repair matches in color and properties. How it’s supposed to work The device splits into two parts. The body holds the battery, controls, filament drive, and the connector for the attachment. Filament feeds from the body, not the head. The attachment carries the heater, temperature sensor, the actual tool, and the interface that lets the head talk to the body. The device detects what’s plugged in and sets temperature and behavior accordingly. A locking mechanism keeps the attachment from backing out on its own. The clever bit is the connector. It doesn’t just carry power and signals — it…
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