3D printer manufacturer Prusa presents SwingArm as an open source alternative to the cable chain

With the SwingArm, Prusa Research has developed a new solution for cable routing on 3D printers. Instead of a classic cable chain, the company relies on a short, movable metal arm that guides the cables efficiently and at the same time enables easier maintenance.

Cable chains are often used to guide cables and filament hoses to the extruder in an orderly fashion. A disadvantage of this solution is the limited space inside, which makes it difficult to replace or maintain cables. To solve this problem, Prusa developed the SwingArm – a compact, swiveling metal bracket that guides the textile cable bundle.

The design has been optimized to minimize cable movement and avoid unnecessary strain. Another advantage is easier maintenance. While a classic cable chain is often time-consuming to open, the SwingArm can be easily detached with Velcro fasteners to replace or adjust cables.

The new solution not only saves space, but also reduces mechanical resistance. As the SwingArm is produced locally, Prusa can design the production independently of suppliers.

Prusa is making the design available as an open source project. The construction plans and documentation are publicly available and can be used for your own projects or developed further.