Modular (Endless) Spool Holder

cults3d

The design hinges on a fundamental principle that each spool holder functions autonomously AND can be easily linked together in a sturdy framework. The "leg" (parallel_spool_holder-side.stl) is engineered to form a secure lock with the "axle" (parallel_spool_holder-top_XX.stl), enabling it to serve as a spacer -- maintaining consistent width based on spool size -- while also being extremely easy to replace. Round rails (parallel_spool_holder-rail.stl) connect the entire structure, rendering it highly stable due to their formation of a flat rectangular base with the "legs". Each rail is designed with 150 mm length and can be connected to a subsequent rail using a pin bolt (parallel_spool_holder-pin-distancer_v3.stl) to create an endless framework. Naturally, as current length may pose a limitation in confined spaces (boxes/containers), the rail can be easily shortened (by slicing it with negative Z) to accommodate the entire structure within those constraints. Three distinct lengths of "axles" are available, corresponding to inner (or spool) widths of 66, 72, and 80 mm, aimed at accommodating standard 750 g and 1 kg spools. The behavior of a spool on the holder exceeds expectations. The spool rolls effortlessly and without any jerking, thereby eliminating the counter pull of filament (which occurs during spool jerking roll). Witness it in practice: https://www.youtube.com/watch?v=ogbV4SyOalI Printing a holder for one spool requires (for 2 sides, 2 rails, and 1 top) approximately 40-45 meters, depending on type and infill, of course. All parts in photos are made from PETG, but I'm confident that PLA will prove to be an adequate material (with proper slicing settings).