Over-Engineering An FDM Spool Holder From Prusa Mk4S Remains

June 5, 2026 by Maya Posch 2 Comments

Unlike resin printers where you generally just pour the fresh resin into the easily accessible vat, FDM printers need to squirrel away at least one spool and its requisite holder somewhere. For bed slingers this generally means a top-mounted spool holder, while for CoreXY enclosed printers they can appear on the sides, top or – inexplicably – on the back. While a side-mounted spool is often convenient, access to the side can still be blocked, in which case you do what [3D Maker Noob] did and over-engineer a fancy top-mounted spool holder.

The problem started after converting a Prusa Mk4S to a Core One using the conversion kit, which changes the position of the spool, forcing him to work around not having access to the right side of the machine where the default position is. After a first version using many of the left-over parts of the original Mk4S to create a fancy box-shaped spool holder, he proceeded to upgrade it as detailed in the video. All project files and instructions are available on Printables.

The result is a box you stack on top of the printer somewhat like a multi-spool box, just flatter and with a flippy lid on the front from which a rail slides out with the magnetically attached spool holder. A spool holder which you naturally can further customize to fit different spools. Even if over-engineered, you can’t deny that it would fit in confined spaces and looks pretty good while doing its job.

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Spool Roller Gets Touch Screen

April 24, 2026 by Al Williams 2 Comments

If you have a desktop 3D printer, you probably want something to hang filament spools on. [LVTRC] has a spool roller that fits the bill. It also incorporates a scale and a round touch screen. (Google Translate)

We’ve seen those round screens before, and now we wonder why we didn’t think of this. The GC9A01 display shows a progress ring and lets you save settings or calibrations to EEPROM. An Arduino Nano provides the brain, and the load cell connects to an HX711. The project is made to fit a specific printer, but it should be little trouble to adapt it to a different printer or to mount it in an external mount.

One of the calibration steps, of course, is to program the weight of an empty spool to subtract from the total weight. The device can store up to five specific profiles.

Not the biggest spool holder we’ve seen. We keep thinking that we don’t know why we want a circular screen, and then someone always drops in to show us another thing we didn’t think about.

3D Printer Spool Roller Is Built For Giant Spools Of Filament

January 27, 2023 by Zoe Skyforest 15 Comments

Most 3D printers come with a pretty basic filament holder — often little more than a bar to hang the spool on. [Ivan Miranda]’s 3D printers run bigger spools than most, though, so he had to craft an altogether more serious solution.

Unlike most of [Ivan]’s creations, the spool holder isn’t actually 3D printed. For this job, he turned to a laser cutter instead, cutting the parts out of 5 mm plywood. A handful of layers of wood bolt together to form the frame. The frame holds several bearings for the outer rims of the spool itself to ride on, allowing it to spin freely as the extruder tugs on the filament. Reducing the rolling resistance of the spool is key when working with such large, heavy spools, and reduces the chances of the filament not feeding properly.

It’s a tidy example of a tool built quickly and easily using a laser cutter. It pays to remember that while 3D printers are great, a laser cutter can often turn out parts in a short fraction of the time.

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Ingenious Filament Spool Holder Keeps Your 3D Printer Printing

December 29, 2014 by James Hobson 16 Comments

If you have a 3D printer, chances are, the company you bought it from skimped out on the design of their filament holder. It’s okay though, it’s not like having a toilet roll holder for your spool will result in failed prints… oh wait…

We don’t normally share projects like this because, gasp, it’s not really a hack, but this completely 3D printed filament spool holder by [Creative Tools] is actually quite amazing. It’s been designed to fit pretty much any kind of spool of filament you can imagine, as well as no spool at all. But what impresses us most is how the entire thing is 3D printed or makes use of 3D printer filament. No fasteners, no nothing.

Stuff like using rubber filament instead of grippy foot pads, and hard filament as the axles with 3D printed wheels for the quasi-thrust bearing used to support and rotate the spool.

All the parts are available over at Thingiverse.com — even if you don’t have a 3D printer, you might want to see the following video for some inspiring design tips on how to make such a clean and polished 3D printed assembly.

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Awww Shoot! My Spool Doesn’t Fit My Holder

April 17, 2014 by Rich Bremer 38 Comments

spoolholder-main

The great thing about standards is that there are so many to choose from. Filament spools certainly do not deviate far from this sarcastic saying. So what are we 3D Printer folks to do? Here are a couple completely different DIY options:

[Mark] made a spool holder that can accept 2 different width spools. This design uses skate bearings to support the spool on two points at each end. There are 3 sets of bearing blocks to accommodate the 2 different width spools. When either size spool is installed, one of the bearing block sets goes unused.

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