Rouleau à fromage - Ikea Skadis Spool Roller

Quick facts

• Uses 4x 608ZZ bearings.
• Designed for common 1 kg spools of 200 mm diameter, slightly larger up to 220 mm or smaller down to 180 mm should work well too.
• Short version for 250 g spools of 140mm diameter is also included.
• Practically tested with 1,1 kg spools weighing 1,4 kg in total.
• The mm sizes are the spool width measured from outside to outside. STLs provided in 5 mm steps and some common spool widths in between.
• Easy print, can be printed in stages as it's split in several parts.

I want this, shut up and get me there, NOW!

• PLA is fine, and I only tested with PLA.
• 0.2 mm layer height.
• 3 perimeters (1.2 mm wall width for a 0.4 mm nozzle).
• 20% infill for all parts, except the hooks and mounts which should be printed with 100% infill.
• All parts are oriented in the STLs the way they should be printed.
• Choose between 2 or 3 Skadis slots height. It's designed for 2 slots. If you want to add some strength to it for really large spools, go with the 3U version.
• 4x 608ZZ bearings needed. Either buy, or print one of the many options around.
• See "Part selection" some lines below, and select the right parts.
• Print!
• Assemble! See the pictured instructions for assembly on the bottom of this thing page.
• Guide the filament through the holes in the mount plate.
• See below for further details about things like mounting multiple CheeseRollers above each other, or rendering for another spool width.

Part selection

the ZIP for your spool width measured from outside to outside, round up to the next 5 mm step if your spool width is between the available sizes. For example CheeseRoller 68mm.zip for a spool with 68 mm width, or CheeseRoller 55mm.zip for a spool with 52 mm spool width.

Each ZIP contains all parts for the variations that can be printed for the ed spool width. Select the parts inside the ZIP by the following guide, swap XX with your spool width:

• 1x Arm Left, print with 20% infill, choose between:
  • CheeseRoller Arm Standard 2U Left.stl: 200mm spools, 2 Skadis holes high
  • CheeseRoller Arm Short 2U Left.stl: 140mm spools, 2 Skadis holes high
  • CheeseRoller Arm Standard 3U Left.stl: 200mm spools, 3 Skadis holes high
  • CheeseRoller Arm Short 3U Left.stl: 140mm spools, 3 Skadis holes high
• 1x Arm Right, print with 20% infill, choose between:
  • CheeseRoller Arm Standard 2U Right.stl: 200mm spools, 2 Skadis holes high
  • CheeseRoller Arm Short 2U Right.stl: 140mm spools, 2 Skadis holes high
  • CheeseRoller Arm Standard 3U Right.stl: 200mm spools, 3 Skadis holes high
  • CheeseRoller Arm Short 3U Right.stl: 140mm spools, 3 Skadis holes high
• 2x Hook (4x for sizes larger than 123), print with 100% infill, choose between:
  • CheeseRoller Hook 2U.stl: 2 Skadis holes high
  • CheeseRoller Hook 3U.stl: 3 Skadis holes high
• 1x Mount, print with 100% infill, choose between:
  • CheeseRoller **XXmm Mount 2U.stl**: 2 Skadis holes high
  • CheeseRoller **XXmm Mount 3U.stl**: 3 Skadis holes high
• 2x Roll, print with 20% infill: CheeseRoller **XXmm Roll.stl**
• 2x Pin, print with 20% infill: CheeseRoller **XXmm Pin.stl**
• 1x Connector, print with 20% infill: CheeseRoller **XXmm Connector.stl**
• 4x 608ZZ bearings (either bought or find some printable bearings that are all around)

Example part list for a standard 1 kg spool, 68 mm wide, 200 mm diameter, being two Skadis holes high:

• 1x CheeseRoller Arm Standard 2U Left.stl
• 1x CheeseRoller Arm Standard 2U Right.stl
• 2x CheeseRoller Hook 2U.stl
• 1x CheeseRoller 68mm Mount 2U.stl
• 2x CheeseRoller 68mm Roll.stl
• 2x CheeseRoller 68mm Pin.stl
• 1x CheeseRoller 68mm Connector.stl

Example part list for a small 250 g spool, 42 mm wide, 140 mm diameter, being two Skadis holes high:

• 1x CheeseRoller Arm Short 2U Left.stl
• 1x CheeseRoller Arm Short 2U Right.stl
• 2x CheeseRoller Hook 2U.stl
• 1x CheeseRoller 45mm Mount 2U.stl
• 2x CheeseRoller 45mm Roll.stl
• 2x CheeseRoller 45mm Pin.stl
• 1x CheeseRoller 45mm Connector.stl

The print is started, I got a cup of tea, now tell me the story.

+++ Why another spool roller? +++

Filament is a fascinating material. I like to stroll through webshops, reviews and videos about filament. Every filament delivery that arrives, makes the day a slightly happier one.

To keep up that happiness, you have to have some ideas to get rid of the ugly little attachments that the workflow of a filament spool brings into the game:

• You need to store them in a place, where you can reach them easily.
• You want to see your current stock without scrabbling through cabinets and drawers.
• As your filament collection grows, your solution needs to be extensible.
• Spools packed in their cover until their first usage, should be storable.
• Loading filament should be a hassle-free task.
• Unloading filament too.
• You shouldn't care about tangling filament and stuffing the tip of the filament somewhere, where it doesn't drive you crazy the next time you grab the spool.
• Actually you even shouldn't need to grab the spool and carry it around. They should be where you use them, somewhere next to your printer.
• 3D Printing is about beauty and design. When storing the filaments visibly, the storage should at least satisfy some degree of beauty.

When deg parts to be printed, you also need to take care of the print process:

• The print should use as less filament as possible.
• It should be easy to print. So it shouldn't need s, and the print should be fast, or it should be possible to do in a couple of stages.

+++ The base for the idea +++

A widely used technique to store things are pegboards. A popular option for DIY crafters is Ikea's Skadis pegboard. It's cheap, easy to mount, comes in an unobtrusive white, and there are a ton of things to print for it. So I experimented with a couple of spool holders and rollers for the Skadis pegboard. All worked great for a single, or a couple of spools. They all solved some issues mentioned, but none solved them all.

+++ Analysis and inspirations +++

I wanted to solve all the mentioned issues. So I began to analyse all the options I tried, and the options I could find. The primary inspirations came from The Filler (https://www.thingiverse.com/thing:3020026), for which I even created a Skadis brace (https://www.thingiverse.com/thing:4810681), and the most simple Skadis spool roller I could find (https://www.thingiverse.com/thing:4193268), for which I created a printable hook (https://www.thingiverse.com/thing:4810695).

+++ The development +++

It took two months of deg, printing prototypes and testing stability, until the CheeseRoller was done. It's name came up when I started to cut holes and slots into it's main frame like if I wanted to make it look like Swiss Cheese. That was suitable, as holes in cheese appear, when it matures, just like the CheeseRoller did mature at this time. The holes and slots are a measure to save material, speed up print time, and make it sturdy enough for rotating filament spools, as all the holes and slots add perimeters that make it stiff.

+++ What about all the sizes? +++

You could use just one size that fits them all. If all your spools are between 60 and 70 mm wide, measured from outside to outside, you could just print a couple of 70 mm CheeseRollers. The 60 mm spool will fit right away in the 70 mm CheeseRoller as the spool just stands on the two rolls. The narrower the spool, the more it tends to tilt a bit when the filament is pulled, especially if the spool is nearly empty. For this case better use one that fits your spool width. If you have a 42 mm wide spool, take 45 mm.

To avoid that the spool is clamped between the arms of the frame, every size adds 2 mm on the left and on the right. The 60 mm size actually is 64 mm wide on the inside. So the spool can move freely and will not be slowed down by touching the frame. This additional 2 mm also give you the opportunity to place spools still packaged in a plastic bag. If you want to place spools not only packaged in it's bag but also in it's cardboard box, look if you have a free CheeseRoller of slightly bigger size, as the cardboard box usually takes some more than 4 millimeters.

+++ Available sizes +++

I rendered for spool sizes from 40 mm upwards in 5 mm steps, some common spool widths in between like 68 mm, and also 120 mm and 140 mm for even larger ones.

+++ Rendering custom sizes +++

If you need another size, the OpenSCAD Sources are attached. The arms and the hook are the same for all sizes, you can the STLs here. For the other parts CheeseRoller Sources.zip, unzip and load CheeseRoller Connector.scad, CheeseRoller Mount.scad, CheeseRoller Pin.scad and CheeseRoller Roll.scad in OpenSCAD, enter the SPOOL_WIDTH in the OpenSCAD customizer, render the parts with F6 and save the STL with F7.

+++ Tests +++

Note that I only tested with spools of up to 85 mm wide and 1.4 kg of weight. Double check when using heavy spools that need a 120 mm or even a 140 mm CheeseRoller, if the weight is carried safely by the CheeseRoller and also the Skadis board itself. Spools carrying way more than 1kg of filament usually also have a larger diameter than 220 mm and will be too large for the design. I also don't use spools of that size. So my intention wasn't deg and testing for those sizes.

+++ Printing duration +++

If you print infrequently, are a beginner or can't let the printer run for some hours, you probably embrace print projects that can be printed in parts. The parts that take the longest time are the arms, or above 70 mm size the roll. An arm takes about 2.5 hours on my Creality CR-10 V2 when printed with 0.2 mm layer height and a 0.4 nozzle. The roll for 68 mm size takes about the same time as a single arm. If you can spare another 30 minutes, print two rolls at once, it won't take twice as long, just about half an hour more for a 68 mm roll. Well, that's nothing I can be ed for because of the design, that's just kinda print and slicer magic.

+++ Printing +++

Printing the parts is easy. I only used and tested with PLA. PETG or ABS may work well too, but test it before printing CheeseRollers for your whole wall.

The parts are all oriented the way they should be printed in the STL. Just load all the parts into your slicer and print it. The longest parts are the arms. They are just below 225 mm long. If your print volume is smaller, try to rotate them by the Z axis. They should fit a 200x200 mm buildplate when rotated so they are placed diagonally on the build plate.

+++ Print settings +++

The relevant recommended print settings:

• 0.2mm layer height
• 3 perimeters (1.2mm wall width for a 0.4mm nozzle)
• 20% infill for all parts, except the hooks and mounts which should be printed with 100% infill.

+++ What about the filament path? +++

To guide the filament from the spool it carries, there are vertical holes with rounded edges in the mount plates. Just guide the filament through them. If you want to give it some more guidance, you can run a regular PTFE tube with 4 mm outer diameter through the holes. Just be aware of the friction added by additional PTFE tubes on the filament's path to the printer.

When you unload the filament from the printer, roll the spool back, so the filament just stays out a bit from the bottom mount hole. The next time you load it, grab the filament and pull it to your printer. The roll takes care of itself and unwinds.

An alternative way without any further materials needed is to just pull the filament down between the mount and the back roll. When the feeder pulls, and the spool unwinds, the back roll also rotates in the same direction as it should to give the filament a good go downwards. Depending on the position of your printer, the filament needs to go sideways and wander on the bottom edge of one of the arms. The friction there should be low, depending on how far it needs to go sideways. Just check that path if under extrusion occurs.

+++ Placing multiple spools vertically +++

If you wonder why there is more than one path for filament, that's for guiding filament from multiple CheeseRollers mounted above each other. There are three hole paths in the mount plates. The middle one is intended to be used for the filament of the spool the CheeseRoller actually carries. The other two could be used to guide filament from CheeseRollers mounted above. Additionally, there are holes for filament in both arms. Look on the arms from the top, you see the holes about 15 mm inset from the back. On a standard Skadis board there is enough room to place three CheeseRollers vertically. So the three PTFE paths in the mounts should be enough if you create filament paths straight down across the whole Skadis board.

+++ and remixes welcome! +++

If you like the design and print one or two CheeseRollers or fill a whole Skadis board with CheeseRollers, feel free to give some in the comments or post a make. Also feel free to remix it. All parts are designed using OpenSCAD, the source files are attached. If you find optimizations I'd be glad if you ping me in the comments and give me a hint about what could be optimized.

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