Ultimaker2 rail system (U2RS)

A printable back plate to mount onto your UM2, so you'll have 4 rails to mount stuff on. The aim is to provide some flexibility in positioning your feeder(s), spool(s) and whatever you want to experiment with...

3D printer parts and enhancements

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Ultimaker2 rail system (U2RS) , if you ever publish something compatible with these rails please TAG it with "U2RS".

A printable back plate to mount onto your UM2, so you'll have 4 rails to mount stuff on. The aim is to provide some flexibility in positioning your feeder(s), spool(s) and whatever you want to experiment with... For some more backgrount on this idea please read here:


No irriversable changes are required to your machine (-no drilling-), but it's designed for external use of your feeder motor(s). The 3 main parts of the backplate mount to your left and right feeder motor holes (use any M3 bolts you have, exesive length will disapear behind your motor covers), in the middle they mount to the "U2RS_MiddleScrewPlate" which you put into the holes of the original spool holder, the top mounts to 2 existing mounting screws

************************** WARNING: There is VERY little space behind the Z-stage. Make sure when you mount the "U2RS_MiddleScrewPlate" you'll place the screws from the inside of the printer to the outside (so screwhead inside, nut on outside) and only use screws with a thin head. To be sure you're ok check by rising your bed manually (power of, turn the Z-stage screw)... this is not like in the main picture ... **************************

For this first "starter kit" I made mounts for your feeder (which ever you use .. roberts, mine,  the UM2 original, or whatever you prefer) and spools. The "low friction compact spool holder" hangs loos into the brackets, for super quick changing. You can move stuff horizontally on the rails, and vertically in the brackeds by using the little spacers (I provided 20mm spacers, but you can adjust to whatever you need to keep things a bit organised i've published the "compact low friction spool holder" separately here ; https://www.youmagine.com/designs/compact-low-friction-spool-holder

The brackets for the spool holder come in 2 types, the left/right is the basic version, the "middle" is a few mm wider for when you when you want to use 2 spools next to each other on 1 backet. The single and double mounts have build in support, use a small plier to remove it (see picture), the backplates also have supports already build into the holes for the connectors.

I printed my back plate in colorfabb XT at 255c / 70c buildplate / 50 speed, butt it may be better to print a little cooler. When printing in higher room temperatures (it was around 30c when I did this) the glass plate may not cool down enough for your print to let go of the glass plate (it needs to cool till 20c), a few minutes in the fridge will do the job.

edit 1/2015 ; some minor changes, cleaned up the design of the brackets and spacers, changed the plate that mounts into the original spoolholder so screws will sink a bit deeper. All updates have v2 in the filename

edit 3/2016, added .stp file of backplates

Materials and methods

some M3 bolts and nuts



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F77664944d69a98a1027a8327d54ec7c?default=blank&size=40my3d added this to the UM2 collection ago
F6bba6d47d28e0fad811555a02b1c7de?default=blank&size=40Dennis added this to the UM2+ collection ago
Fe8aff430d86fa3086ffd41a9321d05a?default=blank&size=40Lion U added this to the Already made collection ago
Db8de2bac751bd8a45a2e2d5b7785d2f?default=blank&size=40yee379 added this to the ultimaker collection ago
A20e93a1398b300dad11aa1af7ae727f?default=blank&size=40jjbalboa added this to the UM2 Parts collection ago
Mini simbolo logo3dsolid 90 80pxFerGazz added this to the Upgrades and Mods collection ago
D3daa197cb20302a41ba85ef91809c78?default=blank&size=40Sts0mrg0 added this to the UM2 collection ago
199324f4c7196bc3d0b31e593e7d893f?default=blank&size=40YCheez added this to the Printer collection ago
1ad9f6f09cfe64b36f1cddb88eeaa419?default=blank&size=40Rupert Shih added this to the Others collection ago
Fcb3469695c95a5e23c2429eaae67447?default=blank&size=40Adam RΔ™kosiewicz added this to the mods collection ago
Mini lisca mangaLisca added this to the ultimaker up's collection ago
3418b0b6467dc904b638d3cf0cad2dad?default=blank&size=40RogerWilco added this to the UM Mods collection ago
58db54a73b9b0d5ad96b70d8805c84ec?default=blank&size=40luukakkerman added this to the Ultimaker2 parts collection ago
Mini dsc 0153Casey added this to the Ultimaker Accessories collection ago
41ed0417728a0736e2467d789aa9e06d?default=blank&size=40Luca Costabile added this to the Ultimaker 2 collection ago
Fa488de7a20df9a0e0805f50b0b0f9f2?default=blank&size=40Erwin Pixel (Pixelmagic) added this to the Things 2 make collection ago
410e40bd9fccc440fa4118689a8d6853?default=blank&size=40stevetfidalgo added this to the Cool Stuff collection ago
Cb013efa08026866713ee8ea4f98a733?default=blank&size=40Sergey Fedorov added this to the Ultimaker 2 Upgrade collection ago
A5c0f84d51eb49dc910dd074c2b19dff?default=blank&size=40ChrissyP added this to the Feeder collection ago
Mini ulti2arjanUltiArjan commented ago

I think I used 50% and 1.2 mm walls, but 50% is probably overkill...

4cb43586d977c56ba0898af99a4e0227?default=blank&size=40codemercenary commented ago

What infill percentage do you recommend for the back plate?

Mini imageChase added this to the Add ons collection ago
003d845ef9a66971449e775bad45dab5?default=blank&size=40valentt added this to the Ultimaker 2 upgrades collection ago
396e53047db5fedbd8c27c2ef7509f97?default=blank&size=40drofnas added this to the Printer Upgrades collection ago
30fbe88468deb3ea1a8e78af2cdb843f?default=blank&size=40erikgj added this to the UM2 Upgrades collection ago
Mini screen shot 2013 07 15 at 6.49.36 pmErik de Bruijn added this to the Ultimaker 2 upgrades! collection ago
Mini ulti2arjanUltiArjan published this design ago