MSU

thingiverse

[](https://discord.gg/TXhCJRbFFt)  [ ](https://www.youtube.com/channel/UCF2tb5Hu6G_z-tB3_e_9U4A)  # Material Switching Unit (MSU) The Material Switching Unit is a multi-material upgrade based on the MMU2 by P*rusa(thingiverse likes to replace words with affiliate links... **** that) with key changes to make it more widely compatible and affordable. The device can be built for under 75 USD and will be compatible with most 3D printers if you are ready to do a bit of tinkering.  Hey everyone, just before you go deeper in the description if this is something that you want to build for yourself go check out the GitHub repo as this is only used to share the 3D files. Discord server: https://discord.gg/Z6RApfkKpK GitHub: https://github.com/PierreMasselot1/Material-Switching-Unit Youtube: https://www.youtube.com/channel/UCF2tb5Hu6G_z-tB3_e_9U4A This is a work in progress, the 3D files are bound to change and this comes with no guarantee of success. everything other than the merger can be printed without support and with a .2mm layer height. All the build info can be found on Github in the buildguide.md file. If you have any questions or just want to follow this project closely make sure to join the discord server as this is where I post updates the most frequently There are currently 2 versions of this device. One with the idler controlled by a servo motor and one with a stepper motor. The stepper version is still available to offer a second option as we solve bugs on the newer servo setup but it is highly recommended to use the servo version as the stepper version will be removed and become unsupported at some point. The firmware that controls everything is Marlin and we are currently working with a fork of Marlin with the MSU-specific code added to it. If this upgrade gets enough traction and once the code base is stable I will try to have our code merged into Marlin meaning that you will be able to directly get the firmware from the Marlin repo. For now, everything is in the submodule Marlin of the MSU repo and the direct link is: https://github.com/PierreMasselot1/Marlin/tree/bugfix-2.0.x The following are a couple examples of what can be done with the MSU in terms of multi-color prints: <img src="https://i.ibb.co/ZXKqCYj/IMG-1161.jpg" title="Water Dragon by Cipis">    on the multi-material sides of things I haven't had much time to try complex models but things like solvable supports and TPU/PLA combinations work pretty well: PVA / PLA  TPU(red) / PLA