Welcome to the 3MS Documentation

The 3MS is short for MMMS, which stands for Modular Multi Material System

The 3MS is a simple, compact, modular, reliable, budget-friendly multimaterial system.

Why 3MS?

Why use the 3MS when there are many other multi-material systems?

Here are a few reasons:

Simplified Design: Minimal mechanical complexity for increased reliability.
Low Cost: A 4-filament-unit 3MS can be built for ~$150 USD
Easily Sourceable: All the parts for the 3MS are available on Amazon. Alternatively, you can purchase a 3MS kit from West3D.
Comprehensive Documentation: Step-by-step guides to ensure smooth setup and operation.
Scalable: Easily expand the system to handle any number of filaments.

To use the 3MS, your setup should meet the following requirements:

Run legit Klipper firmware. Most printers that come with Klipper preinstalled use a modified version of Klipper and/or Linux that will impact your ability to setup Happy Hare firmware. Read more
Have SSH (PuTTY) access (99.9% of Klipper installations have this, and if you don't you really should setup SSH).
Have one spare USB port.
Have an adapter to install a PTFE tube to the inlet of your printer's extruder.
Have one filament sensor right before your printer's extruder.
Have a filament cutter (ideally between your printer's extruder and hotend). Alternatively, you can use IF-Cut.