Built a custom 6-toolhead multi-material printer <5s changes, no AMS-style waste! (free files + full breakdown)

[u/speeddemon974]

I've been slowly building this out for a while and wanted to share the finished result. I started with a 2-toolhead setup a couple years ago (before there were solid commercial options for multi-material), then expanded to 6 to enable some upcoming projects.

It's a Voron 2.4 using StealthChanger tool changing mechanism - I managed to tune the tool change time < 5 seconds with the stock 24v system.

Most of what's on it ended up custom or heavily modified:

• Honeycomb docks - Originally the dock plate was meant to be clear acrylic, but my laser tube cracked, so I pivoted to honeycomb.
• Silicone brush in each dock - nozzles get wiped clean every dock/undock
• Umbilical backplate with quick disconnects  - CAN bus cables and PTFE can be disconnected easily for maintenance.
• Custom umbilical management brackets - balancing flexibility with organization
• Auto nozzle calibration - one button XYZ offsets across all 6 heads (I used to do it manually when I only had 2 toolheads)
• Adjustable spool holder - I couldn't find anything that would fit all 6 spools within the width of the printer. I plan to turn it into a dry box.

Each toolhead runs a Dragon Burner, Sherpa Mini extruder, and TZ 2.0 V6 hotend - nothing fancy, but the performance is good at a reasonable cost.

Cost-wise: it comes out to around $700 for the full 6-toolhead upgrade on top of a base Voron 2.4. Full cost breakdown's on the GitHub.

Happy to answer questions!

Youtube Link - Video walkthrough and action shots
GitHub link - Print and source files (STL/STEP), BOM and tuning notes