Multiplexer redesign for Prusa Multi Material Upgrade (no brass) by Modulustech

Last crawled date: 3 years ago

Please print with a minimum of 4 perimeter layers. This allows for the Festo fittings to be threaded without cracking.
It is highly recommended to take a "used" piece of filament (ridges help) and make sure that each feed path has no resistance. Since it is printed out of PLA, the more you work filament through each feed path, the better this should work.
There is no need for any brass press in fittings or steel tubes in the feed paths. Simply take the Festo fittings and thread them directly into the plastic. There are no threads printed into the model so you will have to force it a little to get it to start threading. I recommend using a sturdy pair of needle nose pliers so you can guide it into the correct orientation during threading. This is the only hard part of making this work. The closer you get the Festo fitting to being parallel to the feed path, the better this will work.
I have tested this, and it has successfully printed a multi color print. There is a kind of "break in" period, while the feed paths wear in, but theoretically, the longer you use it, the better it should work.