Originally shared by Arthur Wolf
@Kliment_Yanev ( Author of Pronterface and the Teacup firmware amongst other awesome things ) is working on a multi-extruder chainable system for Smoothie.
It essentially allows you to add as many ( within reason ) extruders to any machine, simply by chaining boards together ( connecting one to the next, and that one to the next, etc ).
He’ just finished prototyping the first boards, and is looking it writing the firmware for it. This is a big part of the planned Smoothieboard v2 ecosystem.
You can find more information about this project at http://smoothieware.org/todo#toc24