MakerGear "Twin Extruder"

This is a proof-of-concept project for a magnetically-coupled dual extruder system with two independent single extruders operating on one belt drive. It is designed so that only specific movements of the X-axis belt are needed to transfer control from one extruder to the other, so that no additional electrical parts, electronics, or firmware is required beyond what is used in a standard dual-extruder system.

The principle of magnetic coupling introduced by this project should be generally ap