Maxwell's Razor
A mostly 3D-printed toolchanger for the Hypercube EVO, using a mechanical coupling, magnetic clamping, and Klipper tool-change macros.
I designed Maxwell’s Razor to keep the toolchanger’s docking mechanism mechanical and minimize non-printed parts. A Maxwell-style kinematic coupling constrains the tool’s position, and neodymium magnets provide clamping force.
I first built a version with steel balls and metal dowels, then redesigned the contact geometry for a printed version. The carriage releases and picks up each tool by following a docking trajectory; the dock needs no servos or solenoids.
Klipper macros park the active head, pick up the next tool, and apply configured Z offsets. Sensorless X/Y homing reduces the changes needed to fit the Hypercube EVO. I published the CAD files and printer configuration under CERN-OHL-W-2.0 so others can adapt the design.