Multi-color printing on a single extruder usually means mountains of purge waste and print times that stretch into the next day. This build attacks that head on: a Voron V2.4 CoreXY assembled from a Formbot R2 kit, dressed with DoomCube mods, and fitted with a Stealthchanger toolchanger running six complete heads. Each head pairs a Dragonburner with an Orbiter 2.5 extruder and a Rapido HF hotend.
The machine is fully enclosed, with a docking rack along the top back of the chamber holding the idle heads. Every docked head carries an illuminated LED ring and a circular display with percentage readouts. Above the front door, an embedded screen runs a web interface with temperature graphs, tool status and live camera views, and a Legion Go acts as the printer's screen. That Legion Go pick makes good sense to me given the machine is headed into a shared office, where browsing and slicing right at the printer beats hauling a laptop over. For XY homing, sensorless was the pick, keeping cable chains out of the picture.
The proof came from a Mini Cooper kit card scaled down to 100mm: 579 tool changes with not one stumble, 82g of filament and 28g of waste in under 8 hours. Sliced on a Bambu A1, the same model would burn 278g as waste and take 26 hours. A purge tower runs alongside the part to normalize nozzle pressure; without one there is plenty of under extrusion.
It is not all finished. The LDO Hexa board in the kit disconnects at the slightest bump, and the plan is to move to a Fysetc Fusion Distro once it eventually gives out. Stringing and mess still need tuning, and the top cables are just hanging out the back for now. All in, roughly $4000 AUD, a bit under what an H2C would run, which strikes me as a fair price for six independent tools.
Project by Toolpath Labs. Watch it on their YouTube channel: