A new community-developed project called PolyDye offers FDM 3D printer users an alternative approach to multi-color printing. The system adds inkjet printing capabilities to existing FDM printers by incorporating an inkjet cartridge that applies color directly to printed objects.
The PolyDye hardware setup consists of a main board, daughter board, several 3D printed components including an inkjet cartridge holder, and associated wiring. While the system is designed to be compatible with various FDM printers, current functionality is limited to machines running Marlin-based firmware.
The printing process requires users to prepare their 3D models through multiple steps, including processing through OrcaSlicer with a custom profile and generating specific inkjet printing instructions. The system applies ink to each printed layer as it is produced, using standard translucent filament as the base material.
Beta testing units of the PolyDye system are currently available for purchase at $199. The project developers plan to release DIY files through GitHub, allowing users to build their own units using publicly available documentation.
The technology offers potential advantages over traditional multi-filament color printing methods, which typically require multiple filament changes and generate waste through wipe towers. The PolyDye system simplifies the coloring process by using standard inkjet cartridges and translucent filament as its only consumable materials.
source: hackaday.com