3DPS RFF – A filament feeding system designed for real-world printing
3DPS RFF – A filament feeding system designed for real-world printing
Over the past months we have been heavily working on a project that solves a problem many 3D printing users know well: filament drag, unstable feeding and long-distance filament transport.
3DPS RFF – A filament feeding system designed for real-world printing
Over the past months we have been heavily working on a project that solves a problem many 3D printing users know well: filament drag, unstable feeding and long-distance filament transport.
Modern 3D printers are getting faster, larger and more advanced every year, but filament handling still often remains a compromise. Large spools, external dryers, long PTFE tubes or multi-meter filament paths can place significant stress on the extruder system. This can lead to inconsistent extrusion, increased wear, feeding resistance or even failed prints.
What is the 3DPS RFF?
The 3DPS RFF (Remote Filament Feeder) is a semi-passive intelligent filament feeding system that creates and maintains a controlled filament buffer directly before the printer.
Instead of forcing the printer’s extruder to pull filament through long and difficult paths, the RFF actively assists the feeding process and continuously adapts its speed to the actual filament consumption of the printer.
The result:
Reduced filament drag
Less stress on the extruder
More stable extrusion
Improved reliability during long prints
Cleaner filament handling for dryers and large spools
Designed for real-world setups
The RFF was designed with practical use in mind. Whether the filament comes from a drybox, a wall-mounted spool system or from several meters away, the goal is always the same: maintain a stable filament flow directly at the printer.
The system creates an approximately 50mm adaptive filament buffer near the extruder, allowing the printer to retract and feed normally while the RFF dynamically compensates in the background.
Main features currently in development:
Adaptive feed control based on real filament usage
Long-distance filament transport support
Support for large spool systems and dryers
Low stress operation for direct-drive and Bowden systems
Broken filament detection
External filament sensor support
TMC2208 silent motor driver
USB Type-C interface
External extruder motor connector
Status LEDs and future expansion options
Future plans
The project is still actively under development, and multiple versions are planned:
RFF Standard – standalone intelligent feeder
RFF Pro – central controller for multiple feeder units
RFF Light – lightweight extension module for larger systems
Our long-term vision is to create a modular filament management ecosystem that remains fully printer and firmware independent.
Development status
The electronics, firmware and mechanical systems are already functioning in prototype form, and testing is continuously ongoing on multiple printer configurations.
We are currently focusing on:
Firmware refinement
Mechanical optimization
Long-term reliability testing
User-friendly mounting solutions
Preparation for wider public testing
More updates, videos and technical details will be shared soon.
Anycubic Kobra 3 Toolhead Project – Another Milestone: Successful Firmware Backup and Preparing for a CAN-Based Toolboard
Today marked another major milestone in the Anycubic Kobra 3 Toolhead project.
Our objective is not to modify or preserve the original firmware. Instead, we are developing a completely custom firmware that will transform the factory controller board into a Klipper-compatible CAN Tool MCU with only minimal hardware modifications.
Another Milestone Reached in the Anycubic Kobra 3 Toolhead Project
The Anycubic Kobra 3 Toolhead reverse engineering project has reached another important milestone. Recent work has shifted beyond simply identifying components toward building a comprehensive and structured hardware documentation system that will serve as the foundation for all future development.
Anycubic Kobra 3 Toolhead Project – First Hardware Documentation Milestone Completed
The reverse engineering project has reached another important milestone. Our recent work has focused not only on identifying individual components but also on building a structured hardware documentation system that will serve as the foundation for mapping the entire electronics assembly.
A new long-term development project has officially started at the 3DPS workshop.
The goal is to perform a complete reverse engineering of the original Anycubic Kobra 3 toolhead electronics.
Bambu Lab A1 and A1 Mini – Factory First Layer Issues
Several users of the Bambu Lab A1 and Bambu Lab A1 Mini printers have reported strange first layer issues that at first seem like slicer or filament problems, but are often actually caused by mechanical issues.
