Magnetic tool-changing system for 3D printers
This repository contains the 3D models and assembly files for the ZdeHav Toolchanger system, including the carriage (X-axis mount) and the toolhead assembly. The system is designed for high repeatability, ease of use, and compatibility with high-performance components.
The ZdeHav Toolchanger utilizes a magnetic coupling system combined with a three-point kinematic mount.
Reliable alignment is ensured by a three-point contact system:
- Hardware: Three acorn (cap) nuts and three standard hex nuts.
- Mechanism: The rounded tops of the acorn nuts seat into the centers of the hex nuts, providing a self-centering effect that ensures the toolhead always returns to the exact same position (high repeatability).
The system uses powerful neodymium magnets to hold the toolhead securely during printing and in the dock.
- Carriage-to-Head:
- Head: 3× 6mm neodymium cubes + 25×6×2mm rectangular blocks.
- Carriage: 3× 6mm neodymium cubes + 25×6×2mm rectangular blocks.
- Dock Retention:
- 3× Cylindrical magnets (Ø8mm, 8mm length) for secure docking.
The toolhead is designed for high-performance extrusion and compact size.
| Component | Specification |
|---|---|
| Hotend | Bambu Lab X1C Hotend |
| Extruder Gears | Bondtech-style dual drive gears |
| Motor | NEMA 14 stepper motor |
| Cooling | 3010 fan (dedicated for Bambu hotend) |
The assembly is designed with flexibility in mind regarding electronics:
- Custom Toolhead PCB: Optimized for the ZdeHav Changer PCB (CAN bus). This allows for a single-cable setup (Power + CAN) directly on the toolhead.
- Direct Wiring: Alternatively, the design supports routing individual cables ("dumb cables") to an external controller board elsewhere on the printer.
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This design is released under the MIT License.
Design: Zdeněk Havlát — zdehav.cz