Open-source, open-hardware DIY high-temperature CoreXY FFF platform.
Valkyrie V2 is a complete redesign of the Valkyrie high-temperature printer platform. The design focuses on structural rigidity, high-temperature operation, serviceability, thermal separation, and automated calibration.
The standard electrical configuration is 220-240 VAC. A 110-120 VAC configuration is possible only with configuration-specific heaters, power supplies, switching devices, wiring, connectors, and circuit protection.
This repository contains Valkyrie V2.0.0-rc.1, the first release candidate for the Valkyrie V2 platform. Recommended operating values are separated from verified prototype results throughout the documentation. Materials and operating conditions that have not yet been validated are identified accordingly.
Explore the complete Valkyrie V2 assembly directly in Autodesk Fusion:
➡️ Open the Valkyrie V2 Fusion 360 Model
The online model includes the latest public design and allows you to inspect the complete assembly and individual components directly in your browser or Fusion 360.
| System | Specification |
|---|---|
| Architecture | CoreXY |
| Build volume | 330 × 300 × 280 mm |
| Bed plate | 350 × 350 × 8 mm cast aluminium 5083 |
| Build sheet | 330 × 330 mm removable build sheet |
| XY motion | External dual-motor CoreXY with all-metal MGN12 linear rails |
| Z motion | Three independently driven belt-lift Z axes |
| XY motors | 2 × NEMA 17, 48 mm, 55 N·cm, 2.5 A, long-shaft |
| Z motors | 3 × NEMA 17, 40 mm, 45 N·cm, 2 A |
| Extruder | BTT V2X, 7:1 gearing, 73.5 N (7.5 kgf) rated extrusion force |
| Hotend | Custom water-cooled Valkyrie high-temperature hotend |
| Maximum nozzle temperature | Up to 500 °C |
| Maximum build-plate temperature | Up to 150 °C |
| Active chamber | Up to 110 °C verified |
| Chamber heater | 750 W PTC heater, configured as RRF Chamber 0 |
| Drybox heater | 300 W PTC heater, configured as RRF Chamber 1 |
| Chamber lighting | 3 × 350 mm, 24 V LED strips |
| Controller | Duet 3 6HC |
| Firmware | RepRapFirmware with Duet Web Control |
| Standard input | 220-240 VAC |
| Optional input | 110-120 VAC with configuration-specific components |
| Performance | Recommended | Verified |
|---|---|---|
| Print speed | Up to 500 mm/s | 1,000 mm/s |
| Acceleration | Up to 10,000 mm/s² | 10,000 mm/s² |
| Volumetric flow rate | Material-dependent | 45 mm³/s |
| Chamber temperature | Up to 110 °C | 110 °C sustained for 60 min |
| Drybox temperature | Up to 80 °C | 80 °C |
| Maximum travel speed | Up to 500 mm/s | 1,000 mm/s |
| Chamber heat-up | — | 30 min to 100 °C from 25 °C ambient |
Recommended values are intended as practical operating limits for the Valkyrie V2 reference configuration. Actual print settings depend on material, nozzle size, layer height, toolhead configuration, cooling, firmware tuning, and operating temperature.
Verified values represent results demonstrated on the Valkyrie V2 reference machine and should not be interpreted as required operating settings for every build.
- Aluminium extrusion frame assembled with M6 blind joints.
- Relocated upper rear extrusion for improved chamber sealing, panel installation, cable routing, and service access.
- Additional centre-rear Z extrusion for stiffness and support.
- Vertically lifting overhead door that does not require outward swing clearance.
- Reinforced door brackets with 625ZZ bearings, shoulder bolts, and linked side mechanisms.
- Primary electronics, motors, radiator, pump, and part-cooling blower positioned outside the heated chamber where practical.
- External 2.5 A CoreXY motors with long shafts and upper shaft supports.
- 16T GT2 drive pulleys for increased torque and nominal motion resolution.
- F606ZZ flanged CoreXY idlers.
- High-temperature all-metal MGN12 linear rails.
- Three independent belt-driven Z axes with 5:1 reduction and automatic Z alignment.
- Cast aluminium 5083 bed plate.
- Three-point Maxwell kinematic mounting system using 10 mm bearing balls.
- Integrated SmCo magnets and locating pins for repeatable build-sheet positioning.
- Bed-mounted nozzle and Z-offset reference sensor.
- Automatic three-point Z alignment, mesh-bed compensation, nozzle-height measurement, and nozzle brushing.
- Water-cooled BTT V2X extruder motor and custom Valkyrie hotend.
- Closed-loop cooling system using a P67D pump, reservoir, and external 120 mm radiator.
- 750 W PTC chamber heater with a 120 CFM recirculation fan.
- Heated bed provides a secondary chamber heat source.
- Independent thermal switch and firmware-configured heater protection.
- External ROBO blower recirculates heated chamber air for part cooling through a CPAP hose and toolhead duct.
- Integrated heated filament drybox operating up to 80 °C.
- RepRapFirmware controls the drybox heater as Chamber 1.
- ESP32 monitoring of the DHT22 temperature/humidity sensor and filament load cell.
- Desiccant container and 625ZZ-bearing filament carousel.
- External filament buffer supporting automatic filament loading and unloading.
- Duet 3 6HC using all six onboard stepper-driver channels.
- Primary 24 V, 350 W power supply and secondary 12 V power supply.
- TS35 DIN-rail mains and 12 V distribution.
- Three solid-state relays for the bed, chamber, and drybox heaters.
- Three 350 mm, 24 V chamber LED strips: two vertical front strips pointing toward the rear and one top-front strip pointing toward the toolhead/build area.
- RepRapFirmware and Duet Web Control.
- Input shaping, pressure advance, automatic Z alignment, mesh compensation, thermal monitoring, and configurable print-start and print-end sequences.
Valkyrie V2 uses RepRapFirmware and Duet Web Control on the Duet 3 6HC.
The tested Valkyrie V2 firmware configuration is included in this repository:
Open Valkyrie V2 Firmware Files
The supplied firmware package contains:
sys– RepRapFirmware configuration, homing, system and safety filesmacros– Valkyrie-specific probing, calibration, nozzle and utility macrosfilaments– material-specific filament configuration, load and unload files
These files are configured for the Valkyrie V2 reference machine and should be used as the basis for the printer firmware setup.
For RepRapFirmware and Duet firmware upgrade procedures, follow the Valkyrie firmware upgrade guide:
Valkyrie Firmware Upgrade Guide
Back up the SD card before making firmware or configuration changes.
Machine-specific settings such as input shaping, probe offsets and filament profiles may require adjustment on individual builds.
Validated on the current prototype:
- PLA
- PETG
- ABS
- ASA
- PA and PA-CF
- PC, PC-CF, and PC blend CF
- PPS, PPS-CF, and PPS-GF
Still to be verified:
- PSU
- PPSU
- PEI (Ultem)
- PEKK
The technical overview describes the machine architecture and prototype configuration. It is not an assembly manual or electrical wiring guide.
For build assistance, troubleshooting, and questions about Valkyrie V2, please join the official Project Valkyrie Discord server:
Valkyrie V2 uses mains-voltage heaters, high current, high temperatures, moving machinery, and liquid cooling. Mains-voltage components, wiring, connectors, protective earth, fusing, insulation, and clearances must be selected and installed for the configured input voltage by a qualified person in accordance with applicable regulations and manufacturer ratings.
Do not use the project documentation as a substitute for electrical design verification, risk assessment, or compliance testing.
Roy Berntsen - Project lead, primary mechanical designer, and system integrator.
- Mark Bridgewater - Design, electronics, firmware, testing, and documentation.
- Chris Lombardi - ESP32 firmware.
- RepRapFirmware
- Duet Web Control
- Duet3D
- BIQU
Beginning with V2.0.0-rc.1, Valkyrie V2 is released as an open-source and open-hardware project.
- Hardware design files: CERN-OHL-S-2.0
- Valkyrie firmware, macros, and configuration: GPL-3.0-or-later
- Documentation and original project media: CC-BY-4.0
Earlier tagged releases remain under the licence terms under which they were originally published. Third-party materials remain subject to their respective licences.
See License.md and the full licence texts in LICENSES.