is a powerful, open-source high-temperature 3D printer designed for extreme materials and demanding applications. Built on a modified HevORT architecture, MeltCore-I brings industrial-grade capabilities into the hands of makers, researchers, and small businesses.
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Hotend up to 500 °C
Industrial-grade Chube hotend, water-cooled for continuous high-temp printing -
Enclosed heated chamber >120 °C
Powered by dual 400 W PTC heaters with active temperature control -
Custom heated bed 1600 W @ 230 V
Excellent thermal stability for PEEK, PEI, PA-CF and more -
Large print volume: 410×410×330 mm (XYZ)
In a compact 750×820×785 mm footprint -
CoreXY kinematics with NEMA 23 JMC closed-loop servos
Based on the HevORT motion system for high speed and accuracy -
Watercooled VzHextrudort with watercooled 6t stepper
Optimized for high-strength filament drive and heat resistance -
Precision bed motion with belts + 10:1 planetary gear steppers
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Beacon sensor
For accurate bed leveling and high-resolution probing -
CPAP blower for active part cooling
Controlled via PWM for reliable high-volume airflow -
Runs on Kalico firmware
Powered by Octopus Pro mainboard and Raspberry Pi 5
Full support for input shaping, remote tuning, and high-speed performance
- Firmware: Kalico - Klipper based
- Mainboard: 2x BigTreeTech Octopus Pro
- Host: Raspberry Pi 5
- Temperature control: PT1000 sensors, solid-state relays for bed and chamber and 230v electronics fans
- Motion: NEMA 23 closed-loop servos on XY, planetary gear stepper on Z
- Extruder: VzHextrudort as main extruder, and secound extruder with custom belay to counter long ptfe tube
- Cooling:
- Water-cooled hotend assembly
- CPAP blower for high-efficiency part cooling
- Active electronics cooling with filtered airflow
To be done...
All contributions are welcome – whether you want to improve documentation, fork the mechanics, or test firmware. Open an issue or pull request, or start a discussion!
For feedback, collaboration, or community support, open an issue or reach out via Discord.
Follow development and updates here on GitHub.
MeltCore-I is an advanced DIY high-temperature 3D printer platform intended for experienced makers, engineers, and small businesses.
It is designed for printing engineering-grade materials and requires careful handling during assembly and operation.
⚠️ This is not a plug-and-play printer.
MeltCore-I is a high-performance research and prototyping tool. Building and operating it requires technical knowledge in electronics, motion control, and thermal safety.
Please follow these principles during your build:
- Use certified components and proper wiring techniques
- Install thermal fuses, SSRs, and firmware-based thermal runaway protection
- Follow electrical codes and insulate high-voltage sections appropriately
- Ensure adequate enclosure ventilation for electronics and high-temp zones
- Use protective equipment during testing and maintenance
- Never leave the printer unattended during operation
MeltCore-I is an independent, community-driven open hardware project.
It is not affiliated with, endorsed by, or officially supported by any third-party hardware or firmware creators.
All product names and trademarks are the property of their respective owners.
This project integrates open-source components in good faith under their respective licenses to provide a new, capable tool for the community.
🛠️ No warranty or liability is implied.
Use this project at your own risk. Always comply with local safety regulations and workplace standards.