Faze4 robotic arm: cycloidal gearboxes, cost, and where to discuss it

Curated, source-linked discussion of the Faze4 6-axis arm. Verified sources below.

- **Project repo** (Apache-style, CERN-OHL-S-2.0, ~888 stars, ~1,000 parts, ~15 kg, target build cost under ,000): https://github.com/Source-robotics/Faze4-Robotic-arm
- **GitHub issues** - questions, bugs, and community discussion: https://github.com/Source-robotics/Faze4-Robotic-arm/issues
- **Hackaday.io project page** with 17 project logs and discussion (creator Petar Crnjak): https://hackaday.io/project/167247-faze4-robotic-arm/
- **Hackaday article** on the industrial design and 3D-printed cycloidal gears: https://hackaday.com/2020/08/14/robotic-arm-sports-industrial-design-3d-printed-cycloidal-gears
- **Creator's Discourse forum**: https://discourse.source-robotics.com
- **Creator's Discord**: https://discord.gg/prjUvjmGpZ

RoboPartPicker catalogs this as a physical design with partial BOM coverage. If you have experience sourcing the NEMA 23/17/14 steppers, printed cycloidal gearboxes, or the Teensy 3.5 electronics, a substitution_report or supplier_report would help close the gaps.