Stringman
Four motors reach a whole room: open-source cable robot, assembled for $795
Prices and stock checked 7 Nov 2026
- Type
- Cable robotNeufangled Robotics
- Build difficulty
- 3 of 5Advanced
- Build time
- 4 to 8 hours (maker estimate for the kit)
- License
- Hardware CERN-OHL-W 2.0software Apache-2.0
- Lowest price in stock
- $795at Neufangled Robotics
Where to buy the Stringman
| Seller | Price | Stock | Checked | |
|---|---|---|---|---|
| Neufangled Robotics Assembled, lead time 4 weeks | $795 | IN STOCK | checked 7 Nov 2026 | Buy |
| Neufangled Robotics DIY kit, you print the structural parts | $655 | OUT OF STOCK | checked 7 Nov 2026 | Buy |
| Neufangled Robotics Custom PCBs and specialty wire only, add the other BOM parts | $55 | IN STOCK | checked 7 Nov 2026 | Buy |
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What the Stringman really costs
| Part | Cost | Source |
|---|---|---|
| Stringman assembled, ready for installation and calibration Maker store price; lead time 4 weeks | $795 | neufangled.com checked 7 Nov 2026 |
| Stringman Hardware Kit (all BOM parts, you print the structure) Maker store price; sold out on the check date | $655 | neufangled.com checked 7 Nov 2026 |
| Custom PCBs and specialty wire only For builders who source the other parts themselves | $55 | neufangled.com checked 7 Nov 2026 |
| Full BOM total in the repo, bulk landed prices Maker spreadsheet, includes 4 DM-H6215 motors at $264.30 | $645.57 | github.com checked 7 Nov 2026 |
Pick one of the assembled robot or the kit, not both. Kit and BOM exclude 3D printing the structural parts, a drill, a step ladder and a computer with an NPU or GPU to run the controller. Shipping is added at checkout by region.
What it is
Stringman is a room-scale cable robot from Neufangled Robotics. Four motors in the ceiling corners reel in lines that hang a gripper, so it can carry up to 2 kg anywhere in a room and work above clutter. The mechanical CAD, PCBs and control software are published, and it can run air gapped on your own Wi-Fi.
Difficulty 3 of 5. Print the structural parts, build two anchors and a gripper, splice wires, mount in ceiling corners; the maker calls the kit a multi-day, fairly difficult build source
What it can do
- Carry up to 2.2 kg near the floor of a room from 3 to 10 m across
- Be controlled by gamepad, LeRobot models or an MCP server
- Run air gapped on your local network, no data leaves it
Demo and build videos
Parts list and links
Sourced facts
19 facts with links
- Motors: 4 Damiao DM-H6215 hub motors in the anchors, plus 2 STS3215 servos in the gripper source · checked 7 Nov 2026
- Payload: Up to 2.2 kg near the floor, 1.9 kg average over the work volume source · checked 7 Nov 2026
- Work area: Rooms 3 to 10 m (XY diagonal), ceiling height 2.3 to 4 m source · checked 7 Nov 2026
- Traverse speed: About 0.4 m/s source · checked 7 Nov 2026
- Gripper weight: 638 g source · checked 7 Nov 2026
- Cameras: 2 anchor cameras at 1920x1080 30 fps, 1 wide gripper camera at 684x384 60 fps source · checked 7 Nov 2026
- Compute: Your PC runs the controller; Raspberry Pi Zero 2W in the gripper, Pi 3A+ in the anchors source · checked 7 Nov 2026
- Materials: 3D printed: PET-GF for structural parts, PLA for decorative parts source · checked 7 Nov 2026
- Testing: About 1000 hours in real homes so far source · checked 7 Nov 2026
- Open hardware certification: OSHWA certified, UID US002788, certified 7 Nov 2025; the OSHWA page lists Apache-2.0 for everything source · checked 7 Nov 2026
- Hardware license: CAD, STL files, print guide and BOM are CERN-OHL-W 2.0 with an injury and damage disclaimer source · checked 7 Nov 2026
- Software license: Apache-2.0 on the control software repo source · checked 7 Nov 2026
- PCB design files: KiCad projects for the anchor and gripper boards, no license file in the repo source · checked 7 Nov 2026
- Air gapped use: Controller runs LAN-only with the UI served locally and AI models on your own hardware source · checked 7 Nov 2026
- Agent control: Python API and MCP server; LeRobot control with models such as Pi.05 and Multitask DiT source · checked 7 Nov 2026
- Lead time: 4 weeks source · checked 7 Nov 2026
- Kit pricing: Kit price is about $630 amortized landed cost of parts in bulk plus a margin; cheaper to source yourself in Asia source · checked 7 Nov 2026
- Install needs: Studs or columns for anchors, a computer with an NPU or GPU, a drill and a step ladder; calibration takes about five minutes source · checked 7 Nov 2026
- GitHub stars: 173 on nhnifong/cranebot3-firmware, last push 4 Nov 2026 source · checked 7 Nov 2026
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