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Neufangled Robotics is presenting Stringman, an open-source cable-driven robot listed at $795 that uses four ceiling-mounted anchors to move a gripper around a room. The company reports an average payload of 1.9 kilograms in a specified 7-by-7-by-3-meter room, but the figures and performance claims come from the maker, not independent testing.
Neufangled Robotics is offering Stringman, an open-source, cable-driven robot listed at $795 that uses four ceiling-mounted anchors to move a gripper across a room. The design takes a different approach from a conventional robotic arm: instead of reaching from a fixed base, it suspends the gripper on lines and uses motors at the room’s corners to position it.
The company says Stringman is intended for rooms with an XY diagonal between 3 and 10 meters and ceiling heights from 2.3 to 4 meters. Its published figures list a traverse speed of about 0.4 meters per second and a payload of up to 2.2 kilograms near the floor. For a particular 7-by-7-by-3-meter room, Neufangled reports an average payload of 1.9 kilograms, measured at a 28-newton line-tension limit and after subtracting the 638-gram gripper and marker.
The system uses four motors, cameras at the anchors and gripper, and small Raspberry Pi computers for the anchor and gripper hardware. A separate computer runs the controller. Neufangled says the mechanical CAD, circuit board designs, software, bill of materials and build instructions are published, and describes the project as open source and OSHWA certified. The company also says Stringman can run locally on a Wi-Fi network without sending robot data off that network.
Installation requires mounting the anchors near the ceiling on wall studs or structural columns, connecting the lines, and calibrating the system. The manufacturer describes calibration as an automated process that takes about five minutes. Lines remain in the room while the robot is installed, though the company says they sit near the ceiling when the gripper is parked. Its stated tension limit is 28 newtons; Neufangled says the motors relax at that limit so the lines can be pulled loose.
A Different Way to Cover a Room
Stringman’s pitch is that overhead cables can cover more floor area than a desktop arm without requiring a mobile base. That could make the system useful for moving parts between workstations in a home lab, or for reaching areas blocked by floor clutter. Its potential appeal is not simply the gripper’s payload: it is the prospect of accessing a large work area with a relatively small number of actuators.
Neufangled compares Stringman with a 0.75-meter serial arm using the same model of direct-drive actuators. For the specified room, the company reports an average payload of 1.9 kilograms for Stringman, against 0.32 kilograms for the arm, and claims far greater work volume per dollar. Those are the manufacturer’s comparison figures and depend on its chosen room, assumptions and hardware; they are not an independent evaluation. The practical trade-off is also clear: a room-spanning workspace requires fixed mounting points and lines overhead, rather than a self-contained arm that can be moved between tables.
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From Fixed Arms to Ceiling Lines
Most tabletop robotic arms reach within a limited radius of a base. Stringman instead uses four corner anchors and lines attached to a central gripper, with the lines defining its working area. By distributing the load among motors, the architecture is designed to move an object across a larger volume than an arm of similar scale. The company’s comparison uses a 7-by-7-by-3-meter room, equivalent to a stated 147 cubic meters of work area.
The project is also aimed at experimentation as well as physical transport. Neufangled lists a Python API and MCP server for connecting workflows and says users can collect training data through its interface. Its site names several robot-learning approaches and says some behaviors may be learned from as few as 50 episodes. These are descriptions of supported tools and the company’s claims about training; the supplied material does not include independent results showing how reliably the robot performs specific tasks.
““Tension is all you need.””
— Neufangled Robotics
Independent Testing Is Not Provided
The available information is published by Neufangled Robotics, and no independent testing, customer review or external validation was included in the source material. The payload, speed, room coverage, installation time and accumulated testing hours should therefore be understood as company-reported specifications or claims. The company says the system has accumulated about 1,000 hours of testing in real homes, but does not provide a testing protocol or results broken down by task.
It is also not clear from the material what the $795 price includes, how much a complete installation costs after tools or mounting supplies, or how the robot performs across different room layouts and loads. The manufacturer says rooms need secure mounting points and that low-hanging objects in the center of a room can prevent installation. Its safety description covers the 28-newton tension limit, but the supplied information does not establish broader safety performance around people, pets or household objects.
Installation and Use Will Test the Design
The next evidence will come from installations and use beyond the manufacturer’s reported testing. Buyers and builders will need to assess whether their rooms have suitable studs or columns, whether the overhead lines are acceptable in daily use, and how consistently the robot handles their intended objects. Neufangled provides build materials and setup instructions, but the source material does not give a schedule for a broader release, independent evaluation or additional product versions.
Readers considering the project can check the published bill of materials, CAD, software and mounting guidance before committing to a build. Key points to verify include the cost of all required components, the mounting method for a particular room, and whether the room’s fixtures leave a safe operating volume. Claims about payload and training performance will remain manufacturer-reported unless outside tests are published.
Key Questions
What is Stringman?
Stringman is a cable-driven robot from Neufangled Robotics. Four anchors mounted near a room’s ceiling suspend and position a gripper across the area.
How much does Stringman cost?
The company lists a price of $795, often rounded to about $800. The provided information does not specify whether that figure includes every component or installation supplies.
How much can it carry?
Neufangled lists a maximum payload of 2.2 kilograms near the floor and an average of 1.9 kilograms in a specified 7-by-7-by-3-meter room. These are company-reported figures, measured with a stated 28-newton line-tension limit and with the gripper and marker weight deducted.
Does Stringman require cloud access?
The company says it can run on a local Wi-Fi network, with its interface served locally and AI models running on the user’s computer. Remote operation is described as optional and requires binding the robot to an account.
What kind of room can support it?
Neufangled specifies room sizes with an XY diagonal of 3 to 10 meters and heights of 2.3 to 4 meters. Installers also need secure mounting points near the ceiling and enough clearance from low-hanging fixtures.
Source: neufangled.com
