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Neufangled Robotics is presenting Stringman, an open-source cable-driven gripper robot listed at $795 that moves objects through a room using four ceiling-mounted anchors. The company reports a 1.9 kg average payload in a specified 7-by-7-by-3-meter room and says the system has accumulated about 1,000 hours of testing in homes. Independent performance and safety assessments are not provided in the source material.
Neufangled Robotics is presenting Stringman, an open-source, cable-driven robot listed at $795 that uses four motors and lines anchored near a room’s ceiling to move a gripper across the space. The company says the system can carry an average payload of 1.9 kilograms in a specified 7-by-7-by-3-meter room, offering a different approach to moving objects than a floor-based mobile robot or a fixed-reach robotic arm.
Stringman’s four anchors mount near the ceiling corners and suspend a gripper from tensioned lines. By adjusting the lines, the system can move the gripper within the area they define, including over floor space that the company says may be too cluttered for wheeled or legged robots. Neufangled describes the robot as suited to moving parts between workstations in a home lab, as well as building new automated behaviors.
The manufacturer lists a maximum payload of up to 2.2 kg near the floor and an average of 1.9 kg across the stated work volume. Its comparison uses a 7-by-7-by-3-meter room, a 28-newton line-tension limit, and payload figures net of the gripper and marker. The listed traverse speed is about 0.4 meters per second. These are company specifications, not independently verified results in the supplied material.
The robot’s hardware includes 3D-printed structural and decorative parts, two anchor cameras, a gripper camera, and small Raspberry Pi computers at the anchors and gripper. A separate computer runs the controller. The company lists 5 GHz Wi-Fi for the system, while specifying 2.4 GHz connectivity for the gripper. It says installation involves securing mounts to wall studs or structural columns, connecting the lines, and running a calibration process that takes about five minutes.
A Robot That Uses the Ceiling
Stringman’s central proposition is that a robot can reach a large working area without putting a mobile base on the floor or building a long mechanical arm. That could be useful in a small lab where equipment and worktables leave little room for a robot to drive around. The design shifts the trade-off: users gain overhead access but must accept lines crossing the room and permanent or semi-permanent ceiling-level hardware.
Neufangled says the system averages 1.9 kg of payload in the specified room and contrasts it with a seven-actuator, 0.75-meter arm using the same actuator type. The company reports 0.32 kg average payload for that arm, excluding the arm’s own link weight. Those figures depend on the stated setup and are company comparisons; they do not establish that Stringman can replace an arm for precision work, or that the systems were tested under identical conditions beyond the described actuator basis.
The project may also interest people who want to modify or study robot hardware. Neufangled says its mechanical CAD, circuit-board designs, software, build guide, and parts list are published, and describes the project as open source and OSHWA certified. An open design can make inspection and adaptation possible, but users still need suitable mounting points, tools, a controller computer, and the ability to assemble and calibrate the system.
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How the Cable System Works
Unlike a conventional serial arm, whose reach is bounded by its links and joints, Stringman places multiple anchor points around the workspace and controls the gripper through lines under tension. The company says the motors share the lifting force, with payload capacity peaking near the room’s center as the lines distribute the load more evenly. Its published comparison estimates 185 cubic meters of work area per $1,000 for Stringman in the stated room, against 0.35 cubic meters per $1,000 for a research arm. That comparison uses the company’s listed room dimensions and prices; it is not a general measure of productivity or performance.
The manufacturer says Stringman is intended for rooms with XY diagonals between 3 and 10 meters and heights between 2.3 and 4 meters. It recommends mounting anchors to wood-stud-backed drywall or plaster-wall mounts, or strapping them to structural columns. The lines remain in the room while the robot is installed, although the company says they sit near the ceiling when parked. Anchors can be detached from their mounts, leaving cleats behind.
Neufangled reports roughly 1,000 hours of testing in real homes to date. It also says the system can run on a local Wi-Fi network, with a locally served interface and AI models hosted on the user’s own hardware. Its site describes an optional remote-management route that involves linking the robot to an account; the supplied material does not provide details sufficient to assess that service’s data handling independently.
“Tension is all you need.”
— Neufangled Robotics
Performance and Installation Questions
The supplied material is a product description from Neufangled, and it does not include independent tests of the stated payload, speed, room coverage, or cost comparisons. The company reports about 1,000 hours of home testing, but does not identify the number of homes, test procedures, failure rate, or conditions behind that total. It is also unclear whether the listed $795 price includes every component, shipping, taxes, or any required accessories.
Safety is another area where independent evidence is not provided. Neufangled says that when line tension reaches 28 newtons, the motors relax and the lines can be pulled loose. The material does not describe testing with people nearby, the behavior during power or network failure, maintenance requirements, or certification beyond the project’s stated OSHWA certification. Prospective users would also need to check whether their walls, studs, columns, room layout, and ceiling fixtures suit the installation. The company says lines can be arranged to avoid some ceiling fans and fixtures, but rooms with a low object at the center may not be suitable.
Build Guides and User Testing
The company directs prospective builders to its parts list, STL files, build guide, and code, and provides picture and video installation guides. Its published setup process calls for mounting the anchors, connecting the gripper lines, and calibrating the system for the room. Users will need a computer to run the controller and the tools and access required to mount hardware near the ceiling.
Neufangled also describes a Python API and an MCP server for agent-based workflows, alongside tools for collecting training data and trying supported robot-control models. The company says certain behaviors may be learned from as few as 50 episodes, but the source does not specify which tasks, success rates, or evaluation conditions support that figure. Further details about pricing coverage, broader availability, independent safety testing, and long-term reliability would help clarify how readily Stringman can move from a published design into routine use.
Key Questions
What is Stringman?
Stringman is a cable-driven gripper robot from Neufangled Robotics. Four ceiling-level anchors control lines attached to a gripper, allowing it to move objects within a room-sized work area.
How much does Stringman cost?
Neufangled lists the robot at $795, or roughly $800. The supplied material does not clarify whether that price includes shipping, taxes, or every component needed for installation.
How much can it carry?
The company lists a payload of up to 2.2 kg near the floor and a 1.9 kg average for a specified 7-by-7-by-3-meter room. Those are manufacturer figures, and independent verification is not included in the source material.
Does Stringman need to be connected to the internet?
Neufangled says it can run on a local Wi-Fi network, with its interface hosted locally and AI models running on the user’s computer. The company also describes optional account-linked remote management; the source does not independently verify its data-handling practices.
What does installation require?
The company says users need suitable wall studs or structural columns, a drill, a step ladder, and a computer for control. Its stated setup involves mounting the anchors, connecting the lines, and running a calibration process that takes about five minutes.
Source: neufangled.com
