Stringman Is a $795 Ceiling Robot That Lifts 1.9 kg, and the Price Leaves Out the PC It Needs

Neufangled Robotics sells Stringman, a room-scale robot that hangs a gripper from four cables anchored in the corners of a room, for $795, according to the company's page. The design is open source and certified by the Open Source Hardware Association, and its Hacker News thread stood at 344 points on November 4, 2026. Stars and points are not adoption; the repository has 135 stars.

The price is the headline and the controller is the footnote. The page says Stringman needs a computer with an NPU or a GPU. The firmware repository, published under Apache-2.0, asks for at least 8 cores and 8 GB of RAM, and suggests a Ryzen 7 7840HS mini PC, a Mac mini or a gaming desktop. That machine is the real cost on top of $795.

What the specifications say

All figures below are vendor-stated by Neufangled.

Spec	Stated value
Room size	3 to 10 m diagonal, 2.3 to 4 m high
Payload	2.2 kg near floor, 1.9 kg average
Traverse speed	About 0.4 m/s
Cable tension cutoff	28 N
Gripper	638 g, two fingers and a wrist

The payload is measured at the 28 N line tension limit, net of the gripper, in a 7 by 7 by 3 m room. The page also claims about 500 times more work volume per dollar than a $2,500 research arm, and says a 7-motor serial arm would average 0.32 kg of payload against Stringman's 1.9 kg.

1. Stringman (average)1.9 kg
2. 7-motor serial arm, 0.75 m (Neufangled's figure)0.32 kg

Source: Neufangled Robotics product page, accessed 2026-11-04

No independent party is named as having run either number. The page says the system has about 1,000 hours of testing in real homes.

What an outside reporter found

Hackaday, in an article by Maya Posch dated June 15, 2026, described the builder as Nathaniel Nifong and reported that the crane can run for about an hour without supervision. It listed the limits: the diffusion-transformer vision model needs more refinement, the gripper struggles with objects such as books, and the wires can dip, a potential risk to people in the room. Items are dropped into a bin; adults still put them away.

That description sits against the product page's claim that about 50 training episodes can be enough for some models.

Security and setup

The repository README publishes a default SSH password for the Raspberry Pi components and recommends changing it with the provided key-deployment script. It also warns that the cranebot service can drive motors at boot, so it must be stopped before component self-tests, and that every new room needs full calibration. The page puts the calibration at about five minutes and the install at studs or structural columns, with a drill and a step ladder.

Remote control is off by default, and the page says Neufangled does not store the robot information that passes through its servers. The repository's default is local-only operation on port 4245.

The parts are ordinary. Per the page, the bill of materials lists four DM-H6215 actuators, two STS3215 servos, two Raspberry Pi 3A+ boards and one Raspberry Pi Zero 2W, in the same Pi class as the $5 Pico running a 131,000-parameter world model. The software works with LeRobot, and the firmware sits in the same Apache 2.0 family as JetBrains' ThinkRail.

What would change this read

The page does not name a licence for the hardware designs or the firmware beyond the repository's Apache-2.0 file. A shipping count, a failure rate across the claimed 1,000 hours, or an independent payload test would move this from a well-documented kit to a product. Until then, $795 buys a crane, and the household still supplies the computer, the drill and the tidying.