# Built as nodes. Measured like instruments.

Source: https://checkmatedynamics.com/

Robotics hardware — Dallas, Texas | Catalog rev. 2026.10

Motor, sensing and sync nodes on one USB-C bus. Makers use them one at a time, robotics companies build them in, and our data-station hardware is assembled from them.

[View the index](https://checkmatedynamics.com/products.html) | [Book a call](mailto:contact@checkmatedynamics.com?subject=Data%20station%20call)

**A1.3** SmartStepper 17 · 25:1

**A2.3** G-2804 · 20:1

**A2.5** G-5208 · 25:1

**D1** Hub 8 Pro

Fig. 01 — Three motor nodes and the hub, as listed below. Concept renders.

**01** Index

## Everything we make, in one list.

Prices are planned list prices. Nothing is on sale yet; registered interest decides what ships first.

| No. | Product | For | Description | USD |
|---|---|---|---|---|
| A1.1 | SmartStepper 17 Board | Makers · OEM | Closed-loop controller for your own NEMA 17 | 79 planned |
| A1.2 | SmartStepper 17 · Direct | Makers · OEM | Direct drive on a calibrated NEMA 17, housed | 169 planned |
| A1.3 | SmartStepper 17 · 25:1 | Makers · OEM | Metal cycloidal reducer and output encoder | 279 planned |
| A2.1 | SmartServo G Board | Makers · OEM | FOC servo board for 2804 and 5208 gimbal motors | 89 planned |
| A2.2 | G-2804 · Direct | Makers · OEM | Direct drive, no gearbox, no backlash | 159 planned |
| A2.3 | G-2804 · 20:1 | All | Cycloidal, output encoder, I/O tile | 249 planned |
| A2.4 | G-5208 · Direct | Makers · OEM | Direct drive, larger motor, for haptics and test benches | 249 planned |
| A2.5 | G-5208 · 25:1 | All | Cycloidal, output encoder, I/O tile | 399 planned |
| B1 | Contour | Makers · OEM | Time-of-flight depth over USB-C | Register interest |
| B2 | Contour Wrist | Stations | Depth at the gripper, on the station clock | In Sync Kit |
| B3 | Output encoder | Makers · OEM | Reads a reducer’s output angle directly | 29 planned |
| C1 | Sync Beacon · Sync Kit | Stations · OEM | Station timing instrument and per-episode report. Patent pending | From 1,490 planned / station |
| D1 | Hub 8 Pro | Stations · OEM | Eight node ports, per-port power and CAN, e-stop | 399 planned |
| D2 | Bus cable | All | Power, USB and CAN on one USB-C cable | In the box |
| D3 | I/O tile | Makers · OEM | Qwiic and AUX ports for SmartServo G | 19 planned |
| D4 | Cable Clip | All | Anodized 6061 clamp that holds the USB-C cable in its port | 9 or in the box |
| E1 | Checkmate Leader | Stations | Motorized leader arm made of SmartServo G nodes | 2,990 planned / arm |
| E2 | Station commissioning | Stations | New rigs measured and signed off in sync | On call |

**02** Three ways in

## The same parts, sold three ways.

01 Makers, students, labs

### Build your own robot

Complete motor nodes that set up in a browser and script from Python. Planned prices. Register your interest.

Register interest

02 Robot data floors

### Run better stations

Sync QA on every episode, a motorized leader arm, commissioning and service plans.

Book a call

03 Robotics companies

### Build us into yours

Nodes, hub, depth and sync modules supplied with per‑unit test records and engineering support.

Talk to us

**03** System

## One cable per device.

Each node’s own USB-C port is the bus: power negotiated over PD, USB to a computer, and CAN to everything else. On a bench, a phone charger runs one node. On a floor, a Hub 8 Pro runs eight.

|  |  |  |  |  |
|---|---|---|---|---|
| A1 | SmartStepper 17 |  | USB-C, PD + USB + CAN 1 Mbit/s |  |
| A2 | SmartServo G × n |  | USB-C, CAN-FD |  |
| B1 | Contour |  | USB-C, depth and sync in |  |
| C1 | Sync Beacon |  | USB-C, station clock |  |
| D1 | Hub 8 Pro |  | 8 node ports with PD per port, 2 accessory ports, CAN star with isolated ports, 20 V motor rail, E-stop in |  |
| PC | Host PC |  | One USB device. Python SDK, ROS 2, LeRobot, MCAP |  |

Fig. 02 — Bus topology. Hub 8 Pro ports are point-to-point segments, so a damaged cable is cut off without stopping the others.

**04** Test card

## Every unit ships with its own numbers.

Each node is calibrated and measured at final test, and the results go in the box and stay on the node. We publish measured values. Anything we haven’t measured yet is marked as a target.

- Encoder calibration stored on the node, not in a laptop’s config file
- Backlash, backdrive and torque recorded per serial number
- The same record goes to makers, OEM customers and our own stations

**Unit test card** SmartServo G-2804 · 20:1

Illustrative

Serial | CM-A23-000127

Encoder calibration | 16,384 counts/turn | at test

Backlash, output | 4.6 arcmin | at test

Backdrive, unpowered | 0.21 N·m | at test

Continuous torque, 20 V | 0.93 N·m | at test

Thermal soak, 30 min | 41 °C | at test

PD contract | 20 V | at test

Illustrative values. Each unit’s real values are measured at final test. | Dallas, TX

**05** Assembled

## Our station hardware is made of this catalog.

A floor’s spare part is a node from the index above, and a repair is a swap. Each system below is a list of catalog numbers plus a little structure.

*D1 · Hub 8 Pro* *A2.5 · G-5208 · 25:1* *A2.3 · G-2804 · 20:1*

**Fig. 03** Eight nodes on one Hub 8 Pro. No arm: the catalog parts only Concept render

E1 Checkmate Leader

[A2.2 · A2.3 · A2.5 nodes](https://checkmatedynamics.com/smartservo-g.html) | [D1 Hub 8 Pro](https://checkmatedynamics.com/hub-8.html) | links, base, handle

C1 Sync Kit

[C1 Sync Beacon](https://checkmatedynamics.com/sync-kit.html) | [B2 Contour Wrist](https://checkmatedynamics.com/contour.html#wrist) | the same bus

[Checkmate Leader](https://checkmatedynamics.com/leader.html) | [Sync Kit](https://checkmatedynamics.com/sync-kit.html)

## Nothing ships yet. Tell us what you’re building.

Makers register interest. Data floors book a call. Robotics companies talk to engineering.

[Register interest](mailto:contact@checkmatedynamics.com?subject=Register%20interest) | [Book a call](mailto:contact@checkmatedynamics.com?subject=Data%20station%20call)