Open Source RoboticsRobots, software & learning

Bipedal Wheel Robot (eorua8801)

Robot / hardware build

A self-balancing wheel-biped hardware reference with aluminum profiles and released assembly CAD; controls, complete costs and exact reuse terms remain unresolved. [1] [2] [3] [4]

Build & first use →Official websiteUpstream build guideBill of materials

For
Experienced builders able to develop or integrate a separate balancing controller [2] [4]
Cost
No current cost yet. Upstream bill of materials [2]
Source rights
Some licenses are unresolved. Review licenses
Unknowns
host computer, operating system not fully established. Review gaps

Source researched · Not tested by us
Sources checked · Research details

Licenses & related hardware
License
not fully assessed for mechanical design, documentation · Details by part

Requirements · Research details and dates

On this page

Overview

This wheel-biped release is useful for inspecting an aluminum-profile mechanism and its printable interfaces. It supplies assembly CAD and a component list, but no balancing controller or commissioning procedure was found in the reviewed hardware repository. The catalog scope is a source-available mechanical design reference, with electrical integration and reuse terms still to resolve. [1] [2] [3] [4]

Is this for you?

Use cases
  • Mechanical design study
  • Wheel-biped frame prototyping

Editorial assessment from inspected sources.

[1] [3] · Editorial assessment

Known limitations
  • No balancing firmware, control software, wiring or commissioning procedure found in the reviewed hardware repository.
  • README names CERN OHL v2 but the linked LICENSE file and precise variant are absent; no comprehensive reuse permission inferred.
  • BOM leaves shaft details and tire quantities incomplete; no matched delivered cost is established.
  • CAD was inspected as file/container/mesh data; fit, strength and physical balance were not tested.

Editorial assessment from inspected sources.

[1] [2] [3] [4] · Editorial assessment

What you need

Tools
  • FDM printing
  • Aluminum-profile cutting/tapping
  • Mechanical assembly tools

Editorial assessment from inspected sources.

[1] [2] · Editorial assessment

Skills
  • CAD interpretation
  • Fabrication and mechanical assembly
  • Independent control and electrical integration

Editorial assessment from inspected sources.

[2] [3] [4] · Editorial assessment

Hardware & parts

Upstream bill of materials [2]

Hardware configuration

Bilaterally symmetric wheel-biped frame combining aluminum extrusion and printed parts.

[1] [2]

Actuators
  • BOM lists four Robstride O4 motors; a complete actuator/control configuration is not established.

[1] [2]

Assembly & first use

Open the upstream getting-started guide [1]

  • Download V1.0 CAD.zip; repository CAD folders are placeholders.
  • Inspect the assembly and match print quantities and profile lengths to the BOM.
  • Resolve shaft, wheel, motor, power and controller choices before fabricating or actuating a build.

Editorial assessment from inspected sources.

[1] [2] [3] · Editorial assessment

Assembly

V1.0 supplies full/base assembly and component models; a verified electrical or commissioning route is not supplied.

Editorial assessment from inspected sources.

[1] [2] [3] [4] · Editorial assessment

Cost

No current, complete configuration-specific build cost has been established for this profile.

3D preview

Preview not available yet. Mechanical source files are available, but reuse scope remains unresolved. No model or photograph is hosted by this addition; mechanical fit and complete build reproduction have not been validated.

Model sources

Mechanical source files are available, but reuse scope remains unresolved. No model or photograph is hosted by this addition; mechanical fit and complete build reproduction have not been validated.

Project notes

Download the release, not the placeholder directories

The repository review pins b7affa3e477b06f8eb8d4f37790f9876395285a2. Its CAD folders describe the intended structure; the actual payload is the V1.0 release's CAD.zip, published March 12, 2026. The inspected archive contains F3D, STEP, STL and 3MF files, including full/base assemblies, a battery/cage assembly and printable components. These are real design payloads rather than empty folders or LFS pointers. Container, STEP-entity and mesh checks do not establish fit, strength or successful assembly. [1] [3] [4] [5]

The frame uses 2020 aluminum extrusion, with upper/lower members and a separate protective cage. The README calls for bilaterally symmetric FDM parts in PLA. Its print table specifies quantities per leg, so those numbers should not be mistaken for quantities for the entire robot. Foamex panels and PCB standoffs form the wiring-board arrangement. [1] [2]

The BOM is a starting point

The required motor list names four Robstride O4 units. Some shaft details remain unspecified and the tire row has no quantity; the list does not establish a complete wheel-drive, controller or sensor configuration. Optional LiDAR and camera references are choices to investigate, rather than evidence of released perception or navigation software. [1] [2]

A bounded next step is to inspect the full assembly against the profile lengths, print quantities and purchased-part interfaces, then resolve the missing electrical and control choices. No balancing firmware, custom schematic/PCB source or control implementation was found in the pinned hardware repository. A builder would need to establish those separately before powered commissioning. [2] [3] [4]

No complete delivered budget is established. The listed components have not been reconciled with fabrication, electronics, battery/charger, tools, tax or shipping for a working configuration. [2]

What we checked

Source research only; no fabrication, EDA import, firmware/controller compilation, environment installation, policy inference/training, numerical benchmark or physical robot testing. No affiliate links. No upstream media or CAD redistributed.

Not yet established

  • Requirements: operating system, host computer

Updates

Upstream last updated
Not established
Latest release
Mar 12, 2026 [5]
Profile updated
Oct 25, 2026
Sources last checked
Oct 25, 2026
Next review
Nov 25, 2026
Reviewed revision
b7affa3

Source files and licenses

Include narrowly as a mechanical design reference: actual assembly CAD and part payloads plus a BOM support inspection and adaptation. No complete robot reproduction claim. Distinct extrusion-based hardware release, with no identity match among existing records. CERN OHL v2 is named but variant/text and control artifacts remain unresolved.

LayerAvailability / license
mechanical designavailable · License not fully assessed
F3D, STEP, STL and 3MF source payloads inspected; CERN OHL version/variant unresolved. [3]
electronicsnot found · License not fully assessed
No custom schematic or PCB release found; electrical integration remains separate. [4]
firmwarenot found · License not fully assessed
No balancing firmware found in this hardware release. [4]
softwarenot found · License not fully assessed
No control implementation found in this hardware release. [4]
documentationavailable · License not fully assessed
README/BOM available; linked project LICENSE absent. [1]

Outside this entry’s scoped hardware/design or simulation contribution.

License declaration needs clarification

The README names CERN Open Hardware Licence v2 and links to LICENSE, but that file is absent from the pinned tree and the CAD archive contains no license file. The precise CERN OHL variant and applicable text are therefore unresolved. This profile describes the accessible design without asserting a comprehensive reuse grant or redistributing its CAD. No parts were fabricated and no physical balancing test was performed. [1] [3] [4]

References

Each source links to the exact revision we read. “Used for” shows where this page relies on it.

Correction guidance · Discussion is not enabled · Profile format 0.7.0-draft.5

Change history