01 / UPPER BODY
Upper body
Two 7-DOF arms with 14 joint motors, an 840 mm working radius and a 5 kg payload per arm. OmniPicker grippers are standard, with dexterous hands as an option. Head and wrist RGB-D cameras provide vision for manipulation.
Home / Gen3.5 wheeled humanoid robot
LAJIU R&D / WHEELED HUMANOID ROBOT
Gen3.5
Wheeled humanoid robot
A dual-arm wheeled humanoid robot developed by Lajiu. Two 7-DOF arms, a lifting column and a mobile base cover working heights from 0 to 2,088 mm. Teleoperation data collection, VLA model fine-tuning and on-robot deployment are supported for handling, sorting, inspection and embodied-AI development.
- 15degrees of freedom (2 × 7 arms + lift)
- 5 kgpayload per arm
- ±0.05 mmrepeatability
- 0–2088 mmreach height (palm centre)
- 4–6 hbattery runtime
- 275 TOPSon-board compute
ARCHITECTURE
Three main assemblies
Upper body, column and base work together for coverage and working height.
02 / LIFTING COLUMN
Lifting column
A 400 mm stroke at 55–80 mm/s with 1 mm accuracy adjusts the working height to the bench. Overall height ranges from 1,395 mm to 1,795 mm.
03 / MOBILE BASE
Mobile base
Navigation fuses lidar and RGB-D cameras. The base travels at up to 1.2 m/s, passes 63 cm aisles and climbs 10° slopes; the lithium battery supports automatic recharging.
DEMONSTRATIONS
Demonstrations
Research-test footage; people and third-party marks are blurred.
Mobile pick and place
The robot moves to a workbench, picks up items and places them in a tote.
Inspection sorting
Parts are placed into separate colour-coded bins, with the web operator interface alongside.
Handling a soft object
The arms pick up a towel and place it in a container.
APPLICATION REVIEW
Could Gen3.5 handle your task?
Share the objects, workstation layout and cycle requirements, and we will review the end effector, data collection and deployment approach.
Describe your application ↗EMBODIED AI DEVELOPMENT
From data collection to deployment
Gen3.5 provides a complete embodied-AI workflow: collect human demonstrations, fine-tune a VLA model and deploy it back to the robot to follow natural-language instructions.
APPLICATIONS
Teleoperation data collection
An operator wearing a Meta Quest 3 headset teleoperates the arms by hand tracking while video and joint states are recorded.
Data annotation
Demonstrations are segmented, labelled with task instructions and converted between coordinate frames to form a training set.
VLA model fine-tuning
The NVIDIA GR00T N1.7 foundation model is fine-tuned on a GPU server so the robot carries out pick-and-place tasks from natural-language instructions.
On-robot deployment
Inference runs on a server or the on-board Jetson AGX Orin, with commands sent over ROS 2. A browser-based HMI monitors status, controls the base and column and manages tasks.
SAFETY
Safety features
- A rear emergency stop cuts power to the whole robot; the remote control includes a wireless emergency stop.
- 360° lidar and RGB-D cameras detect and avoid obstacles.
- Below 15% charge the robot returns to its charger; below 10% it powers down to protect the battery.
- Status lights on the lower back show power and run state.
- For indoor use (IP40). Keep at least 2 m from the robot during commissioning.
SPECIFICATIONS
Technical specifications
Values from the Lajiu Gen3.5 parameter sheet.
| Packed size (W × D × H) | 540 × 490 × 1,440 mm |
|---|---|
| Overall size · column raised | 540 × 490 × 1,795 mm |
| Overall size · column lowered | 540 × 490 × 1,395 mm |
| Total degrees of freedom | 15 (2 × 7-DOF arms + 1 lift; dexterous hands not counted) |
| Weight | 98 kg |
| Arm reach height | 0–2,088 mm (palm centre) |
| Degrees of freedom | 7 |
|---|---|
| Working radius | 840 mm |
| Payload | 5 kg |
| Repeatability | ±0.05 mm |
| Waist degrees of freedom | 1 |
|---|---|
| Column stroke | 400 mm |
| Lift speed | 55–80 mm/s |
| Column accuracy | 1 mm |
| Travel speed | 1.2 m/s |
|---|---|
| Drive | Omnidirectional two-wheel differential |
| Minimum aisle width | 63 cm |
| Slope | 10° |
| Gap / step | Gap ≤ 6 cm, step ≤ 2 cm |
| Compute module | Jetson AGX Orin 64 GB, 275 TOPS |
|---|
| Vision | RGB-D cameras: head ×1, chest ×2, wrists ×2 |
|---|---|
| Lidar | 360° horizontal, 0.22–40 m |
| Force sensing | Joint torque sensors (optional) |
| Configuration | OmniPicker (standard); dexterous hands (optional) |
|---|
| Type | NMC lithium, automatic recharging |
|---|---|
| Capacity | 30 Ah |
| Output voltage | 48 V |
| Runtime | 4–6 h |
| VLA, teleoperation, training environment | Supported |
|---|
| Warranty | 1 year (terms per contract) |
|---|---|
| Technical support | Provided by Lajiu |
Specifications: Lajiu Gen3.5 parameter sheet (October 2026). The product is under continuous development; the final configuration and specifications are those in the technical agreement issued with the quotation. Demonstration clips were filmed in research-test settings with people and third-party marks blurred; they illustrate functions and do not represent cycle times or success rates for a specific project.
FAQ
Common questions
What payload and repeatability does Gen3.5 offer?
Each arm carries 5 kg with ±0.05 mm repeatability and an 840 mm working radius. The payload includes the end effector and the part, so optional tooling is checked against its actual mass.
How long does the battery last and how is it charged?
Runtime is 4–6 hours from a 30 Ah, 48 V NMC lithium battery. Below 15% charge the robot returns to its charger automatically; recharging can also be triggered from the HMI or remote control.
Can we develop and train our own tasks?
Yes. The robot supports teleoperation data collection, a VLA training environment and ROS 2 interfaces, so models can be fine-tuned on your own task data and deployed to the robot. Development documentation and training scope are agreed per project.
Which end effectors are available?
OmniPicker grippers are standard and dexterous hands are optional. For other tooling, share the part, grasp method and mass so the interface and payload can be reviewed.
Do you deliver overseas, and how are price and lead time confirmed?
Enquiries from customers worldwide are welcome. Share the application, objects to handle, end-effector configuration, quantity and destination; price, lead time, shipping and service are confirmed in the quotation.
ENQUIRE / GEN3.5
Discuss Gen3.5 configuration and delivery
Describe the application, the objects to handle (size and mass), site conditions, end-effector configuration (gripper or dexterous hands), quantity and destination, and whether you need data-collection and model-training support.