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Overview

Power Supply Notice

Due to regional differences, the power adapter is not included as a standard accessory. If your local customs restrict power supplies, we recommend purchasing a compatible adapter locally. You can also select and purchase a power supply directly from our store.

Brushless Servos

Equipped with 50kg and 100kg brushless servos for higher torque, higher precision, and greater reliability.

No Calibration, No Tuning

Preconfigured at the factory—no calibration and no servo parameter tuning required. Just unbox, plug in, and start manipulating right away.

One-Button Hover Hold

The Leader Arm (Violin) handle includes a dedicated button. Press it to instantly hold the arm at any position. Great for quick pauses, fine adjustments, and capturing key moments during demonstrations.

Parallel Gripper (Replaceable Fingertips)

Parallel gripper with a 65 mm opening and a linear rail design for smooth, precise motion. Open-source, 3D-printable fingertips allow for easy customization of the grip for various objects.

All-Metal Frame & Integrated Base

Full-metal construction with bearings at key joints for higher load capacity and rigid, repeatable positioning. The integrated base and aluminum-alloy bracket keep the arm firmly supported under load.

Specification

 Item

Cello

Violin

Reach
670mm
470mm 
DOF
6+1
6+1
Repeatability
1mm
-
Accuracy
5-8mm
-
Working Payload
750g
-
Joint Range
Joint 0 : ±180°
Joint 1 : 0°~200°
Joint 2 : 0°~180°
Joint 3 : -60°~115°
Joint 4 : -65°~100°
Joint 5 : ±147°
Grripper : 0~70mm
Joint 0 : ±180°
Joint 1 : 0°~200°
Joint 2 : 0°~180°
Joint 3 : -60°~115°
Joint 4 : -65°~100°
Joint 5 : ±147°
Grripper : 0~70mm
Servos
RX18-U100H-M x 3
RX8-U50H-M x 3
RX8-U51H-M x 1
RX8-U50H-M x 2
RA8-U25H-M x 4
RA8-U26H-M x 1
Communication Hub
UC-01
UC-01
Power Supply
12V25A/300w XT60
12V10A/120w XT30
Tools and Bolts
All Included
All Included
Weight
3.15kg
1.10kg
Parallel Gripper Kit
Interbotix
Works with ROS 1/2
Works with MoveIt
Works with Gazebo
Works with Python-ROS

ROS 2

Allows setting the current position as the origin (0°) in free mode, enabling easy zero calibration and providing a reference start for subsequent motions.

MoveIt Motion Planning

Plan safe, collision-aware trajectories and execute complex manipulation moves with ease.

Intuitive Control GUI

A streamlined interface for fast setup, real-time monitoring, and efficient everyday operation.

Drag-to-Teach Demonstration

Teach motions by hand and record precise, repeatable trajectories reliably in just seconds.

Gazebo Simulation Ready

Test, iterate, and validate complete workflows in realistic, physics-based simulation environments.

Lerobot

  • Fully compatible with Hugging Face LeRobot, aligned with the latest PyTorch tooling
  • All integration code is open-source
  • Complete unbox → teleop → record → dataset → train workflow documentation
  • Supports LeRobotDataset (v3) and optional Hugging Face Hub dataset versioning/sharing
  • Start training with just one personal computer, no extra infrastructure required

Isaac Sim

  • Provides USD assets for robotic arms in Isaac Sim
  • Supports the Isaac Sim simulation platform
  • Supports ROS 2 communication between physical hardware and Isaac Sim simulation
  • Supports teleoperation between physical hardware and Isaac Sim

CAD Drawings

Documents

Certification

HS Code

9023009000

ECCN Code

EAR99

Country of Origin

China

Certifications

CE, FCC, RoHS

Part List

Cello

Violin

Robotic Arm Main Body × 1

Robotic Arm Main Body × 1

Robotic Arm Gripper × 1

Robotic Arm Handle × 1

Packaging Box × 1

Packaging Box × 1

Robotic Arm Screw Kit × 1

Robotic Arm Screw Kit × 1

F Fixture × 2

C Fixture × 1

Color Blocks × 1

UC-01 Debug Adapter Board × 1

Reach

670mm

DOF

6+1

Repeatability

1mm

Accuracy

5-8mm

Working Payload

750g

Joint Range

Joint 0 : ±180° Joint 1 : 0°~200° Joint 2 : 0°~180° Joint 3 : -60°~115° Joint 4 : -65°~100° Joint 5 : ±147° Grripper : 0~70mm

Servos

RX18-U100H-M x3 RX8-U50H-M x3 RX8-U51H-M x1

Communication Hub

UC-01

Power Supply

12V25A/300w XT60

Tools and Bolts

All Included

Weight

3.15kg

Parallel Gripper Kit

Yes

Interbotix

Yes

Works with ROS 1/2

Yes

Works with MoveIt

Yes

Works with Gazebo

Yes

Works with Python-ROS

Yes

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StarAI Arm (Cello)-test

$900.00

StarAI Arm Cello-Violin is a factory-ready 6+1 DOF precision arm for modern embodied AI research. Seamless ROS 2 / MoveIt / Gazebo integration, with Hugging Face LeRobot support for streamlined dataset and training workflows.

SKU: 02.09.00000017-1 Category: