StarAI Arm (Viola) - Image 1
StarAI Arm (Viola) - Image 2
StarAI Arm (Viola) - Image 3
StarAI Arm (Viola) - Image 4
StarAI Arm (Viola) - Image 5
StarAI Arm (Viola) - Image 6
StarAI Arm (Viola) - Image 7
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StarAI Arm (Viola)
StarAI Arm (Viola) - Image 2
StarAI Arm (Viola) - Image 3
StarAI Arm (Viola) - Image 4
StarAI Arm (Viola) - Image 5
StarAI Arm (Viola) - Image 6
StarAI Arm (Viola) - Image 7

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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

    470mm
    DOF

    6+1
    Repeatability

    1mm
    Accuracy

    5-8mm
    Working Payload

    300g
    Joint Range

    Joint 0: ±123° Joint 1: 0°~180° Joint 2: 0°~187° Joint 3: -65°~100° Joint 4: -65°~100° Joint 5: ±147°
    Servos

    RX8-U50H-M x2 RA8-U25H-M x4 RA8-U26H-M x1
    Communication Hub

    UC-01
    Power Supply

    12V10A/120w XT30
    Tools and Bolts

    All Included
    Weight

    1.10kg
    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 (Viola)

    $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.

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    SKU: 02.09.00000011 Category: