Star Arm 102-LD DIY Kit
$159.00
In stockLeader arm · requires assembly · 6+1 DoF · 420mm reach · 12-bit encoders
Power Supply Notice
Overview
Lightweight Design for Hands-On Assembly
The kit includes 11 3D-printed structural parts and 7 joint servos for one complete 6+1 DoF leader arm. The finished arm weighs 721g. Assembly is a moderate, hands-on build; allow approximately 1–2 hours when following the illustrated guide.
12-Bit Encoders After the Build
When the build is complete, the kit delivers the same leader-arm performance as the Star Arm 102-LD: 12-bit magnetic encoders (0.088° resolution) across all 7 joints and a 420mm reach. The completed arm captures precise hand and wrist movements for the same teleoperation and imitation-learning workflows.
Broad Compatibility After the Build
After the build, the leader arm can drive the Star Arm 102-FL and compatible third-party follower arms (e.g., reBot B601-DM and Xinghai Tu). The completed kit supports the same multi-platform teleoperation workflows, letting one leader arm control multiple execution platforms.
Complete Tools for the Build
The box includes threadlocker, woodworking clamps, and the required screw kit for the build. Follow the illustrated assembly guide step by step to complete the arm.
After the Build: Calibration
Before powering on, align each Star Arm 102-LD joint to its zero-position mark by hand.
Open the Web-Based Control Interface and run one-click zero-point calibration.
Jog each joint in small increments to verify direction and range limits before teleoperation or demos.
Media Gallery
Development Ecosystem
LeRobot Ecosystem Integration
ROS 2 Support
Python SDK
Developer-friendly SDK. Install via pip and start master-slave teleoperation using the documented examples.
Web-Based Control Interface
Zero-code, browser-based control. Supports real-time teleoperation, joint angle monitoring, one-click zero-point calibration, and PID parameter tuning without code changes, making the interface approachable for beginners.
Applications
Classroom Robotics
Hands-on robotic arm demos for university courses — students learn kinematics, control theory, and motion planning with real hardware. The Star Arm 102-LD DIY kit turns assembly into a hands-on teaching module — students build the leader arm from parts before running kinematics and control labs.
AI Trajectory Collection
Batch-collect high-quality motion data for imitation learning and reinforcement learning — 12-bit encoders deliver clean, jitter-free trajectories. Assembling and calibrating the kit lets students understand encoder zero-positions and joint mapping firsthand, so collected trajectories are cleaner and easier to debug.
Teleoperation Retrofit
Upgrade existing lab robotic arms with a low-cost leader-follower system — no full hardware replacement needed. Starting from the kit keeps retrofit costs low — build the leader arm first, then pair it with an existing follower platform.
Maker & STEM Demos
Interactive robot demos for maker spaces, science fairs, and public outreach — engaging, safe, and easy to set up. The from-parts build itself works as a workshop activity, with students assembling the arm before the demo.
Algorithm Prototyping
Single-operator teleoperation for rapid validation of grasping, path planning, and AI robotics algorithms. Budget-limited labs can start with the kit and add an assembled unit later if throughput demands it.
Part List
All mechanical parts, servos, fasteners, and tools required for assembly are included—no extra purchase is needed.
|
102-LD |
Qty. |
|---|---|
|
3D-printed structural parts |
1 |
|
Servos |
7 |
|
Screws |
1 |
|
Threadlocker |
1 |
|
Woodworking Clamps |
2 |
|
Spare UC-01 PCB |
1 |
|
XT30 Power Adapter Cable |
1 |
|
200mm Servo Extension Cable |
1 |
|
USB-A to USB-C Cable |
1 |
|
Mouse Pad |
1 |
|
Base Plate |
1 |
Specification
|
Item |
Star Arm 102-LD (DIY Kit) |
|---|---|
|
Reach |
420mm |
|
DOF |
6+1 |
|
Joint Range |
Joint 1: ±110° | Joint 2: 0°~180° | Joint 3: 0°~270° | Joint 4: ±90° | Joint 5: ±65° | Joint 6: ±150° | Controller: 0~90° |
|
Servos |
RA8-U01H-M × 4 (Joints #1-#4) | RA8-U02H-M × 1 (Joint #5) | RA8-U03H-M × 2 (Joint #6 & Wrist Joint) |
|
Protocol Type |
UART |
|
Communication Hub |
UC-01 |
|
Power Supply |
12V 3A / DC5521 |
|
Weight |
721g |
|
Operating Temperature |
0-40℃ |
|
Works with ROS 2 |
✓ |
|
Works with Lerobot |
✓ |
CAD Drawings
Documents
- Star Arm 102 Github
- STEP
- Assembly Guide
- Star Arm 102 ROS 2 class=”doc_item”>Datasheetli class=”d
Certification
|
HS Code |
9023009000 |
|
ECCN Code |
EAR99 |
|
Country of Origin |
China |
|
Certifications |
CE, FCC, RoHS |
| Product Series | Star Arm 102 |
|---|---|
| Reach | 420mm |
| DOF | 6+1 |
| Joint Range | Joint 1: ±110° | Joint 2: 0°~180° | Joint 3: 0°~270° | Joint 4: ±90° | Joint 5: ±65° | Joint 6: ±150° | Controller: 0~90° |
| Servos | RA8-U01H-M × 4 (Joints #1-#4) | RA8-U02H-M × 1 (Joint #5) | RA8-U03H-M × 2 (Joint #6 & Wrist Joint) |
| Protocol Type | UART |
| Communication Hub | UC-01 |
| Power Supply | 12V 3A / DC5521 |
| Weight | 721g |
| Operating Temperature | 0-40℃ |
| Works with ROS 2 | ✓ |
| Works with Lerobot | ✓ |
Shipping & Delivery
We ship orders to customers worldwide. Most orders are dispatched via DHL Express to provide fast, reliable international delivery with end-to-end tracking.
Processing Time
In-stock items are usually processed within 1–3 business days after payment is confirmed.
Shipping Method
Our default international shipping method is DHL Express. Other trusted express or air services may be used when appropriate.
Estimated Delivery Time
DHL Express delivery typically takes 3–7 business days after dispatch for most international destinations.
Shipping Cost
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For large-volume or special shipments, please contact us for a shipping quotation.
Customs Duties & Import Taxes
International orders may be subject to customs duties, import taxes, VAT/GST, brokerage fees, or other charges required by the destination country/region.
These charges are not included in the product price or shipping cost unless specifically stated. Customers are responsible for any applicable import duties, taxes, and customs-related fees. Please check with your local customs office before placing an order.
Order Tracking
Once your order has been shipped, we will provide a tracking number by email or through your account order details. Tracking information may take up to 24 hours to update after the shipment is collected by the carrier.
Delays & Special Situations
Delivery may be delayed due to public holidays, customs inspections, weather conditions, carrier disruptions, force majeure events, or other circumstances beyond our control.
