Star Arm 102-FL Follower Arm
Price range: $315.00 through $339.00
A 6+1 DoF arm that follows a leader arm, carrying out recorded trajectories or commands sent from control software — available fully assembled or as a DIY kit.
High-torque RA8 and brushless RX8 servos handle a 500g payload, and the standard end-effector interface takes both rigid and flexible grippers.
Pieper-compliant geometry with three wrist axes meeting at one point supports closed-form inverse kinematics, and it runs on LeRobot, ROS 2, MoveIt 2 and Gazebo. It pairs with the Star Arm 102-HD or 102-LD leader.
Related Products
Power Supply Notice
Overview
6+1 DoF Follower Robot Arm for Task Execution
500g Payload with High-Torque Robot Servos
Pieper-Compliant Design for Inverse Kinematics
ROS 2, MoveIt 2 and Gazebo Support
LeRobot Support for Imitation Learning
Interchangeable Rigid and Flexible Grippers
Assembled or DIY Kit
Media Gallery
Development Ecosystem
LeRobot Ecosystem Integration
ROS 2 Support
Python SDK
Web-Based Control Interface
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-FL DIY kit lets students assemble the execution platform itself, learning how joints and payload limits translate to real motion.
AI Trajectory Collection
Batch-collect high-quality motion data for imitation learning and reinforcement learning — 12-bit encoders deliver clean, jitter-free trajectories. As the follower, the kit records and replays trajectories collected by a leader arm — assembling it clarifies how actuator selection affects accuracy.
Teleoperation Retrofit
Upgrade existing lab robotic arms with a low-cost leader-follower system — no full hardware replacement needed. Add the FL follower kit to an existing leader to build a complete leader-follower system without replacing hardware.
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 works as a workshop activity, with participants assembling the follower before running demos.
Algorithm Prototyping
Single-operator teleoperation for rapid validation of grasping, path planning, and AI robotics algorithms. Validate grasping and sorting algorithms on the FL follower kit before scaling to production setups.
Part List
|
102-FL |
Qty. |
|---|---|
|
3D-printed structural parts (DIY Kit only) |
1 |
|
Servos (DIY Kit only) |
7 |
|
Screws |
1 |
|
Threadlocker |
1 |
|
Woodworking Clamps |
2 |
|
Spare UC-01 PCB |
1 |
|
DC Power Adapter Cable |
1 |
|
200mm Servo Extension Cable |
1 |
|
USB-A to USB-C Cable |
1 |
|
Mouse Pad |
1 |
Specification
|
Item |
Star Arm 102-FL |
|---|---|
|
Reach |
420mm |
|
DOF |
6+1 |
|
Repeatability |
±0.5mm |
|
Working Payload |
500g |
|
Joint Range |
Joint 1: ±110° | Joint 2: 0°~180° | Joint 3: 0°~270° | Joint 4: ±90° | Joint 5: ±65° | Joint 6: ±150° | Gripper: 0~90° |
|
Servos |
RA8-U35H-M × 4 (Joints #1, #4, #7 & Gripper Joint) | RX8-U50H-M × 1 (Joint #2-3) | RA8-U27H-M-C005 × 2 (Joints #5) | RA8-U35H-M-C047 (Joints #6) |
|
Protocol Type |
UART |
|
Communication Hub |
UC-01 |
|
Power Supply |
12V 10A / XT30 |
|
Weight |
791g |
|
Operating Temperature |
0-40℃ |
|
Works with ROS 2 |
✓ |
|
Works with LeRobot |
✓ |
|
Works with MoveIt |
✓ |
|
Works with Gazebo |
✓ |
CAD Drawings
Documents
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 |
| Repeatability | ±0.5mm |
| Working Payload | 500g |
| Joint Range | Joint 1: ±110° | Joint 2: 0°~180° | Joint 3: 0°~270° | Joint 4: ±90° | Joint 5: ±65° | Joint 6: ±150° | Gripper: 0~90° |
| Servos | RA8-U35H-M × 4 (Joints #1, #4, #7 & Gripper Joint) | RX8-U50H-M × 1 (Joint #2-3) | RA8-U27H-M-C005 × 2 (Joints #5) | RA8-U35H-M-C047 (Joints #6) |
| Protocol Type | UART |
| Communication Hub | UC-01 |
| Power Supply | 12V 10A / XT30 |
| Weight | 791g |
| Operating Temperature | 0-40℃ |
| Works with ROS 2 | ✓ |
| Works with Lerobot | ✓ |
| Works with MoveIt | ✓ |
| Works with Gazebo | ✓ |
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
Shipping costs are calculated based on the destination, package weight, dimensions, and selected shipping method. The final shipping cost will be shown at checkout before payment.
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.
