21CM 2DOF Robotic Arm with Gripper (R

OHS Compliant) - Detailed Introduction

1. Product Overview

2. Core Specifications

• Degrees of Freedom (DOF): 2DOF, controlling arm pitching (up and down movement) and gripper opening/closing respectively

• Arm Length: 21cm (total length from base to gripper end), suitable for short-distance grasping and placement

• Servos: 2 pcs high-quality servos (RA001B S06NF STD & RA001C S05NF STD), supporting 180° rotation, PWM signal control (50Hz PWM frequency)

• Gripper: Mechanical linkage gripper, opening width up to 54mm, capable of grasping light-weight objects (load capacity: 50-300g, depending on power supply and installation)

• Material: 3mm thick aluminum alloy, silver metal finish, lightweight (total weight approx. 300g) and corrosion-resistant

• Compliance: Fully compliant with ROHS environmental standards, free of harmful substances such as lead and cadmium, safe for educational use and export

• Power Supply: 6V recommended for servos (compatible with 5-7V DC power supply)

3. Structural Features

4. Compatibility & Control

• Directly compatible with Arduino (Uno, Nano, Mega), Raspberry Pi, and other open-source controllers

• Supports PWM signal direct drive, can be controlled by servo libraries (e.g., Arduino Servo Library) with simple programming

• Standard servo wiring (Brown/Black = GND, Red = VCC, Orange = Signal), easy to connect without complicated wiring

• Supports secondary development: can be paired with sensors (infrared sensor, ultrasonic sensor) to realize obstacle avoidance, positioning grasping, and other advanced functions

5. Package Included

• 1 x 21cm 2DOF metal robotic arm structure (base + arm + gripper)

• 2 x High-performance servos (RA001B + RA001C)

• 1 Set of fixing screws and nuts

• Servo connection wires

• Simple assembly tool (optional)

• Basic user manual (with wiring diagram and simple control guide)

6. Application Scenarios

• STEM Education: Perfect for school robot courses, helping students learn about mechanical structure, servo control, and programming logic

• Maker Projects: Suitable for DIY enthusiasts to build small automated devices, such as automatic sorting machines, small material handling systems

• Robot Entry-level Development: A great starting platform for beginners to learn robotic arm control, programming, and mechanical design

• Teaching Demonstration: Can be used in classrooms or training sessions to demonstrate basic robot movement and grasping principles

• DIY Expansion: Can be mounted on intelligent robot cars or other platforms to expand their functional scope

7. Usage Tips & Notes

• Before assembly, check all components to ensure no damage or missing parts; follow the user manual for correct installation to avoid damaging the servos or mechanical structure.

• When connecting the power supply, ensure the voltage matches the servos (6V recommended) to prevent burnout.

• When programming, calibrate the servo rotation angle to avoid over-rotation, which may damage the arm joints.

• The gripper is designed for lightweight objects; do not grasp heavy objects beyond the load capacity to avoid structural damage.

• ROHS certification ensures environmental friendliness and safety, making it suitable for educational institutions and export markets.

8. After-sales Support