Robotic Arm with Arduino - Save/Play/Export/Import Positions.

Robotic Arm Construction and Components
📌 The project involves building a 3D-printed robotic arm controlled by an Arduino Uno and Servo Motors (MG995 and MG90S).
🔩 3D model files (STEP and STL formats) are available via links in the description for printing and modification.
⚡ Assembly requires soldering wires to a DC jack socket for power input and careful wiring of multiple servo motors to the Arduino's 5V, GND, and digital pins.
🛠️ A critical step is setting all servos to their neutral position (90°) before final assembly to ensure correct movement mapping.

Assembly Process Highlights
⚙️ Components like the base, forearm, and wrist are assembled using M3 screws (12mm and 16mm) and washers, connecting servo motors to control movement axes.
🔗 Cable management is emphasized, requiring cables to be threaded through conduits in the arm components down to the base compartment.
🖐️ The claw mechanism utilizes servo-controlled gears, secured with self-locking nuts, and is connected to the wrist assembly.
🔋 The system is powered using an external 5V 3A adapter connected via the integrated DC jack.

Control Interface and Functionality
🖥️ The arm is controlled via a graphical interface created using Processing, which communicates with the Arduino through serial communication.
🕹️ The interface allows for manual control of the arm using sliders for each joint, port selection for the Arduino connection, and speed control for replays.
💾 Key advanced features include the ability to save specific positions, replay them continuously, and export/import these saved movement sequences.

Key Points & Insights
➡️ All servo motors must be initialized to 90° before physical assembly to guarantee accurate calibration of the arm's movements.
➡️ The control application offers export/import functionality for movement profiles, allowing users to easily share or back up programmed sequences.
➡️ Users can choose between different servo types (MG995/MG90S) as the 3D parts are designed to be compatible with various models.
➡️ External power (5V 3A adapter) is recommended for the servo motors to avoid complications with the circuit powered by the Arduino.

📸 Video summarized with SummaryTube.com on Dec 22, 2025, 14:31 UTC