System Integration

Assignment:

• Design and document the system integration for your final project

#.Assignment:

System Integration Documentation: Linear Autofeeder Project

For my final project, I set out to design and document the system integration of a Linear Autofeeder. The goal was to create a feeder that moves along a rail, stops at intervals to dispense food, and continues its path, repeating the process automatically based on user input.

1. MY Approach

I broke the project down into three main parts to simplify development and ensure successful integration:

• Electronics: Power and control the system with necessary sensors and actuators.
• Mechanical: Provide structure, movement capability, and a reliable feeding mechanism.
• Programming: Orchestrate the system logic control motion, feeding cycles, and user interaction.

Project Goals

• Build a reliable system that moves accurately along a rail.
• Add a controlled food dispensing mechanism using an auger.
• Include a simple interface (rotary encoder + LCD) for manual adjustments.
• Ensure smooth communication between all components.

2. System Overview

The system is divided into three main parts:

1. Electronics
• Microcontroller (XIAO ESP32C3): The brain of the system, handling all decisions and communication.
• Stepper Motors (NEMA 17):
• Motor 1: Moves the feeder along the rail.
• Motor 2: Turns the auger to dispense food.
• Motor Drivers (TB6600): Help the microcontroller control the motors with precision.
• Sensors & Interfaces:
• Limit Switch: Stops the system at the end of the rail.
• Rotary Encoder: Lets users change settings easily.
• 20×4 LCD Display: Shows status and settings.
• Power Regulation:
• AMS1117 Regulators: Keep voltages stable and safe for components.
2. Mechanical Components
• Rail & Carriage:
• Aluminum Rail: Provides a stable path for movement.
• 3D-Printed Carriage: Carries the feeder mechanism.
• Feeding Mechanism:
• Hopper: Holds the food before it's dispensed.
• Auger (3D-Printed): Rotates to release food in measured portions.
• Enclosure: Keeps everything protected and organized.
3. Firmware (Software)
• Motor Movement:
• Tracks steps for precise motion.
• User Interface:
• Rotary encoder input is handled using interrupts for a fast response.
• A menu appears on the LCD for setting feed intervals and speed.
• Safety Features:
• Software endstops to avoid going past the track.
• Emergency stop using the encoder button.

3. Designs of the project

A. Electronics

B. Mechanical Components

C. Firmware (Software)