https://github.com/saeed-dev2/stepper_controller

A project to control a stepper motor using a rotary encoder for parameter adjustments and an I2C LCD for real-time display. Features include customizable degrees, RPM, dead time, and direction, with support for interrupt-based emergency stops and motor enable/disable functionality
https://github.com/saeed-dev2/stepper_controller

Last synced: 9 months ago
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A project to control a stepper motor using a rotary encoder for parameter adjustments and an I2C LCD for real-time display. Features include customizable degrees, RPM, dead time, and direction, with support for interrupt-based emergency stops and motor enable/disable functionality

• Host: GitHub
• URL: https://github.com/saeed-dev2/stepper_controller
• Owner: Saeed-dev2
• Created: 2024-11-20T15:53:09.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-11-20T16:24:22.000Z (over 1 year ago)
• Last Synced: 2025-04-04T05:40:10.044Z (11 months ago)
• Language: C++
• Size: 336 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# **Stepper Motor Control with Rotary Encoder and LCD Display**

This project demonstrates how to control a stepper motor using a rotary encoder for input and an I2C LCD for parameter display. It allows users to adjust degrees of rotation, RPM, dead time (DT), and direction, making it a flexible system for stepper motor applications.

## **Features**

- **User Input via Rotary Encoder:**

  - Adjust motor parameters: Degrees, RPM, Dead Time, and Direction.

  - Push button to switch between adjustable parameters.

- **LCD Display:**

  - Real-time display of motor parameters (`DEG`, `RPM`, `DT`, and Direction).

- **Stepper Motor Control:**

  - Move the motor forward and backward based on user-defined parameters.

  - Implements dead time delay between directional changes.

- **Interrupt for Emergency Stop:**

  - Allows the motor to stop immediately via an interrupt.

## **Hardware Requirements**

- Arduino (e.g., Uno, Mega, or Nano)

- Stepper Motor and Driver (e.g., A4988, DRV8825)

- Rotary Encoder (with push button)

- I2C LCD Display (16x2 or similar)

- Push Buttons (for `START`, `SWEN`)

- LEDs (for indicating motor/system states)

- Power Supply suitable for stepper motor driver

### **Pin Connections**

| Component            | Arduino Pin | Description                     |

|----------------------|-------------|---------------------------------|

| Rotary Encoder SW    | `2`         | Rotary encoder push button      |

| Rotary Encoder DT    | `4`         | Rotary encoder DT signal        |

| Rotary Encoder CLK   | `5`         | Rotary encoder CLK signal       |

| Stepper Driver PUL   | `6`         | Pulse signal for stepper driver |

| Stepper Driver DIR   | `7`         | Direction control               |

| Stepper Driver EN    | `8`         | Enable stepper motor driver     |

| LED (Motor Start)    | `9`         | Indicates motor is running      |

| LED (Motor Enabled)  | `13`        | Indicates motor driver enabled  |

| START Button         | `10`        | Starts the motor sequence       |

| SWEN Button          | `12`        | Enables/disables motor driver   |

| LCD SDA              | `A4`        | I2C SDA connection              |

| LCD SCL              | `A5`        | I2C SCL connection              |

## **Software Setup**

### **Libraries Required**

1. **Wire**: For I2C communication.

   - Preinstalled with Arduino IDE.

2. **LiquidCrystal_I2C**: For interfacing with the I2C LCD.

   - Install from Arduino Library Manager.

### **Code Configuration**

1. Download the code from this repository.

2. Adjust the `min` and `max` constraints for parameters (`minR`, `maxR`, etc.) as needed.

3. Upload the code to your Arduino board using the Arduino IDE.

## **How It Works**

1. **Initialization:**

   - Displays default values for parameters on the LCD.

   - System waits for the `START` button to be pressed.

2. **Setting Parameters:**

   - Use the rotary encoder to adjust:

     - Degrees (`DEG`) - Motor rotation.

     - RPM (`RPM`) - Speed of the motor.

     - Dead Time (`DT`) - Delay between directional changes.

     - Direction (`CW`/`CCW`).

3. **Starting the Motor:**

   - Press the `START` button to run the motor with current settings.

   - The motor rotates forward and backward for the specified degrees and speed.

4. **Stopping the Motor:**

   - Press the `SWEN` button to disable the motor driver.

   - An interrupt can also stop the motor immediately.

## **Usage**

### **Rotary Encoder Functionality**

- **Rotate Clockwise:** Increase the selected parameter.

- **Rotate Counterclockwise:** Decrease the selected parameter.

- **Press Encoder Button:** Switch between parameters (`DEG`, `RPM`, `DT`, `Direction`).

### **LCD Display**

| Parameter  | Description                  |

|------------|------------------------------|

| `DEG`      | Degrees of rotation          |

| `RPM`      | Rotational speed (RPM)       |

| `DT`       | Dead time (in seconds)       |

| `CW/CCW`   | Clockwise/Counterclockwise direction |

## **Future Improvements**

- **Debounce Logic:** Add software debounce for better rotary encoder performance.

- **Interrupt Handling:** Refactor ISR for safer operation.

- **Parameter Saving:** Implement EEPROM storage for persistent settings.

- **Improved UX:** Add more visual cues or sounds for parameter changes.