Arduino UNO R3 Board + CNC Shield + 4xDRV8825 Driver Kit Documentation
The Arduino UNO R3 Board + CNC Shield + 4xDRV8825 Driver Kit is a comprehensive kit designed for CNC machines, 3D printers, and other stepper motor-based projects. The kit consists of the popular Arduino UNO R3 board, a CNC shield, and four DRV8825 stepper motor drivers. This combination provides a powerful and flexible platform for controlling and driving stepper motors.
Arduino UNO R3 Board:
+ Microcontroller: ATmega328P
+ Operating Voltage: 5V
+ Input Voltage: 7-12V
+ Digital I/O Pins: 14
+ Analog Input Pins: 6
CNC Shield:
+ Compatible with Arduino UNO R3
+ 4-axis stepper motor control
+ MAX/MIN limit switches for each axis
+ Spindle control output
4xDRV8825 Driver Kit:
+ Four DRV8825 stepper motor drivers
+ Microstepping resolution: up to 1/32
+ Peak current rating: 2.5A
+ Operating voltage: 8.2-45V
### Example 1: Basic Stepper Motor Control
This example demonstrates how to control a single stepper motor using the DRV8825 driver and the CNC shield.
```cpp
const int dirPin = 2; // Direction pin
const int stepPin = 3; // Step pin
void setup() {
pinMode(dirPin, OUTPUT);
pinMode(stepPin, OUTPUT);
}
void loop() {
// Set direction
digitalWrite(dirPin, HIGH);
// Take 100 steps
for (int i = 0; i < 100; i++) {
digitalWrite(stepPin, HIGH);
delayMicroseconds(500);
digitalWrite(stepPin, LOW);
delayMicroseconds(500);
}
// Change direction
digitalWrite(dirPin, LOW);
// Take 100 steps in the opposite direction
for (int i = 0; i < 100; i++) {
digitalWrite(stepPin, HIGH);
delayMicroseconds(500);
digitalWrite(stepPin, LOW);
delayMicroseconds(500);
}
}
```
### Example 2: Multi-Axis CNC Machine Control
This example demonstrates how to control a 3-axis CNC machine using the CNC shield and DRV8825 drivers.
```cpp
const int xDirPin = 2; // X-axis direction pin
const int xStepPin = 3; // X-axis step pin
const int yDirPin = 4; // Y-axis direction pin
const int yStepPin = 5; // Y-axis step pin
const int zDirPin = 6; // Z-axis direction pin
const int zStepPin = 7; // Z-axis step pin
void setup() {
pinMode(xDirPin, OUTPUT);
pinMode(xStepPin, OUTPUT);
pinMode(yDirPin, OUTPUT);
pinMode(yStepPin, OUTPUT);
pinMode(zDirPin, OUTPUT);
pinMode(zStepPin, OUTPUT);
}
void loop() {
// Move to starting position
digitalWrite(xDirPin, HIGH);
digitalWrite(yDirPin, HIGH);
digitalWrite(zDirPin, HIGH);
for (int i = 0; i < 100; i++) {
digitalWrite(xStepPin, HIGH);
digitalWrite(yStepPin, HIGH);
digitalWrite(zStepPin, HIGH);
delayMicroseconds(500);
digitalWrite(xStepPin, LOW);
digitalWrite(yStepPin, LOW);
digitalWrite(zStepPin, LOW);
delayMicroseconds(500);
}
// Move to target position
digitalWrite(xDirPin, LOW);
digitalWrite(yDirPin, LOW);
digitalWrite(zDirPin, LOW);
for (int i = 0; i < 200; i++) {
digitalWrite(xStepPin, HIGH);
digitalWrite(yStepPin, HIGH);
digitalWrite(zStepPin, HIGH);
delayMicroseconds(500);
digitalWrite(xStepPin, LOW);
digitalWrite(yStepPin, LOW);
digitalWrite(zStepPin, LOW);
delayMicroseconds(500);
}
}
```
### Example 3: CNC Machine with Limit Switches and Spindle Control
This example demonstrates how to use the limit switches and spindle control output on the CNC shield.
```cpp
const int xDirPin = 2; // X-axis direction pin
const int xStepPin = 3; // X-axis step pin
const int xMinPin = 8; // X-axis minimum limit switch pin
const int spindleCtrlPin = 9; // Spindle control pin
void setup() {
pinMode(xDirPin, OUTPUT);
pinMode(xStepPin, OUTPUT);
pinMode(xMinPin, INPUT_pullup);
pinMode(spindleCtrlPin, OUTPUT);
}
void loop() {
// Check X-axis minimum limit switch
if (digitalRead(xMinPin) == LOW) {
// Move away from minimum limit
digitalWrite(xDirPin, HIGH);
for (int i = 0; i < 100; i++) {
digitalWrite(xStepPin, HIGH);
delayMicroseconds(500);
digitalWrite(xStepPin, LOW);
delayMicroseconds(500);
}
}
// Start spindle
digitalWrite(spindleCtrlPin, HIGH);
delay(1000);
// Stop spindle
digitalWrite(spindleCtrlPin, LOW);
delay(1000);
}
```
These examples demonstrate the basic functionality of the Arduino UNO R3 Board + CNC Shield + 4xDRV8825 Driver Kit. You can modify and extend these examples to suit your specific project requirements.
