Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including a DM542 stepper driver, a 5V 2-Relay JD-VCC module, a keypad shield, a NEMA 23 stepper motor, limit switches, an emergency stop button, and indicator lamps. The circuit is designed to control a stepper motor and provide user input through a keypad shield, with safety features such as limit switches and an emergency stop button.

Component List

DM542 Stepper Driver

• Description: Stepper motor driver
• Pins: B-, B+, A-, A+, DC+, DC-, ENA-, ENA+, DIR-, DIR+, PUL-, PUL+

5V 2-Relay JD-VCC

• Description: Relay module
• Pins: JD-VCC, VCC, GND, IN1, IN2, NO, COM, NC

Keypad Shield

• Description: Keypad and LCD shield for Arduino
• Pins: rst, d, 5v, vin, A0, A1, A2, A3, A4, A5

NEMA 23 Stepper Motor

• Description: Stepper motor
• Pins: B2 Red, B1 Blue, A2 Black, A1 Green

Arduino UNO

• Description: Microcontroller board
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

GND

• Description: Ground connection
• Pins: GND

Limit Switch

• Description: Mechanical switch for limit detection
• Pins: C, NO, NC

Emergency STOP

• Description: Emergency stop button
• Pins: NC

SMPS

• Description: Switched-mode power supply
• Pins: L, N, GND, -DC, +DC

Lamp Red

• Description: Red indicator lamp
• Pins: +, -

Pilot Lamp Green

• Description: Green indicator lamp
• Pins: X1, X2

Wiring Details

DM542 Stepper Driver

• PUL-: Connected to ENA- and DIR-
• ENA-: Connected to PUL- and DIR-
• ENA+: Connected to PUL- and DIR-
• DIR-: Connected to PUL- and ENA-
• DIR+: Connected to Arduino UNO D3
• PUL+: Connected to Arduino UNO D2
• B-: Connected to NEMA 23 A2 Black
• B+: Connected to NEMA 23 A1 Green
• A-: Connected to NEMA 23 B2 Red
• A+: Connected to NEMA 23 B1 Blue
• DC+: Connected to Emergency STOP NC and Lamp Red +
• DC-: Connected to SMPS -DC and 5V 2-Relay JD-VCC NC

5V 2-Relay JD-VCC

• JD-VCC: Connected to Arduino UNO 5V and Keypad Shield 5v
• VCC: Connected to Arduino UNO 5V and Keypad Shield 5v
• GND: Connected to Arduino UNO GND
• IN2: Connected to Arduino UNO D7
• NC: Connected to DM542 stepper driver DC-
• NO: Connected to Pilot Lamp Green X1

Keypad Shield

• 5v: Connected to Arduino UNO 5V and 5V 2-Relay JD-VCC VCC
• vin: Connected to Arduino UNO Vin
• A1: Connected to Limit Switch NO and Arduino UNO A1
• A2: Connected to Limit Switch NC and Arduino UNO A2
• A3: Connected to Arduino UNO A3
• A4: Connected to Arduino UNO A4
• A5: Connected to Arduino UNO A5

NEMA 23 Stepper Motor

• A2 Black: Connected to DM542 stepper driver B-
• A1 Green: Connected to DM542 stepper driver B+
• B2 Red: Connected to DM542 stepper driver A-
• B1 Blue: Connected to DM542 stepper driver A+

Arduino UNO

• 5V: Connected to Keypad Shield 5v and 5V 2-Relay JD-VCC VCC
• GND: Connected to 5V 2-Relay JD-VCC GND and Limit Switch C
• Vin: Connected to Keypad Shield vin
• A1: Connected to Keypad Shield A1 and Limit Switch NO
• A2: Connected to Keypad Shield A2 and Limit Switch NC
• A3: Connected to Keypad Shield A3
• A4: Connected to Keypad Shield A4
• A5: Connected to Keypad Shield A5
• D2: Connected to DM542 stepper driver PUL+
• D3: Connected to DM542 stepper driver DIR+
• D7: Connected to 5V 2-Relay JD-VCC IN2
• D13: Connected to DM542 stepper driver PUL-, ENA-, ENA+, and DIR-

Limit Switch

• C: Connected to Arduino UNO GND
• NO: Connected to Keypad Shield A1 and Arduino UNO A1
• NC: Connected to Keypad Shield A2 and Arduino UNO A2

Emergency STOP

• NC: Connected to DM542 stepper driver DC+ and Lamp Red +

SMPS

• -DC: Connected to DM542 stepper driver DC- and 5V 2-Relay JD-VCC NC
• +DC: Connected to Emergency STOP NC, Lamp Red -, and Pilot Lamp Green X2

Lamp Red

• +: Connected to DM542 stepper driver DC+
• -: Connected to SMPS +DC

Pilot Lamp Green

• X1: Connected to 5V 2-Relay JD-VCC NO
• X2: Connected to SMPS +DC

Code Documentation

Arduino UNO Code

/*
 * This Arduino Sketch initializes the LCD on the keypad shield.
 * The LCD is connected to the Arduino UNO via the analog pins.
 */

#include <LiquidCrystal.h>

// Initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
  // Set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Hello, World!");
}

void loop() {
  // Nothing to do here
}

This code initializes the LCD on the keypad shield connected to the Arduino UNO. The LCD is set up with 16 columns and 2 rows, and it displays the message "Hello, World!" upon initialization. The loop function is empty as there is no repetitive task to perform.