Small project with NEMA23 and load cell

[karl2205]

hi i recently started using Arduino and have a certain project i don't know why but i don't actually have any error messages but whenever i connect the my Mega 2560 to the components the motor wont work and i recently added a toggle switch thinking it might solve my problem but it ended up much worse i would like to ask for your help about what is wrong with my code I am using a NEMA 23 stepper motor and lcd with I2C and an hx711 load amplifier for my load cell as well as a keypad for input `

`

#include <HX711_ADC.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

// Load Cell and Keypad settings
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'.', '0', '#', 'D'}
};
byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8, 9};

HX711_ADC LoadCell1(52, 53);
HX711_ADC LoadCell2(6, 7);

LiquidCrystal_I2C lcd1(0x27, 20, 4);
LiquidCrystal_I2C lcd2(0x3F, 20, 4);

Keypad keypad1 = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
Keypad keypad2 = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

float initialRPM1 = 0;
float initialRPM2 = 0;
bool saved1 = false;
bool saved2 = false;

// Motor control settings
int driverPUL = 47;    // PUL- pin
int driverDIR = 46;    // DIR- pin
int spd = A0;          // Potentiometer
int switchPin = 10;    // SPDT toggle switch pin

int pd = 500;          // Pulse Delay period
boolean setdir = LOW;  // Set Direction

void setup() {
  LoadCell1.begin();
  LoadCell1.start(500);
  LoadCell1.setCalFactor(1000.0);

  LoadCell2.begin();
  LoadCell2.start(500);
  LoadCell2.setCalFactor(1000.0);

  lcd1.init();
  lcd1.backlight();
  
  lcd2.init();
  lcd2.backlight();

  pinMode(driverPUL, OUTPUT);
  pinMode(driverDIR, OUTPUT);
  pinMode(switchPin, INPUT_PULLUP);  // Enable internal pull-up resistor
}

void loop() {
  // Read switch state
  int switchState = digitalRead(switchPin);
  
  // Set direction based on switch state
  if (switchState == HIGH) {
    // Set direction for forward motion
    digitalWrite(driverDIR, HIGH);
  } else {
    // Set direction for reverse motion
    digitalWrite(driverDIR, LOW);
  }

  handleKeypadInputAndDisplay(LoadCell1, lcd1, keypad1, initialRPM1, saved1);
  handleKeypadInputAndDisplay(LoadCell2, lcd2, keypad2, initialRPM2, saved2);
  
  // Motor control logic
  pd = map(analogRead(spd), 0, 1023, 2000, 50);
  digitalWrite(driverPUL, HIGH);
  delayMicroseconds(pd);
  digitalWrite(driverPUL, LOW);
  delayMicroseconds(pd);
}

void handleKeypadInputAndDisplay(HX711_ADC &loadCell, LiquidCrystal_I2C &lcd, Keypad &keypad, float &initialRPM, bool &saved) {
  loadCell.update();
  float i = loadCell.getData();
  float torque = i / 1000 * 0.3048 * 9.80665;
  float power = i / 1000 * 0.3048 * 9.80665 * 2 * 3.1415 * (initialRPM / 60.0);

  char key = keypad.getKey();

  if (key != NO_KEY) {
    if (isDigit(key) || key == '.') {
      if (key == '.') {
        initialRPM += 0.1;
      } else {
        initialRPM = (initialRPM * 10) + (key - '0');
      }
    } else if (key == 'A') {
      initialRPM = initialRPM / 10;
    } else if (key == 'B') {
      initialRPM = 0;
    } else if (key == 'D') {
      saved = true;
    } else if (key == 'C') {
      initialRPM = 0;
      saved = false;
    }

    lcd.clear();
    lcd.setCursor(13, 0);
    lcd.print("RPM:");
    lcd.setCursor(13, 1);
    if (saved) {
      lcd.print("SAVED");
    } else {
      lcd.print(initialRPM);
    }
  }

  lcd.setCursor(0, 0);
  lcd.print("TORQUE(N-m):");
  lcd.setCursor(0, 1);
  lcd.print(torque);

  lcd.setCursor(0, 2);
  lcd.print("POWER(w):");
  lcd.setCursor(0, 3);
  lcd.print(power);
}

[gilshultz]

That could be a power or wiring problem. post an accurate annotated schematic of your circuit as you have it wired. Frizzy pictures are not considered schematics they are wiring diagrams and almost useless. Also post links to "Technical Information" for the hardware devices, links to places like azon generally give sales information, not technical information. Be sure to show all connections, power, ground, and power sources.

[TomGeorge]

Hi, @karl2205
Welcome tp the forum.

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@karl2205

NEMA 23 stepper motor

Can you please post a link to data/spec of the stepper?
NEMA 23 is a reference to the motors physical size.

Thanks.. Tom..