Project - Control speed and direction of 4 stepper motors with potentiometer and toggle switches respectively and display the speed of the stepper motor on a LCD.
Hardware -
Stepper motor - NEMA 17
Current - 1.5 A
Resistance - 2.8 ohms
Inductance - 5.5 mH
Holding Torque - 55 N.cm
Detent Torque - 2.6 N.cm
No. of Leads - 4 (bipolar)
Motor Driver - L298N
Logical Voltage - 5V
Drive voltage 5V - 35V
Logical currrent 0 - 36mA
Drive current - 2A
Max power - 25W
Power supply - 12V 10A
LCD - RG 1602 A
Arduino Mega
Problems -
1st - When the power is connected and pot value is changed to a non-zero value, the stepper motor rotates for 7-11 rotations as intended and then keeps taking a break of roughly 250ms, after every 0.75 - 1.5 rotation. Ideally the motors should run smoothly for a very long time.
2nd - As soon as I try to run even 3 motors together Arduino suffers a power outage and keeps restarting. Ideally all 4 motors should be able to run together at max speed and load.
3rd - After plugging in the power and not running any motor, the driver connecting the 5V to the Arduino gets extremely hot and starts smoking up.
Code -
#include <Stepper.h>
#include <LiquidCrystal.h>
#define switch1 31
#define switch2 33
#define switch3 35
#define switch4 37
const int stepsPerRevolution = 200;
Stepper myStepper1(stepsPerRevolution, 5, 4, 3, 2);
Stepper myStepper2(stepsPerRevolution, 9, 8, 7, 6);
Stepper myStepper3(stepsPerRevolution, 13, 12, 11, 10);
Stepper myStepper4(stepsPerRevolution, 23, 25, 27, 29);
LiquidCrystal lcd (38, 40, 42, 44, 46, 48);
int stepCount1 = 0;
int stepCount2 = 0;
int stepCount3 = 0;
int stepCount4 = 0;
void setup() {
Serial.begin(9600);
lcd.begin(16, 2);
lcd.clear();
pinMode(switch1, INPUT_PULLUP);
pinMode(switch2, INPUT_PULLUP);
pinMode(switch3, INPUT_PULLUP);
pinMode(switch4, INPUT_PULLUP);
}
void loop() {
int sensorReading1 = analogRead(A0);
int sensorReading2 = analogRead(A1);
int sensorReading3 = analogRead(A2);
int sensorReading4 = analogRead(A3);
int toggle1 = digitalRead(switch1);
int toggle2 = digitalRead(switch2);
int toggle3 = digitalRead(switch3);
int toggle4 = digitalRead(switch4);
int motorSpeed1 = map(sensorReading1, 0, 1023, 0, 100);
int motorSpeed2 = map(sensorReading2, 0, 1023, 0, 100);
int motorSpeed3 = map(sensorReading3, 0, 1023, 0, 100);
int motorSpeed4 = map(sensorReading4, 0, 1023, 0, 100);
lcd.setCursor(0, 0);
lcd.print("M1: " + (String) motorSpeed1 + " M2: " + (String) motorSpeed2 + " ");
lcd.setCursor(0, 1);
lcd.print("M3: " + (String) motorSpeed3 + " M4: " + (String) motorSpeed4 + " ");
if (motorSpeed1 > 0 && toggle1 == 1)
{
myStepper1.setSpeed(motorSpeed1);
myStepper1.step(stepsPerRevolution / 100);
}
if (motorSpeed1 > 0 && toggle1 == 0)
{
myStepper1.setSpeed(motorSpeed1);
myStepper1.step(-(stepsPerRevolution / 100));
}
if (motorSpeed2 > 0 && toggle2 == 1)
{
myStepper2.setSpeed(motorSpeed2);
myStepper2.step(stepsPerRevolution / 100);
}
if (motorSpeed2 > 0 && toggle2 == 0)
{
myStepper2.setSpeed(motorSpeed2);
myStepper2.step(-(stepsPerRevolution / 100));
}
if (motorSpeed3 > 0 && toggle3 == 1)
{
myStepper3.setSpeed(motorSpeed3);
myStepper3.step(stepsPerRevolution / 100);
}
if (motorSpeed3 > 0 && toggle3 == 0)
{
myStepper3.setSpeed(motorSpeed3);
myStepper3.step(-(stepsPerRevolution / 100));
}
if (motorSpeed4 > 0 && toggle4 == 1)
{
myStepper4.setSpeed(motorSpeed4);
myStepper4.step(stepsPerRevolution / 100);
}
if (motorSpeed4 > 0 && toggle4 == 0)
{
myStepper4.setSpeed(motorSpeed4);
myStepper4.step(-(stepsPerRevolution / 100));
}
Serial.println(motorSpeed1);
Serial.println(sensorReading1);
}
Circuit - image attached
