![]() ![]() In this tutorial, you learned how to interface with and control a stepper motor. Our stepper motor rotates fine for speed 0 to 25 RPM and it varies from motor to motor. To stop rotating motor or to run a motor at the different speed, just press reset button of Arduino Uno. Now, your motor starts rotating in clockwise and anticlockwise alternately. Please provide motor speed and press enter. You will see a message on the serial monitor about stepper motor speed. Now upload the above sketch and open the serial monitor. of steps requires to move ‘X’ angle = ( stepsPerRevolution / 360 ) * ‘X’ stepsPerRevolution = (360/Step Angle) * Gear ratio.The formula’s to calculate steps required to move one revolution and move to a specific angle: You need this value to calculate the number of steps required to move the motor 360 degrees(one revolution). To know more about the library and its functions refer the link here. The gear ratio of our stepper motor is 64 and step angle for 4 step sequence is 11.25 degrees. Arduino’s ‘Stepper’ library runs in 4 step mode. Motor.step(-stepsPerRevolution) // rotate motor in anticlockwise direction for one revolutionĪbove sketch/code uses Arduino’s standard library ‘Stepper’. Serial.println("counterclockwise") // print text on serial monitor step one revolution in the other direction: Motor.step(stepsPerRevolution) // rotate motor in clockwise direction for one revolution Serial.println("clockwise") // print text on serial monitor tSpeed(user_speed) // Set stepper motor speed to user defined speed ![]() Serial.println(user_speed) // print user speed on serial monitor Int user_speed= Serial.parseInt() // Read entered integer value and store it in a variable ![]() Stepper motor (stepsPerRevolution, in1Pin, in3Pin, in2Pin, in4Pin ) void setup ( ) // wait here until user enter input data #include //Declare variables and assign pin number int in1Pin = 8 int in2Pin = 9 int in3Pin = 10 int in4Pin = 11 const int stepsPerRevolution = 2048 // Update the number of steps per revolution required for your motor // Create a stepper object // Note: We are using 28BYJ-48 5VDC Stepper Motor, for this motor, we need to set wiring sequence to (1-3-2-4) instead of (1-2-3-4) Write a code to drive stepper motor clockwise and anticlockwise: Look at above fig 3 and wiring details to interface the stepper motor with Arduino Uno. Connect ULN Driver Board and Stepper motor using the connector as shown in fig.Connect ‘GND’ pin of Arduino Uno to ‘-‘ pin of ULN Driver Board.Connect ‘Vcc’ pin of Arduino Uno to ‘+’ pin of ULN Driver Board.Connect pin number (8 to 11) of Arduino Uno to ULN Driver Board pin (IN1 to IN4) respectively.Interfacing of Stepper Motor with Arduino Uno: Fig.3 Interfacing of Stepper Motor with Arduino Uno We used it for testing Fitbit heart rate monitoring system, you will get the details here.Below are the few applications where you can use the stepper motor: Stepper motors can’t run at higher speeds but have a high holding torque. You can use the stepper motor in any application where you need precise positioning with a motor. For what kind of applications do you need Stepper Motor? We bought for our engineers this Arduino super-starter kit. Note: You can get these components fairly easily at many places (including online). So, a driver is must for driving a stepper motor. ![]() Arduino Uno alone is not capable to drive a stepper motor. To know more about how stepper motor works refer the link here.Ībove fig 2 shows ULN2003 Driver Board. To move stepper motor in clockwise or anticlockwise direction, we need to provide a step signals in specific sequential order to the stepper motor. By controlling phase coils, you can move the stepper motor. Stepper Motor (28BYJ-48) operates on 5V DC and it is unipolar type of stepper motor. 1 shows the image of stepper motor 28BYJ-48 and its step wiring details. In this tutorial, you will learn about how to interface stepper motor with Arduino and how to move rotor accurately to a specific angle. This is the last tutorial of Arduino tutorial series. ![]()
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