Lab: Servo Motor Control with an Arduino. Serial Output from an Arduino to Processing. Controlling Stepper Motors.

Stepper motors are increasingly taking its position in the world of the electronics. Starting from a normal Surveillance camera to a complicated CNC machines/Robot these Stepper Motors are used everywhere as actuators since they provide accurate controlling. In this tutorial we will learn about the most commonly/cheaply available stepper motor 28-BYJ48 and how to interface it with Arduino using ULN2003 stepper module. In last project we have, where you can rotate the stepper motor by entering the rotation angle in Serial Monitor of Arduino.

Here in this project, we will Rotate the Stepper Motor using Potentiometer and Arduino, like if you turn the potentiometer clockwise then stepper will rotate clockwise and if you turn potentiometer anticlockwise then it will rotate anticlockwise. Stepper Motors: Let us take a look at this 28-BYJ48 Stepper motor. Okay, so unlike a normal DC motor this one has five wires of all fancy colors coming out of it and why is it so?

To understand this we should first know how a stepper works and what its specialty is. First of all steppers motors do not rotate, they step and so they also known as step motors. Meaning, they will move only one step at a time. These motors have a sequence of coils present in them and these coils have to be energized in a particular fashion to make the motor rotate. Diablo 3 Playstation 3 Downloadable Content here. When each coil is being energized the motor takes a step and a sequence of energization will make the motor take continuous steps, thus making it to rotate. Let us take a look at the coils present inside the motor to know exactly know from where these wires come from.

As you can see the motor has Unipolar 5-lead coil arrangement. Oxford Handbook Of Ent And Head And Neck Surgery Pdf more. There are four coils which have to be energized in a particular sequence. The Red wires will be supplied with +5V and the remaining four wires will be pulled to ground for triggering the respective coil.

We use a microcontroller like Arduino energize these coils in a particular sequence and make the motor perform the required number of steps. So now, why is this motor called the 28-BYJ48? I don’t know. There is no technical reason for this motor for being named so; maybe we should dive much deeper into it. Let us look at some of the important technical data obtained from the datasheet of this motor in the picture below.

That is a head full of information, but we need to look at few important ones to know what type of stepper we are using so that we can program it efficiently. First we know that it is a 5V Stepper motor since we energize the Red wire with 5V. Then, we also know that it is a four phase stepper motor since it had four coils in it. Al Bayan By Javed Ghamidi Pdf Creator. Now, the gear ratio is given to be 1:64. This means the shaft that you see outside will make one complete rotation only if the motor inside rotates for 64 times.