How to interface Stepper Motor with PIC18F4550 Microcontroller- (Part 13/25)

As stated earlier, a Stepper motor rotates step by step. Each stepper motor has a defined step angle which is the minimum degree of rotation in a single step. This step angle depends on the internal construction of the motor. If a stepper motor has a step angle of 1.8°, then it would need 200 steps for a complete circular rotation. For control operation, construction and stepping modes, refer the article on Stepper Motors.

 

The stepper motor consists of a Rotor and four Stators. The stators are rounded with center-taped winding. The center-taped terminals are known Common terminals. Thus a unipolar stepper motor consists of total 6 wire-ends (four wires for coils and two for the common ends).

 

Project Source Code

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// Program to Interface Stepper Motor with PIC18F4550 Microcontroller
void main()
{
unsigned int i=0;
TRISB=0; // Set PortB as output port
while(1)
{
LATB=0x07; // To send 1110 at PortB
Delay_ms(20);

LATB=0x0B; // To send 1101 at PortB
Delay_ms(20);

LATB=0x0D; // To send 1011 at PortB
Delay_ms(20);

LATB=0x0E; // To send 0111 at PortB
Delay_ms(20);
}
}

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Source: How to interface Stepper Motor with PIC18F4550 Microcontroller- (Part 13/25)