This is a simple Processing script to drive a Nema motor through the Easystepper driver and an Arduino

Stepper motor demo

/********************************************************
**         More info about the project at:             **
**  http://lusorobotica.com/viewtopic.php?t=103&f=106  **
**   by TigPT         at         [url=http://www.LusoRobotica.com]www.LusoRobotica.com[/url]  **
*********************************************************/
int dirPin = 2;
int stepperPin = 3;

void setup() {
  pinMode(dirPin, OUTPUT);
  pinMode(stepperPin, OUTPUT);
}

void step(boolean dir,int steps, int stp_int){
  digitalWrite(dirPin,dir);
  delay(50);
  for(int i=0;i<steps;i++){
    digitalWrite(stepperPin, HIGH);
    delayMicroseconds(stp_int);
    digitalWrite(stepperPin, LOW);
    delayMicroseconds(stp_int);
  }
}

void loop(){
  step(true,160,100);
  step(false,160,100);
  int s =10;
  for(int i=0;i< 10;i++){
  step(true,1600,s);
  s = s * 2;
  } 
  step(true,1600,100);
  delay(500);
  step(false,1600*5,100);
  delay(500);
}