Stepper testing

#include <AccelStepper.h>


// Define a stepper motor 1 for arduino 
// direction Digital 9 (CW), pulses Digital 8 (CLK)
AccelStepper stepper(1, 8, 9);

char serialData;
String sMoveTo;
int iMoveTo;
int AzSpeed;
float AzCal = 11.18889;//4028 step per revolution.
int SpeedMin = 25;
int SpeedMax = 500;
float SpeedFactor = 1.05;

void setup()
{  
   Serial.begin(9600);           // set up Serial library at 9600 bps
   Serial.println("Stepper test!");
  
  // Change these to suit your stepper if you want
  stepper.setMaxSpeed(500);//1100    
  stepper.setAcceleration(1000);//1100
  AzSpeed = 50;
}

void loop()
{
    while (Serial.available()) {
      delay(10);
      serialData = Serial.read();
      sMoveTo += serialData;
    }
    if (sMoveTo.length() != 0){
      iMoveTo = sMoveTo.toInt();
      sMoveTo = "";
      stepper.moveTo(AzCal * iMoveTo);
      //Serial.println(iMoveTo);
    }
  
    if (stepper.distanceToGo() != 0){
      stepper.run();
    }

}