Stepper + Potentiometer Arduino

AFMotor_stepper_potentiometer.ino

// ConstantSpeed.pde
// -*- mode: C++ -*-
//
// Shows how to run AccelStepper in the simplest,
// fixed speed mode with no accelerations
// Requires the AFMotor library (https://github.com/adafruit/Adafruit-Motor-Shield-library)
// And AccelStepper with AFMotor support (https://github.com/adafruit/AccelStepper)
// Public domain!

#include <AccelStepper.h>
#include <AFMotor.h>

AF_Stepper motor1(200, 1);

//POTEN
// Variables to store current, previous and move position
int val = 0;
int previous = 0;
int long newval = 0;    


// you can change these to DOUBLE or INTERLEAVE or MICROSTEP!
void forwardstep() {  
  motor1.onestep(FORWARD, SINGLE);
}
void backwardstep() {  
  motor1.onestep(BACKWARD, SINGLE);
}

AccelStepper stepper(forwardstep, backwardstep); // use functions to step

void setup()
{  
   Serial.begin(9600);           // set up Serial library at 9600 bps
   Serial.println("Stepper test!");
    stepper.setMaxSpeed(4800);  // Set speed fast enough to follow pot rotation
  stepper.setAcceleration(4800);  //  High Acceleration to follow pot rotation  
  /* stepper.setSpeed(550);	*/
}

void loop()
{  
  /* stepper.runSpeed();*/
   
//poten
val = analogRead(A0);  //  Read Potentiometer current value
  if ((val > previous+6) || (val < previous-6)) {  // Check that a move of the pot is at least > or < than 6
    newval = map(val, 0, 1023, 0, 200);  // Map value (1600 = 1 stepper shaft rotation)
   
    stepper.runToNewPosition(newval);  // Move stepper to new position
    previous = val;  // save current value into variable previous
  }
  // Serial.println(val);
   
}