steppermotor with big easy stepper shield and accelstepper library

Projects Programming
2

I hope someone can point me into the right direction..

Right here, barely into loop(), and you're going the wrong way already.

void loop()  
{ 
 delay(1000);

Read, study, and embrace the blink without delay mindset, without delay.

       {
         stepper.setCurrentPosition(0); 
         stepper.moveTo(pos);   
         stepper.run();
       }

Why are these curly braces here?

The run() method should start the stepper moving. It returns immediately, before the stepper has had a chance to move.

You need to then, periodically, ask the instance whether the stepper is where it needs to be BEFORE taking the picture.

You need to develop a simple sketch that moves the stepper using the library, working on that sketch until you can successfully move the motor. Only then should you worry about taking a picture.

Also, I don't see anywhere in that code where you set the acceleration, deceleration, or when the accell/decel is to happen.