Arduino Uno to drive 2 unipolar stepper motors I need to use two stepper motors to move microscope positioning knobs in the X/Y direction. The stepper motors I have are unipolar and are 6V rated (I think).

I know it's possible to drive a unipolar stepper motor via a ULN2003 using an Arduino Uno. I know I can wire it using the 2-wire or 4-wire method.

But my questions are:

Is it possible to drive 2 of them? What are the modifications I will need to make to the circuit? Will this harm my Arduino? Do I need a stepper motor shield?
No problem. Just use two ULN2003 chips, one for each stepper. 

No need for a motor/stepper shield on these unipolar steppers. 

It will not harm the arduino (if wired correctly).