Quote Originally Posted by hoppo View Post
I'm driving it with an Arduino board and cheap driver circuit that I found on eBay. Basically it carries an SLR camera, and I have programmed the Arduino to drive the stepper motor by turning it for x amount of revolutions. Then to pause and take a photo, and repeat until it has travelled the full length of the dolly.
you shouldent really stop to take the photo or you will have no motion blur, it will show in your finished project as a perceivable jump from frame to frame on any close objects with hard edges

the begining of saving private ryan on the beach is shot at a 45 degree shutter angle to give it a stark look
the standard is usualy 180 degree shutter... 50% of the time the shutter is open and 50% of the time shut
EG: a 1 second exposure requires a 1 second delay before the next exposure... you have no need to worry about the speed of the tracking as the motion (smoothing) blur will correspond accordingly at whatever speed you choose

so as well as making your machine a tad more simple to make and use this will also make your films smother and more "filmic" between frames