This project uses a pressure touch pad under a sheet of paper to detect the location of a marble on top of that sheet of paper. The coordinates of the marble are then sent to my Axidraw which moves (while drawing a line) directly to the marble. As the pen held by the Axidraw is attempting to go to exactly where the marble is, this attempt will knock the marble away, leading to the whole sequence repeating itself.
Over time, this makes the Axidraw chase the ball around the touch pad, all the while making a record of the approximate path that the marble takes.
