This is the first project where the safety of the general public needed to be considered. The sculpture is driven by a large NEMA42 stepper motor connected to a gear box. When someone turns the wheel on the side in the correct direction the motor will start turning and will continue as long as the wheel is being turned. While the machine is in motion various sensors and interlocks prevent a user from opening the door, and even if they pry the door open the interlock would force the motor to stop immediately. Only when the motor is stopped and a shelf is at the correct position will the door be unlocked.
More details about the project
http://www.brosepartington.com/
https://www.youtube.com/watch?v=lNNWX5LInh8
Bookshelf Sculpture
