So This is it. The solution as to how to create an unpredictable set of outcomes from a predictable system. After many adjustments and different prototypes the masterpiece is unveiled. Although it may look like fairly hasty, much thought has gone into this and although it has been described as 'crude' beautiful images have been produced.
The device was inspired by the movement of a double pendulum but rather than being hung vertically and being powered by gravity, here a similar system is supported horizontally on a pivot and operated by the force with which the door in opened.
It consists of three arms that move randomly and independently from one another with the use of bolted pivots. The other end of the contraption is counterbalanced to ensure as smooth a motion as possible.
Recording the trace of the movement proved to be more challenging than initially expected. I originally intended to attach a paint brush dipped in ink to the end of each arm and then to place a large piece of paper under the door.
Unfortunately the paint brushes created too much friction with the floor and the motion of the device was severely impaired. Instead the paint brushes were replaced with small LED torches and there results were a pleasant surprise.
These Images were taken with bulbs on two arms only with the door being opened and shut only once; in reality I carried out numerous experiments with different amounts of torches and door openings. For my pinup i edited the colour of the images to make them more readable as print outs and my panels looked like this.
The image above shows 5 individual door traces for Two light and one system oscillation. The image below shows what traces would be left if the door was opened 5 consecutive times and each varying path was recorded within the same frame. Because of time limits of my cameras shutter speed I had to layer the image on photoshop.
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