This is the finished spherical positioner deployed in an anechoic chamber. The system allows a wireless product to be viewed at any orientation of the device with respect to a test antenna. This system works in spherical co-ordinates which tend to numb the brain compared to rectangular co-ordinates when you think about it too long. The positioner allows for a Theta axis rotation of 360 degrees although we limit to 180 degrees and a Phi axis rotation of 360 degrees.The axises uses steppers and a simple drive system controlled by EMC2 to give computer control over Theta and Phi. A home sensor allows each axis to find zero again when need be.
