This is our medium-size turntable. The table top has a diameter of 1m. It is manually controlled. The maximum speed is about 3Hz, however, no one was ever suicidal enough to work with it at this speed.
The turntable incorporates at nine-channel slip-ring assembly. Three rings are used for mains, such that 220V AC is available on the rotating table. The remaining rings can be used to transmit signals from the rotating table to equipment not positioned on the table or vice versa. In the picture you can, for instance, see a video camera mounted on the superstructure of the table. With this camera it is possible to view experiments on the rotating table on a monitor in the stationary laboratory.