sliprings enable an electrical continuity from a stationary feeding point to the rotating parts, transmitting power and control signals, both analogue and digital. they are used on revolving cranes, rotating platforms and......sliprings enable an electrical continuity from a stationary feeding point to the rotating parts, transmitting power and control signals, both analogue and digital. they are used on revolving cranes, rotating platforms and machines, drilling platforms, and machine tools.