A pick and place head for a pick and place
machine includes a stationary frame; a first circuit board mounted on the stationary frame, the first circuit board including a first plurality of electric circuits; a rotating frame rotatably mounted to the stationary frame; a plurality of spindle assemblies mounted one the rotating frame, each of the plurality of spindle assemblies including a set of electric contacts; a second circuit board mounted on the rotating frame, the second circuit board including a second plurality of electric circuits; a
slip ring assembly mounted between the first circuit board and the second circuit board; the
slip ring assembly including a first portion and a second portion; the first portion of the
slip ring assembly being rotatable relative to the second portion of the slip ring assembly, and the slip ring assembly further including a set of electrical connectors that enable the first plurality of electric circuits to maintain
electrical connection with the second plurality of electric circuits while the first portion rotates relative to the second portion; the second circuit board further including a plurality of electric contacts, the plurality of electric contacts on the second circuit board engaged with respective ones of the contacts of the plurality of spindle assemblies; an
electric bus connected to the first plurality of circuits so as to provide power and control signals to the pick and place head; and a motor to rotate the second circuit board.