tennis ball machine, particularly for tennis balls.

摘要

A machine for delivering balls, especially tennis balls, has a ball feeder (6) to feed individual balls (5) from a ball magazine (2) to a ball ejector (3) and a machine intrinsic feed controller (30) for sending internal control signals, controlling the ball feed and thus the ejection time, to the ball feeder (6). To enable external synchronization of the ball ejection time of several machines that the machine for delivering balls has a device (33, 35) to deactivate the machine's own feed controller (30) and a control input (34) connected electrically to the ball feeder (6) in order to attach an external control cable (39), by way of which, instead of the internal control signals external control signals, controlling the ball feed, and thus the ejection time, can be fed to the ball feeder (6).