Abstract: A combination weigher which optimizes the delivered weight of product based on current operating conditions is disclosed. The weigher includes a microprocessor which is programmed to perform a combination search on all of the balances which are in a ready state including any balances which reach the ready state almost immediately before a signal to discharge a selected combination.

Abstract: The invention relates to a combination weighing system for non-uniform weight items which comprises a plurality of hoppers that selectively empty by means of gates into a chute, and then usually into a packaging machine. The system further comprises check weighers associated with each hopper and a combination selection and machine control logic which typically receives weight signals from the check weighers and sends discharge signals to predetermined gates so as to combine items in order to achieve a nominal weight between a predetermined minimum weight and maximum weight. The improvement comprises a set point determining circuit which includes logic blocks to establish a changeable set point within the range of the maximum and minimum weights. The logic blocks allow weights below a set weight and/or maintenance of an overall average weight for the output of the system.