A packaging machine having at least a pair of independently driven conveyors on which packages are adapted to be carried though the machine for processing, a micro-controller having a memory in which is stored a computer program containing computer readable instructions, a database/look-up table containing data correlating package sizing parameters with optimal speed profiles at which the machine can run effectively, at least one motor that drives each conveyor, and a motor controller that is electronically linked to the micro-controller for purposes of adjusting the speed at which the motor runs based upon the speed profile of the package.