Abstract: A high speed conveyor sorting system includes a plurality of infeed conveyors coupled to an induction station including a merging conveyor for singulating articles from the infeed conveyor and inducting them onto a sorting conveyor. An operator actuated control system is employed for controlling the release mechanism of the induction station and diverters spaced along the sorting conveyor for discharging articles from the sorting conveyor onto preselected diverting conveyors spaced longitudinally along the sorting conveyor. The control system includes a portable training detector which is movably positioned near each of the divert locations such that the travel of an article from a predetermined reference point detector near the induction station to each of the divert locations can be accurately ascertained by counting pulses from a pulse position indicator associated with the conveyor during the travel interval of the article.