부산대학교 도서관

A control circuit for a press can perform various control functions simply by electrically detecting two modes of change, i.e. from OFF to ON and from ON to OFF, of a single rotary cam switch mounted on a press. Until reaching a first slide stroke angle at which the first change of the rotary cam switch takes place, operation of the press depends upon an ON or OFF state of a push button and thereafter the operation continues regardless of the ON-OFF state of the push button. After reaching a second slide stroke angle at which the second change of the rotary cam switch takes place, the operation of the press is stopped with the slide being stopped at a top dead center regardless of depression or non-depression of the push button and restarting of the press function is prevented in case the push button is kept depressed.