ANORDNING FOR ATT PUNKT FOR PUNKT LEGESPLACERA EN RORLIG ANORDNING

摘要

Pointwise positioning apparatus for positioning a movable assembly includes a small strip defining a series of positions corresponding to an electrical absolute position coding which co-operates with a movable assembly to produce a pulse signal when the movable assembly is or passes a predetermined coded position. A general control motor is coupled mechanically to a step motor, and a logic circuit actuates the general control motor until a first passage through the predetermined position, whereupon the general control motor is actuated in the opposite sense until the movement of the movable assembly reverses, and then the step motor is actuated until the movable assembly again reaches the predetermined position.