(under subclass 590) Subject matter in which the servo system includes means responsive to the error signal to operate the servo full on or completely off until a desires position operating range is attained at which point a proportional control means assumes control to bring the servo to a
predetermined final position.
(1) Note. This subclass also includes systems in which during the "on-off" mode, the power may be periodically switched on and off.
(2) Note. The servo systems classified herein differ from the "slewing" systems elsewhere (see search notes below) in that the error signal maintains full control of the servo during both "on-off" and proportional control modes, whereas in a slewing control system control by the error signal is lost.
