PRINT ACTUATOR BACKSTOP System
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Print actuator settle-out following energization can be achieved simply and quickly with greater operating margin by pivotally suspending a reactive mass for impact by the actuator and limiting the motion of the mass with energy-absorbing polymeric restraints. In the figure, a print actuator comprises an armature 1 that is urged left from a retracted, phantom position to an extended position, shown in solid line, by a pair of energized coils PRINT ACTUATOR BACKSTOP SYSTEM2 on stator 3. The armature drives push rod 4 against a spring-loaded hammer (not shown). After the drive pulse terminates, armature 1 is urged to its retracted position, engaging an elastomeric pad on adjustable stop 5 supported on reactive mass 6 fixed on pivot 7 that is rotatable within openings 8 in a pair of side plates 9.