CONTROLS for AUTOMATED ADJUSTMENT of PRINT WIRE ACTUATOR SEAL TIME
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-15
In a dot matrix wire printer it is important that the timing of all print wires is the same. This timing is dependent upon the seal time of the print wire actuator (print magnet armature). Seal time is the time it takes the actuator to move from home position to its fully activated position "sealed" against the stator face. The "home" position of the actuator is determined by a backstop screw. It, therefore, follows that (Image Omitted) seal time may be changed by adjustment of the backstop screw. The present embodiment provides the logic to repeatedly energize the print coil, measure the seal time and compare it to the required seal time. The time differential (positive or negative) controls the direction and speed of an automated screwdriver adjusting the backstop screw.