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An armature connected to a print wire is continuously vibrated at a high frequency in a short stroke and is driven toward a print paper to deviate the center of vibration when printing is required.
English (United States)
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Magnetic Actuator For Wire Matrix Printer
An armature connected to a print wire is continuously vibrated at a high
frequency in a short stroke and is driven toward a print paper to deviate the
center of vibration when printing is required.
Armature 1 is held in the normal position by the force of springs 2 and 3.
When coil 4 is energized with a pulsive current, the armature is driven back and
forth at the normal position to be vibrated. The amplitude of the vibration is too
small for wire 6 to strike paper 7, and the wire drive speed caused by the
vibration can be made faster than that in a conventional magnet drive
mechanism. When printing is required, coil 5 is energized with a pulsive current,
the width of which depends on the number of dots to be printed. This means that
the center of vibration is deviated some distance toward paper 7. This enables
high speed printing with lower drive current than that in a conventional
mechanism. Cores 8 and 9, and iron pole 10 are assembled with bobbin 11 using
screw 12. The initial normal position of armature 1 can be adjusted by piston 13
and screw 14.
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