| 摘要 |
PURPOSE:To prevent operational deterioration due to magnetic interference, by reducing a number of winding of a coil corresponding to a printing wire arranged to the end part of a leading end guide or in the vicinity thereof, or setting the drive time of said coil longer, as compared with a coil corresponding to the other printing wires. CONSTITUTION:A coil corresponding to the printing wires #1, #23 arranged to the end part of a leading end guide 11 is 230 turns, and the coil corresponding to the other printing wire is 250 turns and both coils are set to the same apply voltage and the same drive time. when the same drive voltage is applied, the coil resistance and inductance of the coil of 230 turns becomes lower correspondingly to the reduction in the number of the winding, and the rising of a current becomes step and printing force increases by about 20%. Therefore, the increase in printing force can be achieved easily and inexpensively, and the operational deterioration due to magnetic interference, the lowering in the printing forces of the printing wires arranged to the end part of the leading end guide or in the vicinity thereof, and the increase in an operation time are eliminated, and printing grade and stability can be enhanced. |
