| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a difference of dynamic characteristics generated after printing hammers are released from an adhesion state due to a difference of a magnetic flux in turning in cores even if a static excess attraction force and a spring constant are uniformed in the printing hammers arranged in N arrays perpendicularly to a printing line. SOLUTION: Noting that the problem is caused by a difference of pull-back forces of printing hammers after released because of the difference of the magnetic flux in turning in cores, a control condition is switched for each of the N arrays thereby uniforming the pull-back forces.
|
