| 摘要 |
PURPOSE:To increase a printing speed and to enhance reliability, by arranging a pair of hammer banks mutually swingable in opposite directions and setting off the inertia between both hammer banks. CONSTITUTION:The edge positions of both upper and lower hammer banks 1A, 1B are detected by edge sensors 14A, 14B, 15A, 15B and an edge detector 16 and a current supply signal is sent to a movable coil type linear motor driving part 18 through a movable coil type linear control part 17. Amplified equal currents are flowed to both linear motors 4A, 4B and, when the winding directions of both upper and lower movable coils are made reverse, forces in mutually reverse directions are generated in a same specification magnetic circuit. |
