公开(公告)号：US3911814A

公开(公告)日：1975-10-14

申请号：US47026974

申请日：1974-05-15

申请人： DATA PRODUCTS CORP

发明人： HELMS CLIFFORD J ,  SKINNER DONALD K ,  STUPECK DONALD G

IPC分类号： B41J9/12 ,  B41J9/14 ,  G06K15/06

CPC分类号： B41J9/14 ,  B41J9/12

摘要： A hammer bank system for use in a high speed impact printer includes a movable hammer bank in which the hammer spacing is twice the character spacing. A hammer bank controller is used to move the entire hammer bank between two selected hammer bank positions. In one hammer bank position, the hammers are aligned with odd character positions and in the other hammer bank position, the hammers are aligned with the even character positions. The hammer bank controller in response to a move command signal from the printer logic section drives the hammer bank (in a velocity mode) from one of its positions to the other first at an increasing velocity, followed by a constant velocity, until the bank is at a selected distance from the desired position, at which time the hammer bank velocity is decreased to zero and the hammer bank is substantially at the desired position. The controller switches to a position mode in which a position signal is used in a position servo loop to lock the hammer bank at the desired position. In normal operation when the bank is switched to the position mode, a move complete signal is fed back to the printer logic section to terminate the move command signal. Positioning initialization circuitry is also included to automatically drive the hammer bank to one of its desired positions.

摘要翻译： 用于高速冲击打印机的锤击系统包括一个可移动的锤组，其中锤间距是字符间距的两倍。 锤子组控制器用于将整个锤子组移动到两个选定的锤子位置之间。 在一个锤组位置，锤子与奇怪的字符位置对齐，而在另一个锤击位置中，锤子与偶数字符位置对准。 响应于来自打印机逻辑部分的移动命令信号的锤片组控制器以增加的速度将锤组（以速度模式）从其一个位置首先驱动到另一位置，然后以恒定速度驱动，直到该组是 在距离期望位置的选定距离处，此时锤击组速度减小到零，锤组基本处于所需位置。 控制器切换到位置模式，其中在位置伺服回路中使用位置信号以将锤组锁定在期望的位置。 在正常操作中，当存储体切换到位置模式时，移动完成信号被反馈到打印机逻辑部分以终止移动指令信号。 还包括定位初始化电路以自动将锤组驱动到其所需位置之一。