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    • 2. 发明授权
    • Process for controlling the operation of a print head
    • 控制打印头操作的过程
    • US5219233A
    • 1993-06-15
    • US730875
    • 1991-09-11
    • Ralph BauerleDietmar KottwitzMichael BlumeJoachim Schwarzkopf
    • Ralph BauerleDietmar KottwitzMichael BlumeJoachim Schwarzkopf
    • B41J19/18B41J2/30B41J2/51B41J19/20B41J29/38B41J29/46
    • B41J29/38B41J19/202
    • A process for controlling the operation of a printing head detects defects in the transport of the printing head along a printed line and if necessary corrects them. A control unit (24) controls a current source (16) which supplies current to a transport motor (12) which moves the printing head (10). The printing elements (14) of the printing head (10) are supplied with pulsed drive current (ID) by a driver component (18). A position indicator (20) records the distance travelled by the printing head (10) along a printed line. According to the invention, the transport time between two printing positions is monitored to detect whether a limit value (G) is exceeded. If the limit value (G) is exceeded, the drive of the printing head (10) is stopped and if necessary the printing head is moved in the opposite direction and/or at least one printing element (14, 15) is operated with less energy that that required for printing. As a result of these measures, a defect due to adhesion of a printing element (14) to a printing ribbon can be detected and eliminated automatically.
    • PCT No.PCT / EP90 / 00056 Sec。 371日期1991年9月11日 102(e)1991年9月11日PCT PCT 1990年1月10日PCT公布。 出版物WO90 / 08039 日期1970年7月26日。用于控制打印头的操作的处理检测打印头沿着印刷线的传送中的缺陷,并且如果需要的话更正它们。 控制单元(24)控制向移动打印头(10)的运送马达(12)供给电流的电流源(16)。 打印头(10)的打印元件(14)由驱动器部件(18)提供脉冲驱动电流(ID)。 位置指示器(20)记录打印头(10)沿印刷线行进的距离。 根据本发明,监视两个打印位置之间的传送时间,以检测是否超过限制值(G)。 如果超过限制值(G),则停止打印头(10)的驱动,并且如果需要,打印头沿相反方向移动和/或至少一个打印元件(14,15)以较少的操作 印刷所需的能量。 作为这些措施的结果,可以自动检测和消除由于打印元件(14)与印刷色带的粘合而引起的缺陷。