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    • 3. 发明授权
    • Printer control system
    • 打印机控制系统
    • US4293233A
    • 1981-10-06
    • US114561
    • 1980-01-23
    • Mark H. Hoffman
    • Mark H. Hoffman
    • B41J1/24G05B19/39B41J1/30
    • B26D7/086B41J1/24G05B19/39G05B2219/34215G05B2219/41123G05B2219/42104G05B2219/42114G05B2219/42171G05B2219/42237G05B2219/43107G05B2219/43194
    • The intermittent movement of the printer's carriage and "daisy"-type print wheel is controlled by a relatively simple, reliable digital control system. The difference between the desired velocity and the actual velocity of each member is measured digitally. This difference constitutes an error signal which is used to retrieve stored values of acceleration or deceleration corresponding to various values of the error signal. These values are used to develop a corresponding electrical signal which is used to accelerate or decelerate the member to reach the desired velocity. A relatively simple circuit is provided for reliably returning the carriage or print wheel to a desired position after overshooting the position, despite a relatively large amount of overshoot. Simple, low-power-consumption holding or drive circuits utilizing pulsed voltages are provided for the stepping motors used for ribbon feed and line feed, and for the solenoids used for ribbon shift, print wheel shift and print hammer energization. Digital control of the print hammer intensity is provided by controlling the duty cycle of the hammer energization signals in accordance with intensity values stored in memory.
    • 打印机托架和“菊花”型打印轮的间歇运动由相对简单,可靠的数字控制系统控制。 以数字方式测量每个成员的所需速度和实际速度之间的差异。 该差异构成了用于检索对应于误差信号的各种值的加速度或减速度的存储值的误差信号。 这些值用于开发相应的电信号,该电信号用于加速或减速器件达到所需速度。 提供了一种相对简单的电路,用于在超过位置之后将滑架或打印轮可靠地返回到所需位置,尽管相对较大量的过冲。 为用于色带供给和换行的步进电机以及用于色带位移,打印轮移动和打印锤通电的螺线管提供了采用脉冲电压的简单,低功耗的保持或驱动电路。 通过根据存储在存储器中的强度值控制锤激励信号的占空比来提供打印锤强度的数字控制。
    • 6. 发明授权
    • Printer control system
    • 打印机控制系统
    • US4226546A
    • 1980-10-07
    • US967090
    • 1978-12-06
    • Mark H. Hoffman
    • Mark H. Hoffman
    • B41J1/30B41J1/24G05B19/39G06K15/08H04L17/16G05B19/24
    • B26D7/086B41J1/24G05B19/39G05B2219/34215G05B2219/41123G05B2219/42104G05B2219/42114G05B2219/42171G05B2219/42237G05B2219/43107G05B2219/43194
    • The intermittent movement of the printer's carriage and "daisy"-type print wheel is controlled by a relatively simple, reliable digital control system. The difference between the desired velocity and the actual velocity of each member is measured digitally. This difference constitutes an error signal which is used to retrieve stored values of acceleration or deceleration corresponding to various values of the error signal. These values are used to develop a corresponding electrical signal which is used to accelerate or decelerate the member to reach the desired velocity. A relatively simple circuit is provided for reliably returning the carriage or print wheel to a desired position after overshooting the position, despite a relatively large amount of overshoot. Simple, low-power-consumption holding or drive circuits utilizing pulsed voltages are provided for the stepping motors used for ribbon feed and line feed, and for the solenoids used for ribbon shift, print wheel shift and print hammer energization. Digital control of the print hammer intensity is provided by controlling the duty cycle of the hammer energization signals in accordance with intensity values stored in memory.
    • 打印机托架和“菊花”型打印轮的间歇运动由相对简单,可靠的数字控制系统控制。 以数字方式测量每个成员的所需速度和实际速度之间的差异。 该差异构成了用于检索对应于误差信号的各种值的加速度或减速度的存储值的误差信号。 这些值用于开发相应的电信号,该电信号用于加速或减速器件达到所需速度。 提供了一种相对简单的电路,用于在超过位置之后将滑架或打印轮可靠地返回到所需位置,尽管相对较大量的过冲。 为用于色带供给和换行的步进电机以及用于色带位移,打印轮移动和打印锤通电的螺线管提供了采用脉冲电压的简单,低功耗的保持或驱动电路。 通过根据存储在存储器中的强度值控制锤激励信号的占空比来提供打印锤强度的数字控制。