DIRECTION REVERSING CONTROL FOR A MACHINE CONTROL SYSTEM,申请号USD3671827-传众专利搜索

DIRECTION REVERSING CONTROL FOR A MACHINE CONTROL SYSTEM

申请公布号：US3671827(A)

申请号：USD3671827

申请日期：1970.11.27

申请公布日期：1972.06.20

申请人：

HARRIS-INTERTYPE CORP.

发明人：RICHARD G. FOLEY;JAMES E. MURRAY

分类号：G05B19/16;(IPC1-7):G05B19/02

主分类号：G05B19/16

摘要：A machine control system, such as a control for a paper cutting machine, is provided for purposes of reversing the direction of travel of a movable member, such as a back gauge in a paper cutting machine, driven by a reversible motor between forward most and rearward most positions relative to a work station. A control record has two spaced marks recorded thereon for defining the forward most and rearward most positions. A mark sensor serves to sense the marks and in response to each mark provides a reverse signal pulse. Relative motion is provided between the control record and the sensor proportional to the velocity of the movable member. A memory is actuated to one of two stable states in dependence upon the direction the movable member is traveling when a reverse mark is sensed. The commanded condition of the memory together with the occurrence of a reverse signal pulse generated in response to the sensed reverse mark, causes the motor to reverse and drive the movable member in the opposite direction. In addition, circuitry is provided to prevent the motor from reversing in response to a reverse mark when the movable member is traveling in a backward direction until a position command signal, also recorded on the control record, is sensed by a second sensor.