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    • 31. 发明公开
    • Backlash compensation method and apparatus
    • 背光补偿方法和装置
    • EP0077655A3
    • 1984-09-19
    • EP82305488
    • 1982-10-15
    • FANUC LTD
    • Fukuyama, HiroomiIsobe, Shinichi
    • G05B19/23
    • G05B19/23G05B19/232G05B2219/41038
    • A method and apparatus for compensating for backlash in a machine tool, utilising the steps of issuing a command for selecting one of first and second backlash compensation modes, storing in memory the selected backlash compensation mode, discriminating whether the direction of movement of a movable element of the machine tool has reversed along at least one axis, completing a cutting operation based on a command in a currently prevailing block of data if the first backlash compensation mode is the selected mode when there is a reversal in the direction of movement along at least one axis, thereafter compensating for backlash prior to the start of a cutting operation based on a command in the next block of data, and subsequently performing the cutting operation based on the command in the next block of data, and compensating for backlash, at the same time the movable element is travelling, based on a command in a currently prevailing block of data if the second backlash compensation mode is the selected mode when there is a reversal in the direction of movement along at least one axis.