Patent ID: 8970156
Filing Date: 2015-03-03
Classification: G05B,Y10T

Abstract:
1. A path display apparatus that displays a path of a tip point of a tool of a machine tool, to which correction data including backlash correction and pitch correction is applied, that controls the position and posture of the tool by a plurality of drive axes, the path display apparatus comprising: a position command acquiring unit that acquires a first position command, generated by a numerical control apparatus, for a plurality of motors that drive the plurality of drive axes, respectively; a position feedback acquiring unit that acquires first position feedback of each of the plurality of motors, from a plurality of position detectors that detect the respective positions of the plurality of motors every predetermined control cycle; a correction data acquiring unit that acquires correction data generated for each of the plurality of motors; a position command calculating unit that subtracts the correction data from the first position command to calculate a second position command; a position feedback calculating unit that subtracts the correction data from the first position feedback to calculate second position feedback; a command path display unit that displays a command path of the tip point of the tool, based on the second position command calculated by the position command calculating unit; and a feedback path display unit that displays a feedback path of the tip point of the tool, based on the second position feedback calculated by the position feedback calculating unit.