3D-trajectory display device for machine tool
First Claim
1. A trajectory display device adapted to display a three-dimensional trajectory of an actual position of an object, the three-dimensional position of the object being controlled by a numerical controller, the trajectory display device comprising:
- a commanded position data obtaining part adapted to obtain data of a commanded position of the object at discrete time intervals;
an actual position data obtaining part adapted to obtain data of an actual position of the object at discrete time intervals;
a command line segment defining part adapted to define a command line segment which connects two temporally adjacent points, in relation to each point corresponding to the commanded position at discrete time intervals;
an error calculating part adapted to calculate an error of the actual position relative to a commanded trajectory, the error being determined as a shorter one between (i) a length of a shortest normal line among normal lines each extending from the actual position at discrete time intervals to the command line segment at each discrete time and (ii) a length of a line segment extending from the actual position at discrete time intervals to a commanded position which is the nearest from the actual position; and
at least one of an error displaying part adapted to display the error and an outputting part adapted to output the error to the outside.
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Accused Products
Abstract
A trajectory display device capable of correctly quantifying an error of a three-dimensional trajectory of a machine tool, and displaying or outputting the error. The trajectory display device has a command line segment defining part adapted to define a command line segment which connects two temporally adjacent points, in relation to each commanded position; an error calculating part adapted to define a normal line extending from the actual position to each command line segment and calculate an error of the actual position relative to a commanded trajectory, the error being determined as a shorter one between a length of a shortest normal line among the defined normal lines and a length of a line segment extending from the actual position to a commanded position which is the nearest from the actual position.
13 Citations
5 Claims
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1. A trajectory display device adapted to display a three-dimensional trajectory of an actual position of an object, the three-dimensional position of the object being controlled by a numerical controller, the trajectory display device comprising:
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a commanded position data obtaining part adapted to obtain data of a commanded position of the object at discrete time intervals; an actual position data obtaining part adapted to obtain data of an actual position of the object at discrete time intervals; a command line segment defining part adapted to define a command line segment which connects two temporally adjacent points, in relation to each point corresponding to the commanded position at discrete time intervals; an error calculating part adapted to calculate an error of the actual position relative to a commanded trajectory, the error being determined as a shorter one between (i) a length of a shortest normal line among normal lines each extending from the actual position at discrete time intervals to the command line segment at each discrete time and (ii) a length of a line segment extending from the actual position at discrete time intervals to a commanded position which is the nearest from the actual position; and at least one of an error displaying part adapted to display the error and an outputting part adapted to output the error to the outside. - View Dependent Claims (2, 3, 4, 5)
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Specification