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US 5,955,856 AGranted
Numerical control apparatus and method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTomonori Sato, Takashi Iwasaki, Teiji Takahashi
Life of this patent
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Abstract
A numerical control apparatus and a numerical control method is provided which permit high-accuracy and high-velocity travel at a joint between paths as well as simple and rapid calculations for this purpose. A path is inserted at the joint between the paths so as to achieve a continuous curvature.
Claims25
A numerical control apparatus for determining a travel path of an object, the apparatus comprising:
- a numerical control program interpreter for reading instructions in a numerical control program and outputting first and second adjacent travel paths, wherein a joint creating a discontinuity in at least one of curvature and acceleration exists between the first and second travel paths;
- a joint correcting section coupled to said numerical control program interpreter for receiving a correction range indicative of a portion of the first and second travel paths to be corrected and an allowable error value indicative of a permissible deviation from the first and second travel paths, and for outputting a third travel path replacing the joint, based on the first and second travel paths, the correction range, and the allowable error value, wherein the third travel path has continuous curvature and acceleration;
- and
- an interpolation-acceleration/deceleration section coupled to said joint correction section and receiving the third travel path, for outputting instructions to a servo amplifier for controlling the travel path of an object based on the third travel path.
1 more element
A numerical control method comprising:
- receiving, at a numerical control program interpreter, instructions in a numerical control program for controlling a travel path of an object, and outputting first and second adjacent travel paths for the object based on the instructions, wherein a joint comprising a discontinuity in curvature exists between the first and second travel paths;
- receiving, at a joint correcting section, the first and second travel paths and outputting a third travel path based on the first and second travel paths, a correction range indicative of a portion of the first and second travel paths to be corrected, and an allowable error value indicative of a permissible deviation from the first and second travel paths, the third travel path being continuous in curvature and acceleration with the first and second travel paths;
- and
- receiving, at an interpolation-acceleration/deceleration section coupled to said joint correction section, the third travel path and outputting instructions to a servo amplifier for controlling the travel path of the object based on the third travel path.
1 more element
Dependencies are inferred from the claim text.