US 5,297,023 A · NC data editing method using transformation matrix and conversion command

Abstract

An NC data editing method speedily and accurately edits NC data, e.g., for modification of the movement path of a controlled object. When three positional conversion command blocks are successively read from original data in a data conversion process following a data modification process, a position transformation matrix is calculated based on coordinate value data for three sets of reference points and corresponding points in the blocks (S211). For a mirror conversion command block, a mirror transformation matrix is calculated based on coordinate value data for two points stated in the block (215). An up-to-date composite transformation matrix is obtained by multiplying a previous composite transformation matrix by a now calculated transformation matrix (S213). Each time a movement command block is read, post-positional-conversion or post-mirror-conversion command point data is obtained by multiplying movement command point data in each block by the up-to-date composite transformation matrix (S217). When a conversion command cancellation block is read, a new composite transformation matrix is obtained by multiplying the up-to-date composite transformation matrix by an inverse matrix of the most recent transformation matrix (S218), so that only the conversion process associated with the most recent transformation matrix is canceled. After all the data blocks are converted, tool paths are drawn based on the converted data for an operator's inspection. NC data editing ends when a desired tool path is obtained and approved by the operator.

Claims10

Dependent claims

An editing method for n-dimensional numerical control commands, comprising the steps of:

(a) adding to the n-dimensional numerical control commands a positional conversion command composed of a positional conversion command code, reference coordinate value data indicating a group of n reference points which are permitted to be arbitrarily set, and corresponding coordinate value data indicating a group of n corresponding points in one-to-one correspondence with the group of n reference points;
(b) adding a conversion cancellation command to the n-dimensional numerical control commands;
(c) automatically calculating and storing a transformation matrix when the conversion command is read from the n-dimensional numerical control commands;
(d) converting an input point associated with a movement command using the transformation matrix, thereby automatically obtaining a post-conversion point, for every movement command read from the numerical control commands, until the conversion cancellation command is read, after the transformation matrix is stored in step (c);
and
(e) automatically rewriting the n-dimensional numerical control commands to produce rewritten numerical control commands using the post-conversion point.

3 more elements

An editing method for first through fourth n-dimensional numerical commands, comprising the steps of:

(a) adding to first through fourth n-dimensional numerical control commands a positional conversion command composed of a positional conversion command code, reference coordinate value data indicating a group of n reference points which are permitted to be arbitrarily set, and corresponding coordinate value data indicating a group of corresponding points in one-to-one correspondence with the group of n reference points;
(b) adding a conversion cancellation command to the first through fourth n-dimensional numerical control commands to cancel the positional conversion command;
(c) automatically calculating and storing a transformation matrix when the conversion command is read from the first through fourth n-dimensional numerical control commands;
(d) converting an input point associated with a movement command using the transformation matrix, thereby automatically obtaining a post-conversion point, for every movement command read from the first through fourth n-dimensional numerical control commands, until the conversion cancellation command is read, after the transformation matrix is stored in step (c);
(e) automatically rewriting the first through fourth n-dimensional numerical control commands to produce rewritten numerical control commands using the post-conversion point;
(f) adding, before said adding in step (b), a mirror conversion command composed of a mirror conversion command code and n-dimensional coordinate value data indicating two points for assigning a straight line extending perpendicularly to a mirror plane and having a middle point thereof at which the mirror plane is located;
and
(g) adding, after said adding in steps (a) and (f) and before said adding in step (b), a conversion cancellation command cancelling the mirror conversion command added in step (f).

5 more elements

Dependencies are inferred from the claim text.

NC data editing method using transformation matrix and conversion command

Life of this patent

NC data editing method using transformation matrix and conversion command

Life of this patent

Abstract

Claims10