Abstract: A method and apparatus for NC machining management based on a measurement program, wherein a machining shape at an arbitrary machining stage is determined by an NC program, a geometric element or a geometric model is generated, and a measurement program is generated on the basis of the geometric model. The measurement program is executed when at least one of the steps of the NC program is completed, and the results of measurement are used as control information for machining measurement.

Abstract: The present invention relates to a system and method therefor of sorting and unloading various pieces cut from sheet blanks which have different dimensions in a sheet metal fabricating environment. To achieve this end, prior to the production run, the various program routines whose operations for effecting the cutting of the sheet blanks are retrieved and the data relevant to the to be cut pieces are grouped and analyzed so that pieces of different dimensions cut in accordance with the different program routines are respectively allocated to the corresponding sorting addresses for unloading. Accordingly, different pieces with the same dimension cut from different program routines during the same production run are unloaded to the same location of the unloader area. Optimization of the unloading process and optimal utilization of the available loading space are thereby achieved.

Abstract: Native code for a CNC stitching machine is generated by generating a geometry model of a preform; generating tool paths from the geometry model, the tool paths including stitching instructions for making stitches; and generating additional instructions indicating thickness values. The thickness values are obtained from a lookup table. When the stitching machine runs the native code, it accesses a lookup table to determine a thread tension value corresponding to the thickness value. The stitching machine accesses another lookup table to determine a thread path geometry value corresponding to the thickness value.

Abstract: Actual machining positions P1, P2, . . . corresponding to command positions S1, S2, S3 . . . of each block of NC data are obtained by trial machining. Positions that correspond symmetrically to the actual machining positions P1, P2, . . . with respect to the command positions S1, S2, S3 . . . of each block are obtained. Modified NC data are created with use of the symmetrical positions as modified command positions for each block. The modified NC data include correction values for modifying positional differences attributable to a delay in a servo system. Therefore, if machining is carried out in accordance with the modified NC data, the correction values and a follow-up delay attributable to the actual delay in the servo system cancel one another, so that a high-accuracy work shape can be obtained.