| 摘要 |
PURPOSE:To prevent the generation of cutter mark and excessive stock removal at three-dimensional corner by a method wherein the tool center is rendered to travel on the curve smoothly connecting the tool center loci before and after the point at the three-dimensional corner. CONSTITUTION:An unit offset vector Vi is compensated so that the tool center travels along the curve, which smoothly connects to the respective tool center loci before and after the point at the three-dimensional corner P1'Ps and PeP2'. Concretely, Z-axis veriations are controlled to be small near the start point Ps and the final point Pe while Z-axis increments are controlled to be large during the travel between said two points. The X-, Y- and Z-axis increments DELTAx, DELTAy and DELTAz are determined from the coordinates of a tool center Pi' to the coordinates of a tool center ahead by one step and the tool center is shifted on the basis of the increments DELTAx, DELTAy and DELTAz. Hereafter, the tool center moves from the start point Ps to the final point Pe of the corner in a smoothly changing manner by similarly repeating steps from i=1 to i=n. |
