| 摘要 |
PURPOSE:To provide efficiently desired parts with a series of copying control by moving a tracer head on the curved surface of an imaginary model when the imaginary model is combined with an actual model and the tracer head copying the actual model reaches the imaginary model. CONSTITUTION:A tracer head TC moves in the directions of +X axis and -Z axis while copying an actual model RMDL and when a position monitoring circuit judges that the head TC reaches an imaginary model IMDL, it generates signal RIM and the count value N of a counter 108a becomes 2 so that a gata circuit 108c converts voltage signal to X axis feed speed Vx and generates the voltage signal as Z axis feed speed Vz. Next, a pulse distributer takes in the present position of X, Z axes in the generation of signal RIM as arcuate start pointing coordinate, while carrying out arc interpolation calculation so that the distributed pulse error register of each axis from the pulse distributer and Z generate the difference between a commanding amount and actual one, and a DA converter and Z generate the speed signals. |
