| 摘要 |
PURPOSE:To maintain desired machining accuracy and to achieve high machining efficiency by controlling the feeding speed such that the absolute value of error signal will fall within predetermined range. CONSTITUTION:A tracer head 6 will produce displacement signals epsilonx, epsilony, epsilonz corresponding with the displacements in the directions of X, Y and Z axes of a stylus 7 movable while contacting with a model 8 to obtain a synthetic displacement signal epsilon in a displacement synthesizer 11 while to obtain the displacement direction signals sintheta, costheta in an indexing circut 12. In an adder 13, the signal epsilon is added with a referential displacement signal epsilono to be applied through D/A converter 23 to produce an error signal DELTAepsilon while speed operating circuits 14, 15 will produce the normal and tangential speeds VN, VT respectively and a distribution circuit 16 will produce a command speed signal on the basis of the speeds VN, VT and the signals sintheta, costheta and apply onto an amplifier selected through a gate 17 to drive the model 8 thus to feed the tracer head 6 and a cutter 9 integrally. |
