PROBE SHIFTING DEVICE OF COORDINATE MEASURING INSTRUMENT

摘要

PURPOSE:To facilitate an easy backward shift of a probe from outside and at a point of measurement which cannot be viewed by eyes, by using the same route for both the backword movement and the contact after a contact of the probe. CONSTITUTION:A contact route speed storage circuit 34 stores a prescribed amount of speed of the contact route through which a probe 14 touches an object 12 to be measured. A backward route speed commanding circuit 26 delivers the backward route speed signal 102 by an amount equivalemt to the prescribed backward shift and based on the contact route speed when the probe shifts backward. A reversing circuit 28 reverses the direction signal 104 within the circuit 34. a backward shift trigger circuit 58 supplies the backward shift trigger signal 106 to both circuits 26 and 28 based on the touch signal 100 of the probe 14. Thus the probe 14 is shifted backward from the object 12 along the same route as the contact route after the probe 14 touches the object 12.