| 摘要 |
PURPOSE:To perform the centering accurately in a short time without skill, by performing the centering of a punch of a retaining ring by using a punch center measuring device having a displacement sensor attaching ring. CONSTITUTION:The attaching ring 41 for the displacement sensors 42a-42d is provided, and its outer diamter is made to equal to the outer diameter of the retaining ring to be centered. The displacement sensors 42a-42d are fixed so that they are symmetrical with respect to the center of the attaching ring 41, and they are spaced at 90 deg. one another. Amplifiers 43a-43d are provided in correspondence with the sensors 42a-42d, respectively. In an subtracting circuit 44, subtraction between the outputs of the amplifiers 43a and 43b and subtraction between the outputs of the amplifiers 43c and 43d are performed. The output of the subtracting circuit 44 is inputted to a microcomputer 46 through an AD converter 45, and the computed result is outputted to a printer 47. |
