| 摘要 |
PURPOSE:To enable measurement with high accuracy ver the entire width of an object to be measured by decreasing the scanning speed of a measuring head which is moved back and forth in the transverse direction of said object near both ends of the object and increasing the time constant of the response characteristic thereof. CONSTITUTION:The 2nd position setter 50 which sets a speed change point is provided to an external controller which controls a scanning motor 18 provided to move back and forth a measuring head of a thickness gage 16. Two kinds of adjusting values for the time constant in a time constant adjusting circuit 32 are set and the adjusting content of the circuit 32 is automatically changed over according to the change-over of the speed change point. The 2nd position setter 50 sets the low speed scanning range of a prescribed size X on the side respectively inner from both ends of an object 10 to be measured. The pitch of the measuring profile in the low speed scanning range is thus made fine and the measuring accuracy is improved. |
