Long Distance Microscope for Measurement of Tool Shape in High Precision X-Y Turning

摘要

The problems of out of roundness, wear, and cracking of cutting tools used in high precision x-y-turning is solved by a variable magnification microscope. This is built by a long distance microscope lens and a variable magnification TV lens coupled to a CCD-camera, frame grabber and computer. Resolution below 1 micrometer is achieved. Wear, cracking and built up cutting edge can easily be detected, form measurement takes some more effort. This microscope is fixed to the machine frame thus establishing a machine Null. The tool is moved by the x-y drive of the machine to any inspection position. As the field of view is limited images from tools bigger than 0.5 mm have to be stitched to give a complete image.