Also known as surface roughness roughness

Also known as surface roughness sealed angular contact ball bearing, surface finish instrument, surface roughness tester, roughness tester, roughness tester, roughness tester, and other names, the first overseas R & D and later introduced the country. When the roughness of the surface roughness measurement, the sensor on the measured surface of the workpiece, driven by the drive mechanism inside the instrument sensors do constant glide along the surface to be measured, the sensor through the built-in stylus feel sharp measured surface roughness degrees, then the measured surface roughness of the workpiece caused by a displacement of the stylus, the amount of displacement of the inductance of the sensor coil changes the inductance, the measured surface roughness to generate an analog signal proportional to the output of the phase-sensitive rectifier, after the signal is amplified and level conversion into the data acquisition system.