DESIGN AND DEVELOPMENT OF SURFACE ROUGHNESS TESTER

In almost all manufacturing processes, surface roughness plays an important role for the assessment of quality of the product. In any manufacturingprocess, an estimationof the surface roughness is especiallyimportant. Some of these methods have sunk without any trace, because of the inherent disadvantages. In other cases, some additional methods have been developed to deal with different measurement problems. The roughness of a surface cannot be easily defined by a single parameter or by any intrinsic property of the surface. The surface irregularityexists in two primaryplanes; one at the right angle of the surface, which is characterized by the some kind of height, and second in the plane of the surface, which is characterized by some kind of wavelength. Thus, there are two sets of limitations to each roughness measuring instrument or technique; (i) The largest and nominaldifference of heights, which it will resolve and (ii) The longest and shortest wavelengths