The purpose of this project is to determine the structure of the metal without people in polishing that make we can reduces cost of worker and time to preparing work pieces. This project develop from slider crank and hack saw. After the machine was designed and constructed, we will test the performance of the machine by measured the surface roughness and measured from microscopic images.
The test result shows that each work piece has polished in the same direction. However, the polishing by last number of sandpaper make the work piece has average Ra equal to 0.095 μm and average RZ equal to 0.826 μm. This result is greater than the measured values from the work piece polishing by hand. As a result, this project will not be able to use 100% and need further development.