Effect of Ballast Mass Variation on A 2-Stage Type Sand Sieving Machine

Abstract

The sand sieving machine is designed with the aim of separating the grain size from the sand that will be used in the manufacture of building material mix. The sieve is used in 2 sizes by arranging in layers. This study aims to analyze the effect of the variation of the ballast mass on the resulting vibration. The masses of the ballast tested were 480 grams, 740 grams, and 980 grams.The focus of the study is on the effect of the use of ballast with these three variations on acceleration and displacement to find the vibration frequency value. The second focus is on the influence of engine rotation which is set with the same RPM but when a ballast is installed, it will experience a change in the weight of each ballast. Data collection was carried out by preparing a double-decker sand sifting machine and testing its movement first before adding a ballast. The data recorded was in the form of the initial rotation of the motorcycle, then a 480-gram ballast was installed, the rotation of the motorcycle after adding the ballast was recorded from the tachometer and acceleracy and the displacement was recorded from the vibration tester meter. The data obtained were analyzed to determine the correlation between the mass of the ballast and vibration, as well as to evaluate how the change in the rotational speed of the machine affects the performance of the sand sieving machine with different ballast masses. The results show that the mass of the ballast has a significant impact on the vibration characteristics of the machine. The larger mass of the ballast tends to produce vibrations of higher intensity, which can affect the efficiency of the sand filtration process. In addition, variations in engine rotation also affect engine performance, with different ballast weights showing different responses to changes in rotation speed. These findings provide important insights for optimizing the design and operation of sand sieving machines, in order to improve efficiency and effectiveness in the separation of granular materials.