Soybeans are a crop that can be utilized especially in terms of food rich in protein and fat as the human and animal needs. For using the soybeans must be processed to obtain the desired physical characteristics. The process is mostly a grinding and extraction. However these two processes are completely different applications. This research aims to study and create the soybeans grinder machine become to flour the quantity of grinding the variable that affect to the amount of grinding and economic analysis for guiding to investment. The researchers have designed the grinder unit by the coarse grinding and mill grinding unit. For the coarse grinding unit is similar to a disc and in case of grinding mill will be used the roller set. Base on the power train of bolt grinding unit the electric motor with 2 HP. at 1450 RPM are used for the experiment. For the grinding mil process the rough material is feed into grinding mil chamber for reduce the size of material become to the flour. The results of the research found that the suitable speed of the coarse grinding and mill grinding unit was 480 and 725 RPM respectively. In case of these relationships the average quantity of grinding for the coarse grinding and mill grinding unit was 271.8 and 150 kglhr respectively. Furthermore the results of experiment discover the materials that are not accounted of the coarse grinding for 13.9 percent. For the economic analysis for guiding to investment found that the breakeven point and pay-back period was 110378 kg and 0.0067 year respectively.

The purpose of this research is to improve the pepper mill for increasing performance. The characteristic of the pepper mill is a trapezoid shape. The structure is made of angle steel and stainless steel sheet. The motor used a power unit is 1 hp and send the power to the driving belt for driving the disc. There are new pattern of designed discs. The discs are made from stainless steels and have three different patterns on the surface of discs. Each test must measures the moisture contented of the pepper seeds. If the moisture is less than 9% can be milled. However if the moisture is more than 9% that must be taken pepper seeds to sunning or drying. The test is 10 sets in each set of test using two samples of pepper seeds. In each test pepper seeds must be weighted before the milling when they are milled the finish. After that they are brought the milled pepper seeds to a weight and separated a size. The sorting by size is 5 sizes as a less than 5 microns 150-250 microns 250-425 microns 150 microns 425 to 1000 and more than 1.00 mm. The results of research shown that pattern of discs will give the different pepper powder sizes