Sieve Controlled Model Innovation in Coffee Bean Grinder for Increased Coffee Powder Productivity and Quality

Abstract

Problems felt by coffee farming business groups caused by declining demand for coffee in the market due to falling market confidence in the process carried out are still conventional, partner problems are 1) unable to produce their own ground coffee due to the absence of machines, 2) coffee processing is still too long, namely grinding raw coffee, washing, drying and do not have a ground coffee maker,  3) Low knowledge of coffee processing to produce coffee needed by the market. The purpose of this activity is to increase the income of coffee farmer groups through higher coffee selling values, of course, with better quality coffee beans and powders. The result of this community service activity is a coffee bean grinding machine that can grind coffee beans as much as 15 kg / hour, while the grinding process is carried out in 3 stages using 500 gr coffee beans / process, where stage 1 uses a rotation speed of 725 Rpm to obtain the quality of fine coffee powder by 60% and coarse powder by 40% which takes 8.5 minutes,  Stage 2 rotation speed of 850 rpm produces 75% fine powder, 25% coarse powder takes 6 minutes, stage 3 rotation speed of 1300 rpm produces 82% fine coffee powder, and 18% coarse powder takes 3 minutes. The community is very happy with the help of this coffee bean grinding machine, where the plantation products they get are no longer all given to middlemen or factories