Automatization Roaster Hopper Coffee

Abstract

The process of roasting coffee is to maintain the process of reducing the water content of coffee beans at temperatures of 200-230˚C, while for the weight of roasted coffee depends on the length of time. In this study, we will build an automatic coffee roaster machine with 1kg capacity with a roasting time of 30 minutes. From the manufacturing process results in a reduction in water content in coffee beans weighing 200 grams. This study aims to build an automatic coffee roaster machine that works better than a manual coffee roaster machine, which is found in some coffee beans that become charcoal and requires the machine operator every 10 minutes to see the color of the coffee beans when roasted. This automatic coffee roaster machine uses a heater using a LPG (Liquid Petroleum Gas) stove, the power of the coffee roaster player using an electric motor 0.1864kW and 50rpm shaft rotation. Microcomputer control uses Arduino Uno R3, 12-24 volt relay, LM35 temperature sensor, servo motor and 2 swap programmable drive mechanism. This study includes a case study of manual coffee roaster by building a 1 kg coffee roaster machine, automating coffee bean inlet based on roasting room temperature, automating roasted rotation, automating the coffee bean outlet based on roasting time. From the automation that has been made the machine can operate in a timely manner and is able to produce shrinkage of 0.2 kg of moisture content lost in the roasting process of coffee.