Coffee roasting machines look simple but are hard to operate. They are large machines with a grill on the bottom. Two prongs keep moving round to keep the coffee from burning. Below the grill are the heaters. They provide the right temperature through a control switch and adjuster. Above the grill is the hamper which feeds the coffee beans into the roaster.
This sounds easy till now. This is where the art of roasting comes in. To see if the right amount of coffee beans are there. If the temperature is right for the coffee beans that are there and the coffee beans are roasted just perfectly. Otherwise the coffee could be bitter or harsh. It takes years of work to get everything right. That is when it appears that this job is as simple as it looks.
Coffee roasting machines come in different sizes. But they all operate the same way.