COFFEE ROASTER:
1.programmable logic controller(PLC)-
it can memorize 20 ways of
roasting methods set by user.
The user can roast by setting
timer,temperature orboth.
2.human/computer interface(HMI)-
just control by touch on computer
screen.
3.electrical meallic tubing(EMT)-
avoid damsge from rat.
4.temperature of input gas and coffee
grain can be shown all the time.