Keep in mind the machines are not usually computerized; but when teaching classes especially children and teens, I had them turn off the machines whenever they got up from them to go iron, cut etc. It was a safety issue. I also reminded them to At home, sewing without students my iron and machines are on until I quit. However, if I have to go upstairs for any reason; I turn everything off on my way out because I have a tendency to get side tracked as well. hehehe Teresa