How an Espresso Coffee Maker Works The machine is simple to use, but it requires precision when grinding beans and tamping them. It also takes an extended time to warm up. Chris Morocco, Food Director, is a big fan of espresso. He carries bags of coffee beans in his luggage https://wwwcoffeeeuk73686.bloggazza.com/29194579/a-retrospective-what-people-discussed-about-best-ground-coffee-for-espresso-machine-20-years-ago