How an Espresso Coffee Maker Works The machine is easy to use, however it requires precision in grinding and tamping beans. It also takes a long time to warm up. Chris Morocco, Food Director Chris Morocco, Food Director of espresso. When traveling, he carries bags of coffee in his suitcase. https://coffeee35685.ampedpages.com/5-laws-that-ll-help-in-the-best-ground-coffee-for-espresso-machine-industry-57119850