What are the steps involved in espresso delivery?

During espresso delivery, the thermoblock activates first, followed by the grinder for a set timing based on coffee taste selection. The pump then activates briefly for pre-infusion before restarting for full coffee delivery, after which the infuser moves away from the mechanical valve, releases the coffee pod, and the mechanical valve discharges excess water and coffee to the expansion chamber and drip tray. (Page 7)