How to detect the absence of coffee beans in a coffee bean grinder

摘要

A method for detecting the state of a coffee bean grinder includes supplying a power supply voltage to a motor of a grinder and monitoring at least one operating parameter of the motor with a motor stall detection sensor. The method further includes determining whether motor stall has been detected based on monitoring at least one operating parameter of the motor by a motor stall detection sensor. The method also measures the weight of coffee ground by the grinder using a weight sensor, the motor stall is not detected, and the weight sensor does not detect a change in weight at a predetermined time, It also includes determining that there are no coffee beans in the hopper that feeds the coffee beans to the grinder. A coffee bean grinder is also disclosed.