STEPPER MOTOR JAM DETECTION CIRCUIT

摘要

Methods, devices and circuits for detecting malfunctions in stepper motors. A signal from a driver circuit to a stepper motor that is proportion al to the current in the windings of the stepper motor is detected. This signal is the n amplified and integrated for ease of comparison. The resulting signal is then compared to a specific entry in a table of values with each entry in the table correspondi ng to an operating profile of the stepper motor. If the resulting signal does not correspond to the operating profile for which the motor a configured, the stepper motor is jammed. A suitable alarm and a corresponding sequence of actions may then be triggered .