The stepper motor driver generally obtains three kinds of signals from the host controller: pulse, direction and enable signal. The enable signal is also called the release signal (offline signal). Most stepper motor users do not use the enable signal. Under what circumstances do you need to use the enable signal? How to use the enable signal? When the offline signal (MF or EN is marked) is low, the current output from the driver to the motor is cut off, and the stepper motor rotor is in a free state (offline state). In some automation equipment, if the stepper motor shaft (manual mode) is required to be directly turned on while the drive is unpowered, the MF signal can be set low, the stepper motor can be taken offline, and manually operated or adjusted. After the manual operation is completed, the MF signal is set to a high level to continue to receive automatic control of the upper computer.