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Direct return to zero method This method installs a stop block at the zero position, and then makes the stepper motor drive a sufficient angle toward the zero position. When the stepper motor returns to the zero position, it is blocked by the block and the motor is stopped. Bearing is zero.

This zeroing method is simple, but when the motor is blocked by the stopper, it will still drive the motor to perform the zeroing action, so it will not only cause damage to the stepper motor and the transmission mechanism, but also violent vibration and large noise will occur. 2. Sensor method This method installs position sensors such as Hall switches and photodiodes at the zero position. When the stepper motor returns to the zero position, the sensor gives a detection signal. When the control circuit detects the signal, the motor stops at zero. Orientation.

This zeroing method is accurate and reliable, but it increases the complexity of the circuit and places certain requirements on the device. 3. Special motor drive chip with stall detection is used. 芯片 This chip can immediately detect that the motor is stalled when the motor stalls, thereby determining the zero position. However, this Purifier motor manufacturer method has poor versatility, and has certain requirements for the current phase of each winding of the stepper motor, and this method cannot be used in the micro-step driving mode.