"Auxiliary" motor plays a braking role in the operation of the system. The electronic control box outputs an adjustable voltage and shortens the two coils of the motor. The voltage range is 40V~130VAC, which can be controlled by an adjustable potentiometer. By switching, the main motor runs and the system moves forward. At this time, the auxiliary motor latches and releases, but produces a reverse pull to balance the system. After the stop command or the limit is reached, the system stops running. The final tension is achieved by the control box, which makes the main motor stop and hold, while the auxiliary motor reverse to obtain the final tension, so that the fabric of the system is tightened.
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