& nbsp; Jinan Zeye believes that before the trial operation, the hydraulic, lubrication, electrical, and water systems of the uncoiler should be debugged. The trial operation should be carried out according to the procedure. First, idle the motor, manually operate the centering hydraulic cylinder, expansion and contraction hydraulic cylinder, external support hydraulic cylinder, etc. Their stroke, speed, and limit should meet the requirements, and then power on for operation. Before operating the expansion and contraction drum, a safety hoop must be put on. The motor should be started while the outer support is in a supporting state to rotate the drum. The speed of the drum should be increased in stages until it reaches normal speed before continuing to operate for the specified time& nbsp;  & nbsp; Structure of unwinding machine: The unwinding machine body is a welded box structure, and the variable frequency speed regulating motor drives the drum shaft to provide the main power for the unwinding machine after being reduced by the gearbox. The reel of the uncoiler is a hollow shaft supported by two bearings on the gearbox body, with a transmission spur gear installed between the bearings.&Nbsp; The gearbox is lubricated through forced lubrication and is equipped with two constant speed motors for a closed-loop oil lubrication system. The core shaft is a cantilever structure, and its front end is supported by an external support bearing during unwinding to maintain the rigidity and stability of the unwinding machine.