(4) Ensure that the horizontal projection of the passive roller and the driving roller are parallel, and then check whether the position of the left and right diagonal side stop rollers is appropriate.
(4) Ensure that the passive roller is parallel to the horizontal projection of the drive roller, and then check the position of the left and right verse side stop rollers is suitable.
(4) Ensure that the horizontal projection of the passive drum and the driving roller is parallel, and then check whether the position of the right and right diagonal stop roller is suitable.