When the upper roll is up and down, the synchronous button of the upper roll up and down on the touch screen is in working state. The setting value of upper roll synchronous lowering is 1mm. It is better to increase the value of upper roller by 2mm synchronously. The set data value should not be too small. The upper roll shall be basically synchronized during the up / down process. Level the upper roll in time. The reading difference between the display position of the upper roll on the overturning side and the display position of the upper roll on the fixed side shall be ≤ 30mm. Prevent the upper roll from tilting excessively to damage the parts of the rolling machine.<br>
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