Upper and lower feed rollers due to the shortcomings of the left and right column processing methods coupled with the influence of gravity, so that the deformation of the concave, two rollers are not parallel, the formation of run-off.

1, the feeder and the levelling machine are not on the same plane, you need to re-install the equipment.

2, when the opening is found at the opening of this problem, you can adjust the position of the coil on the uncoiler to correct the deviation.

3, the equipment roller on both sides of the pressure imbalance, needs to remove the light side of the chain, the heavy side of the rise, or remove the heavy side of the chain, the light side of the pressure.

4,The centre of the deskewing wheel does not coincide with the centre of the original roll opening direction. When the thick plate is opened, the clamping force of the deskewing wheel can prevent the sheet from deviation. But when the open thin plate is opened, the clamping force of the steel plate has exceeded the yield strength of the steel plate, resulting in a slight deformation of the edge of the steel plate, so there will be a deviation phenomenon, the thinner the plate the more obvious this phenomenon.