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Why the main sealing PE film can not be cut after changing a new main sealing cutter?

Why the main sealing PE film can not be cut after changing a new main sealing cutter?
Update Time:2017-01-22

The principle of cutting is “pressure”,  not the “sharpness” of the cutter. We suggest you to adjust the position of sealing cutter by regulating all screws (in below red), to make sure the cutter is in the horizontal plane, so that the cutter is with uniform force.