If the 920 single hydraulic paper cutter cannot cut off, you have to grind the knife. "Cut the knife in half first, then turn off the screw of the knife, and then take out the handle to take the knife away, then remove all the screws, take the knife down and send it to a professional grinder to grind the knife. Reinstall the knife in the feed program. Generally speaking, the sharpening knife is narrower than the original knife.
At this time, you must put down the knife. First, take a piece of A3 paper under the knife. Then lower the knife to the low, turn off the power, loosen Open the nail, there are three knife adjustment screws on the upper part of the knife holder, take the inner hexagon and press down until the paper knife cuts through.
