(1) Cut a stack of cardboard slightly smaller than the size of the lower platform (with a basis weight of 200-300g/m2 being appropriate) for later use. It is advisable to use cardboard with uniform thickness, compact structure and hard texture, as it will have a small plastic deformation under strong pressure.
(2) Install the die-cutting plate. The die-cut boards sawn out with a saw often have insufficiently smooth cuts. Some steel knives and steel wires have wood shavings on the back. During die-cutting, the local pressure at that location will be too high. Therefore, it is essential to clean the wood shavings off the back of the steel knives and steel wires thoroughly.
(3) After the die-cutting plate is installed, take a piece of the prepared cardboard mentioned above (hereinafter referred to as the "pressure-regulating cardboard"), make the right edge of the pressure-regulating cardboard flush with the edge of the mouth and the right edge of the lower platform, and then stick the pressure-regulating cardboard onto the lower platform with adhesive tape. Adjust the pressure according to experience, press the machine's development history, and press the knife mark on the pressure-regulating cardboard. At this point, the precision requirement for die-cutting pressure is not high. As long as the pressure regulating cardboard is not cut and the knife marks can still be seen, it is fine. Subsequently, the die-cutting pressure can be locally adjusted based on the knife marks. Remove the pressure-regulating cardboard from the lower platform, and at the same time, extract the color from the plate frame of the machine. Then, stick the pressure-regulating cardboard onto the upper frame steel plate with adhesive tape. Since the pressure regulating cardboard is placed flush with the right edge and front edge of the lower platform during creasing, its right edge and front edge are fixed relative to the right edge and front edge of the upper frame steel plate. This position should be marked in advance on the upper frame steel plate with a pen for long-term use, which can conveniently align the pressure regulating cardboard with the marked position on the steel plate. Then fix it with adhesive tape. The knife marks on the pressure-regulating cardboard adhered to the steel plate should be aligned up and down with the position of the steel knife on the die-cutting plate below it. When local pressure supplementation is needed later, it is only necessary to find the corresponding position on the cardboard for supplementation.
(4) Install the indentation line again.
(5) Taking into account the total length of the steel knife and steel wire on the layout, the thickness and hardness of the cardboard to be die-cut, the hardness and area of the rubber strip and other factors, roughly set a pressure value and adjust the pressure regulating mechanism to an appropriate scale.

(6) Input the first piece of cardboard to be die-cut, conduct a pressure test for inspection, and then adjust and correct the pressure. The correction of pressure is divided into two types: overall adjustment and local adjustment. The overall pressure CTP should be adjusted first, followed by the local pressure.

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