Fujikura CT50 How to adjust the blade height

Why the blade height adjustment is necessary ?After replacing the Cleaver Blade or the Clamp Arm, the blade height might become higher or lower from adequate one.
Higher or lower blade position causes bad cleaving quality.
To keep good cleaving quality, blade adjustment is necessary.

[@mohamedmeghawri9475]

It is so bad. Why all these steps to only adjust cleaver blade hight