VEVOR E490T Manual Del Usuario página 152

If adjusting the cutter depth fine-tuning cannot cut off a piece of paper, you
can only adjust the cutter depth balance screw; remove the fixing screws at
both ends of the upper cover and remove the upper cover.
Loosen the locking screws of the 7 M6 blades fixed on the knife holder. And
adjust the blade depth at the upper end of the tool holder to adjust the
balance screws.Generally, it is appropriate to adjust the cutter to cut into
the knife pad 0. 5mm.