How to adjust the feed inclination of Shanghai Yahua automatic die-cutting machine

I am also a beginner. I encountered this phenomenon when I turned it on. Generally speaking, if the paper is uneven, it tends to tilt. You can flatten the left and right sides of the paper, and you can find a cardboard or cardboard insert. Generally, it is brought by die cutting machine. If the paper is flat, Yahua's die-cutting machine has a wheel on the left, which is to adjust the inclination of the paper. Another possibility is that the wind power of the flying suction nozzle is different. It can be adjusted. All flights have it.