I am not totally familiar with your cutter, but you will need to set the blade so it just sticks out of the blade holder it dose not matter which direction the blade is facing it will rotate in the blade holder and follow the cut head this is true with all drag knife machines, the only ones that it matters with are the true tangental machines that pick up the blade and turns it when it makes a corner, the gram force I think you should start at arround 70-80 for 2-mil high performance films, and 80-85 for the 2.5-mil medium range films once you have the settings set above you should do a test cut depending on your software you may or may not have a test cut option, you could also have a test cut option on the cutters menu, if not create a square about 1/2 in size and set a circle or triangle etc, inside of that square and cut it on your vinyl,
then weed the bigger square and see if it leaves the smaller squaer or what ever object you have used, they should come apart cleanly, then remove the inside object and check the cut line it should be indented int the backing paper but not cutting into it, you will need to adjust blade depth and pressure till you get the desired results, good luck//chopper