AVI3241

hi! i am new with this vinyl cutting area. i have 3 questions. 1. in my machine i have a speed and force, that i can change. what is mean? what is doing if i change this values? 2. if i want that the blade go more down to the vinyl, ehat i need to do? what to change? 3. i want that the border of the object' will be more thick. wjat i need to change for this? the machine is seiki 720T, the software is, signmaster 3.5. thanks a lot reguard avi