You cutter is slashing. There are so many different things that can attribute to this ... blade sticking out too much, serial vs. usb, wrong driver, memory buffer not happy, etc.
If you know you have a good blade depth, then it's time to try something else ...
try testing it using a different font, or a different word, some thing smaller, a piece of clipart, or draw some random geometric shapes, etc.
try switching from usb to serial (keyspan if necessary)
try a completely different usb cable
try a short usb cable
try a different cutting software
try rebooting your computer
try a different computer
try welding everything
You can work on blade pressure later if you don't think it's cutting through the vinyl enough, or too much.
*Every once in a while my cutter will do it too, don't know what really causes it, but I will restart my machine, re-import image, or try a different font (to test), etc. Basically if it's something that I absolutely have to cut, then I will work and rework until something works right.