Hmmm, that sounds strange. Are you sure? What kind of blade?
I'm adding some photos here. Two of the photos point out something I did with my first attempts to cut masks which left the appearance of not cutting.
1. This is an AutoBlade and the little tool will loosen or tighten the bottom of the blade housing. It's useful to clean out little bits that might become stuck inside the blade. When you take the end off the AutoBlade housing, the blade is visible.
2. If you're not using an AutoBlade for Cameo 4, you will have to manually set the depth of the blade.
3. The 'handle' that I have hold of, is the latch for the blade. Note that looking in the small hole in the first picture it is black and in the second picture it is green. Green means it is latched. The first couple cut attempts, I didn't realize this is a latch and when the machine did it's thing for setting the blade depth, it just pushed the blade upward and the blade barely touched the mask material.
4. something else to point out, the AutoBlade movement in total is 1mm. That means each depth setting 1,2,3, etc. is adjusting the depth by 0.1mm or 0.004".
Dave