You can check Vectric off the list of possibilities your cam file isn't going to cause a sudden drop unless you programed the part that way.
As far as what the cause is it could be a lot of things you're just going to need to do some reading based on your components. I would suggest giving more information including pictures of your machine along with a video of the problem so you can get help. Otherwise your going to get a bunch of guesses and you will have a hard time getting good information.
Dan