My Janome has done that. I took it into the dealer and bought a new foot. That didn't change a thing. It did it again. I blame it on the computer. It does it off and on. I just turn off the machine I get a FC error. It hasn't done it lately. I just know when it is having a fit, that eventually it will go back to being nice. Not going to buy another foot and hate to be without my machine, so I just deal.