I never run my machine over half speed. I have the Innovis NX-2000 & I don't want to put too much wear & tear on the moving parts inside my machine. I can't afford to replace it every few years. That being said, one day I was sewing after setting up my machine in the table again & the speed lever had been bumped and was a little more than halfway up. The machine did start to vibrate & my table is a Gidget 1 which is real nice and sturdy! I moved the lever right back down again. Quilting is not a race... enjoy the process!