Hi there I have an 04 sc252. Great machine and runs perfect. I have noticed lately once in awhile the grinding wheel will randomly just shut off. Even if I'm not really taking much of a bite. You actually almost dont even know it turned off until you look at the wheel. Then I just have to simply lower rpms and turn the switch off and then back on. It will then start spinning again and back to grinding. It doesnt happen often but it happens once in awhile. Just wondering what this may be in case it decides to turn off and not turn back on at all. I was thinking my on/off switch is on it's way out. Thanks !