in the five years i've owned my machine, i've never come across this problem. after about 50percent of the carve, the machine keeps stopping and saying a power fluctuation. I hit enter and it will keep carving for a little bit, maybe a couple minutes then the same thing again... I'm about 65% into the carve and it's driving me nuts. it's a recon that I bought a couple months ago... any help would be greatly appreciated... it is a second machine. never had this problem in five years....