I have been using my machine prity successfully for over a year now however it has slowly seamed to have developed what I call a brain fart. It seams fairly consistent normally within about 15-20min after running a cut the machine will suddenly stop all x y and z movement for a second and then carry on going, I think it's only ever happened once per use of the machine. It has done it a good number of times now without causing any problems so kinda ignored it until yesterday when it messed a pice of work up. I'm just trying to figure out what could cause it? Could it be static or something? Everything was earthed when I built it.