When we load or G-code into mach 3 and look at it it looks like the part is up off of the zero Z axis.  Are we doing something wrong in Sheet cam that would cause this?  Our first few parts worked fine and then we must have done something to change it.  Any help is appreciated.  Attached is a pic from mach 3.  So when we try to start cutting the torch moves up off of zero, then moves again and runs about in 1'' up off the metal. I can post a video to if that helps.