I have been using the cnc usb controller and software for a few years now with no issues.
Recently ALL my routines that have worked in the past all start the z axis about .25" above what has been defined as zero at the top of the work piece. The z-axis zero is set by mean of a touch plate, again, having been used successfully for a few years. Have I inadvertently done something that has established an offset that has affected ALL my routines?

Help me Obi Wan.... I am not a Jedi yet....

Dakman standing by