Seems to work fine here, do the extent DROs on the Toolpath page work right?
Hood

Randy, does the code have any rapid moves far away from the stock? That'll show up in the min/max DRO's.

OK, an update.  Chris, your suggestion of regenerating the toolpath did it, even with a gcode with arcs.  Doh, I've been using the machine for almost 3 years and never noticed the large "Regenerate Toolpath" button under the toolpath display.

If I regenerate the toolpath having just zeroed the Z (i.e. X and Y are within the machining envelope and Z is just touching the top of stock) the X and Y extents show properly.  The Z, however, seems to have the current tool offset added to its minimum number.  Hood, the extent DRO's on the toolpath page show the same readings.

Given that the readouts are also on the Toolpath screen, I'll probably take them back out of the Simple screen and enlarge the toolpath display a little.  I always run my code through Cutviewer Mill before I run it, so I know where the cutter will be going.

But I did learn about Regenerate Toolpath!

Thanks guys,

Randy