In trying to make chess pieces with my recently-purchased 4th axis, I have been having trouble with the piece being completed when the machine thinks the file is done. I have been thinking it is a VCarve software issue. I looking closer at the G-code, it appears the machine is ignoring 0-to-360 and 360-to-0 A-axis commands.
When this (long) section of code runs, the result is a line carved down the length of the piece that follows the contour of the piece along that line. Since 360 and 0 degrees are at the same place, is my controller interpreting these A-axis commands as NULL movements? Do I need a controller firmware update?
I have more details about these troubles at the VECTRIC forum, with images of results and links to the full MMG file -