There are a number of configuration settings that affect the A axis. In general config angular is measured in degrees and not affected by a whether you are working in inch / mm units and if inchecked it will be measured in linear units just like the other axis. Do a search , type in , ROTARY TABLE AS LINEAR , and you will find a number of posting s worth reading. There are a whole bunch of things associated with a rotary table. I have just used mine as an indexer
but you can program moves in ipm instead of degress , etc.
RICH