I have found that the easiest way to do repetative things is to write a visual basic script. I have written several of these. I use DRO's to put in the information, such as start values, finish values, cut increments and lengths. The script takes the values I have put in the DRO's, e.g. start value 1 inch, finish value 1/2 inch, increment 20thou, length 3 inches. and then out puts the G Code to the lathe, each time taking the 20 thou cut until it arrives at the finish value.
It works very well and only take one command to implement it.
I have five of these Macro scipts for various little roughing out jobs which I can insert in any program at will. There is a guide to visual basic scripting in the video tutorials.