Carl,
Not conversant with a 145 controller but I do have a manual for it, for others reading this Heidenhain uses it's own form of code and not G code.

A guy near me has a Bridgeport VMC with a 155 control which he programs at the machine for simple jobs, if he gets a complex shape, usually curved flanges, he brings a part or drawing and I program it to do one pass with a 20mm cutter 10mm deep from this he can work out subsequent passes to do the job.

I can do the same for you on your billet wheel if you need, best to do an air cut as I don't speak Heidenhain and have no way of checking the program.