Cutting a cylinder to length

[Murdock]

I'm trying to figure out how to program a ramping contour on the end of a cylindrical part. The machine is an Okuma HMC 650B, and I'm using MC2023. I can't share a file, but the part is pretty simple, and I'll try to be as descriptive as possible. Our current process was programmed before I started here, and we no longer have the software that was used to program it. We're using the side of an endmill (not the end, it's a horizontal mill) to trim the top approximately 5mm of stock. It's currently starting off the part in X, going to X0, then rotating the B axis 360 degrees, then leading out in X, taking multiple passes, till the required length is reached. There's got to be a way to go to X0, start the B rotating, and feed down in Y, either at an angle, or depth per rotation, right? Seems simple enough to just hand code, but translating the feed from mm to degrees/min is what's making me wonder if it's worth bothering. Seems like there's got to be a toolpath that would cover this, and do that math for me.

[Kalibre]

Every time I have to do this I just finger cam it.

Taking 0.197" of a 4" cylinder would be like:

G90 G00 X3. Y0.2 Z.25 B0.

Z-2.

G01 X0 F150.

G91 G01 Y0 B2400. F750. (feed depends on machine totally, B value is 0.2 divided by 0.03 step over)

G90 G01 X-3. F150.

It is easily doable in MCAM, I just hate needless bulk to the point I'd just do a G65 macro call from manual input if it happened often enough. 

Add a spindle orient with a turning tool and you can do turning ops this way too.