Thanks, Leo, I'm not to worried about saving time I plan on an hour for doing each half of the submarine hulls but I would like to save time on finishing afterwards. the step over seems to be to key to getting the finish. If it ever cools down enough I'll play with the setting and make a run to see how it comes out. I have the designs done for 2 of the 5 classes of boomers submarine. I want to run them before I spend any more tme on the other designs but I am NOT gonna run the CNC when the temps are over 110 degrees. Life is to short and I ain't going anywhere.Don, I used a 1/4 ball end mill for roughing and finishing. I used a 1/4 end mill to cut out. Feed at 250 IPM, RPM at 16000. Took 53 minutes. I could have run at 350 of 500 to save time. I also could have changed stepover from .020 to .030 or more to save time. I could also change the roughing from DOC of .1, to .2 or .3 to save time. I also could change the roughing stepover from 75% to 90% to save time. Lots of room to change things. The thing with feedrate is acel and decel. You never get to max feedrate anyway. Even with that said, I am sure I could cut the time to 1/2 hour or less without trying too hard.
With things like this I like to start slow and tweak it up.
If I make these to sell, I will definitely make it go a lot faster and make a dozen or so at a time.
Bill, Thank you, I am happy with it.