rpm limitations

[JoeLee]

People who have to make the mortgage payment on the machine. 10 yrs ago, you could get an entry-level Haas CNC lathe that would do 5k at the spindle with a 10-inch air-operated chuck all tooled up for about 60k One nice feature is that it speeds itself up as the part gets smaller.. Today you can get 5-axis mills that will do 15k at the spindle while interpolating simultaneously in all 5 axes. von Hermle comes to mind. https://www.youtube.com/watch?v=smV3zbD4irw

Hey Doozer, ya seeing this?????

The name of that game is to optimize your process to crank out as many parts as possible per day, because you have to make a 4-figure mortgage payment on the machine.

If that spindle was spinning at 15K the chips must have been flying off that cutter at the speed of light because I sure didn't see any. Or was it just following the contour for demo purposes.

JL.............

[nickel-city-fab]

If that spindle was spinning at 15K the chips must have been flying off that cutter at the speed of light because I sure didn't see any. Or was it just following the contour for demo purposes.

JL.............

Yep, demo. Here is a CAD/CAM software company with actual cutting (dry) for a demo of their software on a Hermle. https://www.youtube.com/watch?v=3H0inW9I7yI

I note they have slowed down the toolchanges a bit.

Either way, that sort of machine does not come cheap, and that is why the crazy RPM's. When I was taking the CNC courses at the local community college, we were cranking out identical parts in aluminum at up to 6k RPM, and measuring cycle times trying to get the most qualified parts in the shortest time.