Re: [CAD_CAM_EDM_DRO] Re: Re: Belt vs. Direct Drive

alex wrote:

>Granted - climb milling is a special case. I remember I broke a mill bit
>even on
>a huge hydraulic mill - don't remember what make, it was 25 years ago.
>(this contributed to my search for a new career).
>It probably can be avoided in a CAM. Don't think Bridgeport will do climb
>milling.
>This requires extremely rigid machine.
>
>

I do climb milling on my CNC'd Bridgeport all the time. When machining
aluminum, especially,
climb milling makes a vastly better surface finish, as it does not mash
chips into the clean,
retreating surface. I always did a climb mill pass with a very thin cut
to clean up the surface
when it was a manual machine. But now, I program almost all my cuts for
climb milling.
It is also known to reduce tool wear, as it prevents the cutting edge
from skating along the
work surface. I DO have anti-backlash ballscrews.

Jon