Re: [CAD_CAM_EDM_DRO] Cnc router help

Very good Wilfrid!

As for the lengths- 66 and particularly 96x.75 ballscrews will
have very low critical speeds and safe compression loads.

They get pretty low with an aspect ratio of more than about 60
but can be used for light loads.

Please review the thomson design tables in the catalog or on line at their
web site.

You can figure your loads as cutting force (if any) + moving
mass time max acceleration. Friction force is small.Then just stay within
the forces on the tables for your length, pitch, and diameter.

Max acceleration will be a function of your NEMA 34 steppers.

As for linear rails you have chosen then longer lengths in the pre-drilled
and supported style. That's good.

As I have said I can do ballscrew ends but I am probably far away and would
not be much cheaper than anyone else.

Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html