Re: [CAD_CAM_EDM_DRO] how straight is straight[rails]?

carlcnc wrote:

>
> I had a guy ask me if I can make a router within .001 straightness
> over 48", I am not sure this is possible with "normal" equipment.

> Just to waste some time I checked my 5x8 in X.Y. best I can get
> is +/- .005 over 6',using said straight edge.

and I'll bet your steps are sub- 1/1000" !

which means maybe you could meet that spec with software compensation
on all the leadscrews. Note this means 3D compensation, which is
a bit more involved (but not much) than just independent compensation
of each leadscrew individually (ie the axes might not be orthogonal,
so the 3D compensation would compensate for that).

Doug Fortune
http://www.cncKITS.com NEW-> 1KW power supply kits














.