re:Re: Accuracy of ( was Linear Slide Components

Ballendo writes:

>Exactly right. This is why nearly ALL truly heavy duty CNC machines
>use BOX ways, rather than linear bearings. Intermittant cuts are very
>hard on any piece of machinery, and the linear bearings do not handle
>these types of loads the way the full sliding contact of box ways
>can...

Tell us more about box ways.
What sort of sliding surfaces do they have turcite/teflon/babbit?
size and length of box?
pressurized lubrication?
how are the ways supported?
If they have more friction that roller bearings, does this affect the
ultimate precision of the machine?

Thanks.

Elliot