"Larry Blanchard" wrote in message

On Mon, 21 Jul 2014 10:54:06 -0400, Mike Marlow wrote:

Leon wrote:


Actually the direction that you move the sander, ROS or finish
sander,
is more important.

I have to disagree with this statement Leon. It has nothing at all to
do with direction. I would say that it has something to do with the
speed at which you move in any direction - so as to allow the orbital
action to do its thing, but most certainly - not to do with the
direction. It's orbital - direction has no meaning. With a finish
sander - ok - might agree on that point.

Since I seem to have triggered this discussion, I'll chime in.

I agree with Mike. I've never had a problem with cross grain scratches
using my ROS. Sure, you can see scratches in coarser grits, but they're
orbital, not directional. If Leon is seeing scratches most likely he's
either not going to a fine enough grit, he's bearing down too hard, or
he
has an orbital sander, not a *random* orbital sander.

I can't state that there's no ROS that will do what Leon's does, but I
can state that mine (an old Bosch) doesn't.

Can the mechanism in an ROS fail in such a way as to eliminate the
randomness?

It has nothing to do with randomness, nor orbital for that matter. It has
to do with the movement of the sander itself, not the motion generated by
the sander.

--

dadiOH
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