Dave wrote:
On Thu, 17 Jan 2013 10:18:22 -0600, Swingman wrote:
The T-S Aligner Jr:
http://www.ts-aligner.com/tsalignerjr.htm

I was wondering. Does the Aligner fasten down in that t-slot before
you engage the measuring mechanism?

I'm thinking that because it can slide in the t-slot, that there would
be some slop in the measuring caused by it, as small as that slop
might be?

None at all, because it doesn't slide, it rolls. Simple engineering
principle ... A precision bearing, or wheel, makes continuous and intimate
contact with the surface it rolls/rides against.

Three precision roller bearings form a triangle ... two fixed, and spaced
apart bearings roll against the same side wall of the machined miter slot;
a third, adjustable bearing, centered between the two fixed bearings, rolls
against the opposite wall of the miter slot.

Simply place the unit in the miter slot and adjust the middle bearing so
that all three bearings contact, and are touching/rolling against both
miter slot walls.

Result, no "slop" at all.

Ed Bennett is one helluva engineer, and that fact shows in every aspect of
his product.

--
www.ewoodshop.com (Mobile)