On 1/14/18 11:02 AM, Leon wrote:
My table saw leaves a very clean edge, but my router table
leaves a edge that is buttery smooth.

Not the best for a glue up.

I wondered about that as well. A really smooth surface won't soak
up the glue as well and you could squeeze out too much when
clamping.


There is a lot of back and forth on this. Typical yellow/wood glue
is not a good gap filler and works best with a minimum of product in
the joint. Tooth marks create gaps. Additionally there is a lot of
back and forth talk on starving a joint by squeezing glue out of it.
Glue starvation as it is often called is when there is no or not
enough glue on the surface to begin with not because you had squeeze
out. You get squeeze out because there was too much glue in the
joint to begin with. If you don't get squeeze out you have no
indicator that the joint is tight. I have never had a joint fail
because of too much clamping pressure and causing too much glue to
squeeze out. Remember, a quality glue joint line is one that is
almost invisible.

Yeah, there are a lot of old wives' tales in woodworking and those are
three of them.
Glue doesn't "bite" and holds perfectly fine to "buttery smooth" surface.
The glue staved thing is mostly a myth. The proper amount of glue is
enough glue to lightly coat the surfaces, and if wanted, allowed to
"soak in" for a minute before joining together and clamping. And that
is usually too much. :-) Like you said, if there's *any* squeeze-out
at all, it's enough.
As for clamping, again I will say I think most people would be very
surprised by how little pressure is actually required for a properly
clamped glue joint. Most people, myself included, use WAY too much
pressure and way too much glue.


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-MIKE-

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