On 02/14/2016 5:23 AM, dadiOH wrote:
John McCoy wrote:
wrote in
:

Before you can join an edge, you must have a flat face. I can - and
do - get that with my drum sander.

OK, I'm a little confused here - how is that different from
running a board thru a planer? Seems like it would make it
smooth but not flat.

I don't have a planer, never used one but I suspect it is the same...

Run board through, concave side down to make convex side flat. Turn over,
run through to make concave side flat (and parallel).
....


I suppose with the little lunchbox planers, they may not have enough
hold down force to not, but a "real" planer will (and a lunchbox has to,
at least to a degree) take any bow out, smooth the top surface as it
goes through, then the bow will come back out the other side.

A jointer, otoh, takes the high spots off and leaves one with a flat
surface _first_. _THEN_ one runs that face down through the planer and
ends up with voila!! a flat and parallel-faced piece of stock.

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