On 1/29/2015 5:05 PM, whit3rd wrote:
On Wednesday, January 28, 2015 at 7:16:37 AM UTC-8, dadiOH wrote:
"DerbyDad03" wrote in message



I took the shot from
above to show the shoulders left by the wobble dado.

In another reply, you said you were going to reduce the width of the dado.
Good idea. If you had it set to way beyond the 1/4" you need, reducing it
to a hair over 1/4" will markedly reduce the curve.

This may be misguided; wobble-dado blades are sharpened at the factory in
a manner that will be a bad match for either extreme (wide or narrow)
of the width setting. There IS likely a setting at which the wobble-blade cuts
a flat bottom.


It will be less pronounced but it will NOT be a flat bottom dado.

The only time a wobble blade will cut a flat bottom is if the kerf is,
let's say, 1/8" and you have it set for a 1/8" dado. In other words NO
WOBBLE and the blade tip remains perfectly perpendicular to the workpiece.

Just think about the path that wobbling blade takes for a minute or so
and visualize it sweeping back and forth like a pendulum.

Wobblies are handy for removing large amounts of wood quickly and for
dadoes where it doesn't matter if the bottom is curved, as in door panel
inserts or drawer bottoms.