"Mark & Juanita" wrote in message
m...
Leon wrote:


"Upscale" wrote in message
...

"Leon" wrote in message
the bit could be bending while spinning and cause too much material to
be
removed. This could be exaggerated at higher bit speeds. Leigh
recommends
8mm and 1/2" bits to help fight chatter.

Hmmm. You could be right, but that's an awful lot of bit chatter for the
amount of dead space shown in the pictures he presented. I'd freak out
if
any router I had caused that much wobble.


Chatter along with a smaller based and light weight router could do that.

Chatter may be a contributor, but I've seen the same kind of gapping when
using the heavier plunge router as well. I'm starting to really lean to
the idea that neither of my router bases is flat enough and that there is
enough rocking that I'm getting excessive cutting.

I need to look into the 8mm bits but then will need a collet adapter to
work in my router

Something else to consider, since the DT jig will flex when a router is
setting on it, are you using a backer board under the top clamp to totally
support the entire width/length of the DT jig? If it is not totally
supported it can raise or lower with the weight of the router closer to the
ends of the work. It also insures that the DT jig is adjusted correctly to
the correct plane.