I started trying out my new D4R dovetail jig. When I am routing the tails
in through dovetail mode, I am getting a lot of chatter. I am using a
PC8529 plunge router.
I finally got one to come out looking good even though I had a lot of
chatter. It feels like the bit is gonna break sometimes.
What's up with this??
Have you got eh bit in as deep as possible in the router collet?
Are you using the 1/4" shank bits? You might want to switch to their 8mm
bits. They have a lot more mass.
When cutting a through DT with the DT bit you are removing a lot of material
Yup. If you're going to be doing this a lot, try to get an 8mm collet
for your router and buy the 8mm bits for the Leigh.
Or, if you have two routers, put a straight bit in the other one, set
a little higher than the dovetail bit, and pre-cut with it.
I will give this a try also!
I am getting very frustrated with this thing. I even managed to hit the end
of one of the fingers with a spinning bit and cut a small chunk out. I
moved this finger to the end where it will not get used, but I think I will
still replace it. I think I am done for the night.
Make sure your collar is centered on the bit. Both routers.
Recommend the spiral bits for precut and pins. They make finer sawdust, but
no chatter as with the two-flutes. You might have to adjust your jig a bit,
according to instructions for differing diameters.
Did I mention to center the collar on the bit? Both routers. prevents
I understand that perfectly.
I simply felt it was important to point out that my D4R manual states in
several locations that two routers usually create more problems than
they solve. I'm glad they work for you.
That's true for halfblind dovetails where only one bit is used ... for
through dovetails where two different bits are used, at least in my older D4
manual, they indicate that a second router for the straight bit is a good
idea (page 62 - Fig 8-29).
I double checked.
The mention you reference is not in my manual, dated 01/05 on the
inside back cover.
On page 47 (fig. 7-7), they state that "Concentricity problems can
_only_ (my emphasis) arise if two routers are used for through
dovetails, (one for pins; one for tails)."
My manual is considerably older [apparently back when routers and jigs were
better made ;) ] ... 1995.
Here is the applicable page:
AAMOF, and because I've quite often done as many as 60 or 80 drawer sides at
a time, I've always set up two routers when using the Leigh D4 for through
dovetails - one for the DT bit/one for the straight bit - and never had a
problem, and not even the same two routers every time ... go figure.
That said, I've always noted, as Leon confirmed to me the other day as his
experience, that "through dovetails" with the Leigh are a lot less fussy
than halfblind dovetails.
... AAMOF, I won't batch cut too many halfblinds, pins or tails, with the
Leigh D4 without doing some interim test fits.
After screwing around a bit.
As I said in the first of my posts, center your bits. Every point on that
circle is equidistant from the center, and no problem with either
compensating or uncompensated error. Doesn't matter, never did, what the
manual suggests. Avoiding the error beats compensation.
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