I have a router setup similar to that from the Router Workshop with the
infeed side of the fence 3 mm less the outfeed. I aligned the cutting edge
of the bit with the outfeed side of the fence so each pass should take off
3 mm along the entire length of the board. This should give a sound edge-
to-edge join boards. The boards I am using are already dressed and simply
need some edge work to enable a sound glue joint to form.
I keep pressure against the infeed side of the fence until the last 25 mm
or 1" of the board and then move the pressure to the outfeed side of the
fence. The boards are about 400 mm or 17" long. Each of the boards that I
have jointed in this fashion end up with a banana shape in the middle, it
somehow seems that I am taking off more material in the middle of the
boards than at the ends. What am I doing wrong?
Thanks for the help in advance.
Remove the spamno from my eamill address.
Consider applying pressure to the out feed side as soon as there is enough
wood in that location to be supported by the fence. Also insure that the
cutting edge of the bit is "precisely" on the same plane as the out feed
side of the fence. To check this adjustment, carefully feed a straight
edged piece of stock from the out feed side towards the bit and adjust the
fence until the blade just kisses the wood.
As soon as you have enough material in contact with the outfeed fence to do
so, move pressure there--keeping pressure on the infeed fence just traces
the shape of the board.
Also, if you can, try setting for a lighter cut--3mm is pretty heavy--you're
going to waste a lot of wood that way.
Reply to jclarke at ae tee tee global dot net
I agree with the earlier post about keeping pressure on the outfeed side
as soon as possible. Also, check that your infeed and outfeed fences are
parallel. It not, and you try to keep the leading edge against the
outfeed fence then that could cause your concave cut.
Garry Collins wrote:
Sounds (reads) backward. Transfer pressure to the outfeed side as soon as
there's enough stock there to hold. The no pressure on infeed side - outfeed
My joints have improved as I lightened up on the pressure too. I take *many*
light cuts - 1/32nd" and use light pressure.
Pressure on the outfeed side is important, especially when you have a few
inches over there to generate an alignment, BUT it's also important for your
infeed fence to be longer than your board, to keep the same support points
as the cut progresses. Also, put the bow convex side out. Then you will
have support at the outfeed fence and at the tail end of the board
throughout the cut, until the tail hits the bit. Think about it. If the
poard is convex side out you realy have alignment only until the high point
of the curve gets to the bit. At that point you have alignment only on the
outfeed side, which may or may not be long enough to keep you straight.
If the infeed fence is shorter than the board you have to work convex side
to the fence and the high point of the curve must be on the fence before the
cut starts or you'll pull away from the bit when the high point gets to the
fence. Same thing if the board is convex side out and the fence is short.
The tail will be behind the fence at startup and the board will be lifted
away from the bit as the high tail rides up the end of the fence.
With your short workpieces it should be no prob to get an 18" infeed fence
You have received many good replies. Using the router table for jointing
does work but takes some "technique" and practice. The shape you
describe does happen if the input "table" and outfeed "table" are not
exactly parallel. Adjust your fences accordingly. I used to use business
cards for shim stock to exactly that. And the other thing I would highly
recommend, you mentioned taking 3mm cuts. I would certainly try thinner
cuts! Try 1 millimeter (or less even) and I think you will see some
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