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methods of work #3: Vacuum jig for cutting tapered laminate on sliding table saw

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Blog entry by Loren posted 544 days ago 2650 reads 0 times favorited 6 comments Add to Favorites Watch
« Part 2: How to set a chisel hoop so the handle won't splinter Part 3 of methods of work series Part 4: Bent laminated prototype chair legs »

Here’s a jig I made to rip 40” long tapers that go from 3/16” at one end to 1/2” at the other.

One could band saw these out and then do the finishing on a planer, but I wanted to see if I could get glue-able surfaces right from the table saw.

It works well, and the surfaces are very smooth and consistent.

I’m making a chair prototype with laminated curved back legs. The wood I used here is just construction lumber and it has too many flaws to really be usable, but the tapers came out as nicely as I could have wished. Last picture is the tapers ganged up to show how the leg will taper from 2” to 3/4” over its length. The four layers will be glued and clamped into a curved form.

-- http://lawoodworking.com



6 comments so far

View Jorge G.'s profile

Jorge G.

1524 posts in 1077 days


#1 posted 544 days ago

Pretty nice Loren, what is the size of the blade? I could never make strips that wide on my TS.

-- To surrender a dream leaves life as it is — and not as it could be.

View Loren's profile (online now)

Loren

7258 posts in 2249 days


#2 posted 544 days ago

I think it’s a 300mm blade.

-- http://lawoodworking.com

View SteveMI's profile

SteveMI

845 posts in 1896 days


#3 posted 543 days ago

Loren – how about a little more info on the vacuum connection? Did you make them or get them commercially?

Steve

View Loren's profile (online now)

Loren

7258 posts in 2249 days


#4 posted 543 days ago

These are the cups:

http://www.ebay.com/itm/VACUUM-TABLE-CLAMPS-PODS-for-CNC-WOODWORKING-/280402721057?pt=LH_DefaultDomain_0&hash=item41494df921

I bought them a few years ago from the ebay seller
but never got around to doing anything with them.

There’s a bit of a knack to pressing the work
against the cups so they all grab. The face has
to be pretty clean. The jig cuts so straight though
the offcut face is clean enough to stick right on
the jig with no jointing. The work won’t slip at all.

The pump is a GAST model I bought on ebay like
10 years ago to do veneering with. I have a
gauge on it and it pulls to about 20-25 psi
on the gauge… which is fine for clamping.

I have a right angle clamp I made years ago too
and it was useful for clamping cabinet corners
for nailing before I got into using dowels and confirmats.
It’s also nice for sanding panels because I just
clamp a plywood board in my vise, stick the
clamp to that and then stick the workpiece
to the other face of the clamp.

I’m just getting started with this chair project so I’ve
got nothing to show yet, but making the jigs will
be interesting.

The chair I’m basing this project on is in the book
“Making Furniture” by Mark Ripley.

-- http://lawoodworking.com

View stefang's profile

stefang

12592 posts in 1936 days


#5 posted 543 days ago

Gad, that’s cutting it close! Very inventive jig.

-- Mike, an American living in Norway.

View kaerlighedsbamsen's profile

kaerlighedsbamsen

436 posts in 315 days


#6 posted 293 days ago

Would love to see how the tapered legs you made the jig for turned out!

-- "Do or Do not. There is no try." - Yoda

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