# Lynn Jig, help

• posted on February 11, 2008, 4:35 am
Hi all,
I am new to woodworking. I built this jig over the weekend, and it works. What I can't figure out is how to use it correctly; I spent the better part of Sunday trying to make a box joint. I read the pdf a dozen times and it does make sense on paper. Until I try applying this stuff. For some reason I end up with notches/teeth of variable width. Does anyone have a "system" of counting when they cut?
Thanks, GP

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• posted on February 11, 2008, 10:09 am

You don't say what kind of jig, but I use one like this, and the thing couldn't be easier. Junior High students mastered it in short order. http://www.routerworkshop.com/boxjoints.html
Principle is the same as the tablesaw version. The notch is the width of the blade or bit, the fence or "tooth" in your tablesaw jig determines where the next is cut. They tell you how to adjust to make the fit looser or tighter.
If you want the numbers to come out evenly, you make your stock a multiple of the bit or blade. Not that it makes any real difference in strength to the joint if you end up with a fraction at one end.

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• posted on February 11, 2008, 3:56 pm
wrote:

Assuming you are using 3/8" - 16 rod, here is an example. Say you are working with 1/2" stock and 1/2" dado blade raised about 9/16" above the table. Each turn would move the piece 1/16" to the left or right. So, first cut into the wood, then 8 turns would move you over 1/2" but do not cut yet, another 8 turns moves you and additional 1/2" and ready to make your next cut. So, your cut equals 8 turns, your male part of the box joint is equal to 8 turns. Simply put, cut, do 16 turns on the jig, cut again, repeat as required. ROY!

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• posted on February 11, 2008, 4:01 pm
Take a look at a comprehensive view of the jig in action here, and in the first box there is a hot link to a PDF that you can download that gives detailed instructions on the use of that particular jig:
http://www.leestyron.com/lynnjig.php
Robert

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• posted on February 11, 2008, 7:10 pm
> Take a look at a comprehensive view of the jig in action here, and in

Maybe I'm missing something, but compared to Fred Bingham's method for making box joints, this approach represents somebody with far too much time on his hands.
Lew

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• posted on February 12, 2008, 5:55 am

Lew - I'm not advocating this jig one way or another, but it is a pretty spiffy little setup for those that don't have the scratch to buy a dado setup (this only needs a sawblade on cheapie saw) and the table saw to run it. It allows you to cut much larger box joints than you with less work than you would on a router. Note that he is using a small Ryobi cabinet saw on one of his pics.
If you will look at the "photo intensive link" he provides, you can see that the time you spend cutting is probably made up by cutting two sides at once.
This jig was made (like the Incras, Jointechs, etc.,) with the intent to not have the cumulative effect that sometimes shows up with the "board with a peg) method of cutting box joints, although I have seen them with adjustments as well since this jig became popular many years ago.
Some magazine had an article in it many years ago where the author used this to make variable spaced box joints. He put his piece of paper down next to the jig (just like I used to do with the Incra I have) with the plan for cutting on it. Instead of looking at the tape gauge like I did, he laid his out based on number of turns.
The end project of variably spaced joints looked unusual, and pretty cool, too.
I guess the best part of this little jig is that you can make the tiniest little box joints you can imagine. With almost no effort, you can make jewelry box sized joints with the fingers the thickness of your sawblade. Now that's something that might make this jig worth building!
Robert

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• posted on February 12, 2008, 7:06 am
> Maybe I'm missing something, but compared to Fred Bingham's method for

much time

than
Bingham's method uses a table saw, a board screwed to the miter gage and a square pin the width of the joint sticking out the front of the board.
Sides are cut in matched pairs, so any cumlitive error is eliminated.
Granted you need to make a jig for each joint size, but that's a 10 minute job.
Guess I'm from the KISS school.

Now that sounds interesting.

you
That's a possibility, but I can't imagine needing anything other than 1/8, 1/4, 3/8, 1/2 & 3/4.
Lew

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• posted on February 12, 2008, 9:58 am
wrote:

The more adjustment the more opportunity for maladjustment? Yep, sometimes the foreplay isn't worth what you get.

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• posted on February 12, 2008, 4:10 pm
That variable version is probably a version of one of these:
http://www.shopnotes.com/plans/box-joint-jig / or http://www.shopnotes.com/plans/box-joint-jig-multiple-fence-system / or http://www.woodcraft.com/family.aspx?familyid182&refcode INAFFL
snipped-for-privacy@aol.com wrote:

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• posted on February 12, 2008, 12:55 am
snipped-for-privacy@aol.com wrote:

Oh dear. I think I've died and gone to heaven. I love that jig.
Tanus