Biscuit joint - Woodworking Talk - Woodworkers Forum
 
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post #1 of 6 Old 03-01-2016, 01:23 PM Thread Starter
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Biscuit joint

I'm connecting two pieces of 1/2" plywood on edge, one edge has an 11.5 degree bevel and the other is 90 degrees. I need it flush on the inside of the bevel. How do I set up my DeWalt DW682 for this joint. All info I've seen has both edges beveled and that is not an option.
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post #2 of 6 Old 03-01-2016, 09:22 PM
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One issue you will run into is that that the beveled edge will have more surface area than the edge cut square, thanks to Pythagoras.

To make the inside edge flush, I'd cut another board at the same angle and use it to align the 2 boards. Similar to how you would use a square on a 90 degree joint.
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post #3 of 6 Old 03-01-2016, 09:48 PM
where's my table saw?
 
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you will have to butt them, not miter

As stated the bevel edge will be longer than a square edge. So I would butt them, that is lay the bevel on top of the surface of the 90 degree board. The biscuit would be at 90 degrees on the square edge and at 90 degrees to the bevel on the other. That will be the challenge. You will need a jig to hold the beveled board 11 degrees off the table while you run the biscuits in.... nothing fancy just a support with a brace. Hot glue is your friend in this case. Just a dab will secure the board and then lift it to the 11 degree, run a scrap under it and hot glue that down.

I run my biscuits using the base on the table surface as the platform, not the fence working from above. I don't like the fence gettin' in the way... that's just me.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #4 of 6 Old 03-02-2016, 07:58 AM Thread Starter
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Hmm, regestering seems to be my problem. Also note the 90 degree edge is a 4X12 foot sheet already glued and screwed to the boat I'm building and the 11 degree edge is a 2X8 sheet. Not small parts. I'm going to take another swing at it today, test joints are off by 1/16"-1/8" if no joy then on to plan B, butt blocks. Thanks all.
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post #5 of 6 Old 03-02-2016, 08:28 AM
where's my table saw?
 
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OK, then

Use a router and straight bit and run the width of the installed sheet to create a slot to accept a spline. Make a wedge block at 11 degrees, for the bottom of the router base to create another slot on the beveled edge using a slot cutter bit. Make a spline to fit into the slots. That will keep the parts from slipping while you glue up and make the joint much stronger.


The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 03-02-2016 at 08:32 AM.
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post #6 of 6 Old 03-02-2016, 08:52 AM
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If the angle on the part butting up to the bottom is actually 11.5 degrees that is a pretty shallow angle. I would be inclined to run the biscuits parallel with the face and mortise the biscuits in at 11.5 degrees on the bottom.

I think what you are doing though is the side is 11.5 degrees to the bottom which makes the angle miter at 78.5 degrees. That would be too sharp to put biscuits in. You would be better off just to glue and nail it. To have attempted biscuits both pieces would need an equal miter.
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