Joiner Technique

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Forum topic by chip73 posted 05-16-2012 12:22 AM 1312 views 0 times favorited 7 replies Add to Favorites Watch
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56 posts in 2446 days

05-16-2012 12:22 AM

Topic tags/keywords: question jointer joining

I am wanting to join plywood at a 90 degree joint. Putting the biscuit in the end of the plywood is a no brainer, but on the plywood I am attaching to will be in the middle. I know it would be easier with a dado but right now I don’t have one or the money to buy one. My question is what is the best technique to do this. I have a PC 557. I put a straight edge about 3/8 off my center line and I was pretty close but not precise, just looking for ideas or suggestions.

-- Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of facts and evidence.

7 replies so far

View intheshop's profile


58 posts in 3072 days

#1 posted 05-16-2012 01:23 AM

You’re on the right track. It’s just gonna take some trial and error. And if you’ve ever tried to edge join two pieces with biscuits you understand that they never really line up. I’ve never heard a satisfactory explanation for this little glitch with biscuit joiners. Good luck.

-- Fast is fine, but accurate is final. The real trick is learning to take your time when you're in a hurry. - Wyatt Earp

View Sawkerf's profile


1730 posts in 3302 days

#2 posted 05-16-2012 01:46 AM

The trick here is to NOT use the part of your biscuit joiner that controls the depth of the slot.

Mark the center of your slot on each piece. Sit your biscuit joiner plate on a flat surface and make your first slot. Sit the other piece of wood on its edge and make another slot. Since you’re registering from the same surface, the slots should align just right.

-- Adversity doesn't build reveals it.

View Lee Barker's profile

Lee Barker

2170 posts in 3084 days

#3 posted 05-16-2012 01:56 AM

Clamp a straight edge (3/4” board) on your plywood, enough south of the liner so the cutter lands right on your line. Register the base of the router to the straightedge and you should be fine.

Cole, the reason you have problems with alignment is the cutter is not exactly parallel with the fence of the machine. If it is .01 inches off, when you turn the machine around to cut the mating surface, the two slots will be .02 out of parallel.

My Lamello is dead on parallel and my DeWalt is darn close. I never have problems with alignment.



-- " his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Bobmedic's profile


381 posts in 3035 days

#4 posted 05-16-2012 08:58 AM

What about using a router and doing a half lap?

View Don W's profile

Don W

19034 posts in 2801 days

#5 posted 05-16-2012 11:49 AM

I agree with everything said but will add, if you have a router you can do a dado, if you have a decent circular saw you can do a dado, if you have one sharp chisel and a hand saw you can do a dado.

-- - Collecting is an investment in the past, and the future.

View chip73's profile


56 posts in 2446 days

#6 posted 05-17-2012 12:28 AM

Thanks for the info. It looks like a little practice I can get my biscuits to line up. And keeping my ears open I guess I do have a dado I just need to think outside my narrow little world. Thanks again.

-- Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of facts and evidence.

View crashn's profile


528 posts in 2699 days

#7 posted 05-17-2012 12:34 AM

you dont need a dado blade set to make dado’s. make a kerf maker (i know, but I use mine) and it cuts the exact width dado for you, just in several passes.

Or use the router to make a dado slot, but you did not mention if you had a router :)

-- Crashn - the only thing I make more of than sawdust is mistakes

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