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Blog entry by lance posted 09-18-2007 02:44 AM 891 reads 0 times favorited 9 comments Add to Favorites Watch

Hi Guys,

It’s 9-17-07 and I’m running a 5” by 24” piece of wood through my jointer. Instead of it cutting at an even thickness. It is coming out on a slope. About ½ inch in it is .66 thick and I stopped immediately. At about 1” in it is .73, at 12 inches it is .83 and at the other end it is .92 inches thick. At the beginning I’m putting most of the pressure on with my left hand. As soon as the paddle in my left hand is past the blades and there is room for the paddle in my right hand to move past the blades I keep all my pressure on the outfeed table. What am I doing wrong and how do I get this piece of wood the same thickness all the way along its 24 inch length?

Please feel free to call me at 302.328.8333 or email me your phone number and I will be happy to call you.

Thanks in advance for your help.

-- Bob Lance, DE



9 comments so far

View mot's profile

mot

4911 posts in 2790 days


#1 posted 09-18-2007 02:52 AM

Hey Bob,

Jointers will almost never produce a board of even thickness. Their job is to produce one flat side and a right angle flat edge. They take the bow, cup and twist out of the board by sequentially flattening it. Uniform thickness is then achieved with the planer.

Tom

-- You can discover more about a person in an hour of play than in a year of conversation. (Plato)

View lance's profile

lance

170 posts in 2741 days


#2 posted 09-18-2007 03:27 AM

Hi Tom,

Thanks for the wakeup call. Why didn’t I figure that out. I feel so much better now.

Oh! I like your quote. My favorite one is “No problem can be solved at the level at which it is presented.” Albert Einstein.

Have a great day

-- Bob Lance, DE

View mot's profile

mot

4911 posts in 2790 days


#3 posted 09-18-2007 03:30 AM

No problem, Bob. Happy to help!

-- You can discover more about a person in an hour of play than in a year of conversation. (Plato)

View Karson's profile

Karson

34916 posts in 3154 days


#4 posted 09-18-2007 04:01 AM

Bob Once you get one flat side and one 90 deg edge. Stop using the jointer.

Then go to the planer.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware karson_morrison@bigfoot.com †

View Mark A. DeCou's profile

Mark A. DeCou

1999 posts in 3159 days


#5 posted 09-18-2007 02:51 PM

the advice you have been given already is accurate. You can not get a consistent thickness on a board by jointing both sides. Your technique of shifting the weight on the board as it passes the blade is correct.

The jointer gives you the first flat face. To get a parallel face on the opposing side, use a surface planer. When I do this, my digital caliper measuring tool will usually only vary about 0.001” on the thickness measurement, which has worked for me. I use a small DeWalt 12.5” surface planer, and so I don’t know if other brands would be more accurate, or not.

-- Mark DeCou - American Contemporary Craft Artisan - www.decoustudio.com

View Thos. Angle's profile

Thos. Angle

4438 posts in 2716 days


#6 posted 09-18-2007 03:16 PM

I agree with all. My DeWalt 735 is very accurate as well. I just measure with a ruler. I don’t want to know as much as a digital caliper might tell me. Maybe that’s why Mark’s pieces are so good.
Tom A.

-- Thos. Angle, Jordan Valley, Oregon

View coloradoclimber's profile

coloradoclimber

548 posts in 2821 days


#7 posted 09-18-2007 04:11 PM

Lance,

While everything said here is true, a jointer only produces a flat face, not a parallel face, it should not cut a taper. If you’re cutting a taper check that your out feed table is not too high. Too low outfeed gives you snipe, too high cuts a taper. The outfeed should be just level, or just slightly below, the top most position of the knives.

I set my outfeed maybe a mil or so below the top of the knives. I place maybe a 3/4 by 3/4 by 8 inch flat block of wood on the outfeed table and hanging out over the knives. I rotate the knives and when the knives just barely drag the block thats where I leave it.

View Thos. Angle's profile

Thos. Angle

4438 posts in 2716 days


#8 posted 09-18-2007 05:01 PM

OK, Bob, American Woodworker Magazine #123, Sept. 2006, Pg.61 It’s got it all!!
Tom

-- Thos. Angle, Jordan Valley, Oregon

View lance's profile

lance

170 posts in 2741 days


#9 posted 09-19-2007 05:34 AM

Hi Guys,

It is so great having a team of pros like all of you to help a neophyte like myself. Thanks for all your help. I will check out my jointer’s adjustments tomorrow and I will be sure to put my Makita planner back to work.

Have a great day,

-- Bob Lance, DE

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