Jointing Technique

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Forum topic by TheWoodenOyster posted 07-02-2013 11:12 PM 1155 views 0 times favorited 9 replies Add to Favorites Watch
View TheWoodenOyster's profile


1317 posts in 2177 days

07-02-2013 11:12 PM

Topic tags/keywords: jointer joining

Hey guys,

I have noticed a weird pattern when I use my jointer. If I am jointing a 4 foot board, I can feel/hear material being removed for the first 3 feet or so, then the blades stop touching the wood and cease to remove any material. Anybody got any ideas on what this could be? I am pressing down pretty hard right as the board hits the outfeed table to keep the board flat on it.

Also, any general tips that you guys have learned for jointing would be much appreciated.


-- The Wood Is Your Oyster

9 replies so far

View Woodendeavor's profile


276 posts in 2848 days

#1 posted 07-02-2013 11:17 PM

Check the two tables for coplanar, sounds like the outfeed table is sagging to me

View Loren's profile


10477 posts in 3890 days

#2 posted 07-03-2013 12:39 AM

Assuming the board isn’t just real crooked, a sagging outfeed
table can cause this effect. The infeed and outfeed tables
should be close to co-planar, though a hair of sag on the
outfeed table is okay as it produces sprung joints and
no real problems with other jointing.

There are dovetailed gibs the tables usually ride on and
there will be grub screws with jam nuts on them or
something like that. These take up play in the table
movement, but also tightening them can in some
cases correct sagging.

View gfadvm's profile


14940 posts in 2932 days

#3 posted 07-03-2013 01:58 AM

The sagging outfeed table may be the culprit BUT I had this same problem before I learned to joint the concave side of the board (rather than the convex side). Now I remember to “joint the frown side”, not the “smile side”.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Grandpa's profile


3261 posts in 2917 days

#4 posted 07-03-2013 02:53 AM

That is good advice. Frown down. It sounds like you might have the outfeed table a little low. I had a similar problem and even threatened to throw that boat anchor into a lake. If found and fixed the problem and 305 years later I still own that jointer.

View pintodeluxe's profile


5820 posts in 3055 days

#5 posted 07-03-2013 04:15 AM

1+ set tables coplanar within .002”. Multiple passes on a joiner that is not coplanar will create tapers.
Then crown the boards concave side down. A board jointed with the concave side up may never achieve a flat face.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View Loren's profile


10477 posts in 3890 days

#6 posted 07-03-2013 05:39 AM

Also – working with a jointer you have to learn to
take partial passes on specific areas to work the
edge to close enough to straight so you can take
a finishing pass and get the whole edge in one
go. Sight down the board or use a straight edge
to identify the high spots and remove those first.

Sometimes you’ll get into trouble if you aren’t
paying attention and you’ll find yourself tapering
away the board without realizing it.

View TheWoodenOyster's profile


1317 posts in 2177 days

#7 posted 07-03-2013 12:08 PM

All good advice.

I tried to calibrate my table jointer as soon as I got it. I did the best I could with what I had, but I didn’t have much. I still need a 4 foot straightedge and one of those overpriced deals to help you set your knives in cutterhead.

I will also make sure to put the “frown down”. I knew this rule, but maybe I wasn’t paying close enough attention. I easily could have been putting the “smile down”

Grandpa – as far as the table being low, that could also be the culprit. I set my depth of cut really shallow because it makes the process a little quieter and more controllable. Could be I went so shallow that I went negative…

-- The Wood Is Your Oyster

View fredj's profile


186 posts in 2059 days

#8 posted 07-03-2013 12:25 PM

If you look online there are a lot of very detailed instructions on how to adjust jointer tables. You may even find one for the jointer you have.

-- Fredj

View Woodendeavor's profile


276 posts in 2848 days

#9 posted 07-03-2013 12:34 PM

You talk about needing tools to set you jointer. I used a factory edge on a sheet of plywood to set the tables and have had no problems

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