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jointer technique question

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Forum topic by mstenner posted 1397 days ago 1658 views 1 time favorited 8 replies Add to Favorites Watch
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mstenner

57 posts in 1787 days


1397 days ago

Topic tags/keywords: jointer milling

I just got my first jointer (a Jet JJP-12HH, first planer too, for that matter) and am so far pleased. I’ll post a review after a bit more time with it. I have a technique question, though. I’m sure I have the basic technique down, but I suspect I’m doing something a bit wrong.

When face-jointing, I get a “bump” about 8 inches back from the leading edge of the board. I suspect it happens when I perform a less-than-perfect hand-off from pressure on the infeed side to the outfeed side. On one board, I tried running it through in both directions, which worked, but clearly isn’t a good idea with less friendly grain orientation.

Do others get this bump? Is there a trick to how you do your “hand-off”?

-- -Michael


8 replies so far

View snowdog's profile

snowdog

1132 posts in 2616 days


#1 posted 1397 days ago

Are you talking about “snipe”? If you are then yes many of us have the problem :)
Take a look at this post:
http://lumberjocks.com/topics/12326

-- "so much to learn and so little time"..

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mstenner

57 posts in 1787 days


#2 posted 1397 days ago

snowdog: no, it’s not really snipe. First, this is a jointer, not a planer (well, the machine is both, but I’m using it in jointer-mode). Second, it’s not a too-deep cut for the first couple inches. It’s a too-shallow cut from inch-8 to inch-12 or so.

BoiseJoe: I might be applying pressure too near the blades. There’s a guard directly over them, but I am applying pressure a couple inches away (on the infeed side first, then switching to outfeed). Should I not apply pressure so close? I’m pretty sure the outfeed table is not too high. I tuned it so that a straightedge on the outfeed table just barely touches the blade (I can hear the “whisk-whisk” sound, but it doesn’t lift the straightedge).

-- -Michael

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mstenner

57 posts in 1787 days


#3 posted 1397 days ago

BoiseJoe: Thanks, I’ll give it a shot. I’m slightly dubious that the particular alignment you describe (relative height of cutter and outfeed table) can remain dead-on when switching back and forth between modes. So it’s possible that it’s shifted a bit. Since this is the first time I’ve tuned a jointer, it’s also possible I just screwed it up!

-- -Michael

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mstenner

57 posts in 1787 days


#4 posted 1397 days ago

Well, I just had the thing shipped across the country and slid down the steps into my basement, so I wasn’t shocked that it needed a little love!

-- -Michael

View Gene Howe's profile

Gene Howe

5555 posts in 2062 days


#5 posted 1397 days ago

My technique is to only apply enough pressure on the infeed end to keep it against the fence and on the table. That way when I switch to the outfeed end, there a less abrupt change of pressure.
Caveat: the outfeed table must be dead on even with the cutters. Mine is fixed, so I don’t have that adjustment to worry about.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View Lochlainn1066's profile

Lochlainn1066

138 posts in 1410 days


#6 posted 1395 days ago

I’m tossing around the idea of selling my jointer. I can’t use the thing worth spit. I’m faster with hand planes. I can’t get it set accurately for some reason and it always ends up bowing the board across either width or length and I sure can’t get rid of twist. I only make it worse.

With a #5 jack and a scrub plane I can do it faster, quieter, and get a workout.

Lest I sound like a hand tool snob, you can pry my cheapie Delta 12” planer from my cold, dead hands. Or unless you trade me for a bigger one! :)

-- Nate, thegaragestudio.etsy.com

View Cato's profile

Cato

641 posts in 1946 days


#7 posted 1395 days ago

Charles Neil has a very good you tube video for techniques on the jointer. i watched it twice and then I had it down pretty well. Let the jointer do the work and don’t overly apply pressure.

After I get a few inches of board past the cutter head of the jointer I apply pressure only to the outfeed table and drag the remainder of the board over the cutter head. Gradually with more passes it will begin to cut the entire length.

I like using the jointer and watching it straighten and flatten a board.

View Camper's profile

Camper

232 posts in 1489 days


#8 posted 1395 days ago

hi, i recently got a used jointer (my first one) and a fellow LJ sent me this link which I think is one of the better publications out there talking about jointing techniques. Do not let the fact that its for a very old craftsman jointer turn you off. The techniques are applicable across the board and I think I learnt a great deal from it. Hope it helps.

-- Tampa-FL

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