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Forum topic by ajosephg posted 01-06-2010 03:00 AM 1113 views 0 times favorited 19 replies Add to Favorites Watch
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ajosephg

1853 posts in 2216 days


01-06-2010 03:00 AM

Topic tags/keywords: question planer milling delta 12 inch planer

When I plane a board (with an older Delta 12 inch portable planer) I typically run it through again in the opposite direction (without making any adjustments) to cancel out any side to side thickness variations.

On the second pass it still throws out a considerable amount of shavings. It takes at least 4 to 6 passes before it quits cutting. Somehow I don’t think it is unique to this planer, but I am curious as to what is going on and if anybody has any theories.

Does the wood spring back, does the planer flex somehow, or what?

Additional information:
1. It doesn’t make any difference between sharp or dull blades.
2. It makes smooth cuts (assuming good blades)
3. It has always done it

-- Joe


19 replies so far

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PurpLev

8476 posts in 2304 days


#1 posted 01-06-2010 03:06 AM

hmm, I definitely dont get that with the dewalt 13” planer – and I tried it.

I would be curious to measure with a dial gauge the thickness of the lumber after each of the passes – and try to match it to the planer’s and your preferred settings, and maybe get an idea of what is going on there, does the cutterhead more around… or anything in that sense.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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mtkate

2049 posts in 1980 days


#2 posted 01-06-2010 03:07 AM

I don’t have the answer, but I do exactly the same as you for a different reason: the attempt to eliminate planer snipe ... and I still always end up with planer snipe but at least it makes it less dramatic.

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Julian

880 posts in 2181 days


#3 posted 01-06-2010 03:08 AM

My guess is that the planer keeps on lowering itself. When I run my dewalt 735 planer, if I run a board through a second time, it doesn’t take off a shaving at all. Sounds like you need a carriage lock of sorts to fix it.

-- Julian, Park Forest, IL

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ajosephg

1853 posts in 2216 days


#4 posted 01-06-2010 03:24 AM

Since your Dewalt’s don’t do it that eliminates the wood spring back theory.

Juliian: If mine is lowering itself, it is doing it in a stealthy mode, because the thickness crank does not move.

Purplev: I’ve turned out the lights for today, but I’ll check the lumber thickness tomorrow as you suggested.

Mtkate: LOL – I gave up on eliminating snipe long ago. I just make sure that I start out with stock about 6 inches longer than I need.

-- Joe

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a1Jim

112093 posts in 2232 days


#5 posted 01-06-2010 03:29 AM

Hey Joe
I would say the same thing Julian said. It shouldn’t be necessary to reverse the board if you have jointed the board first.

-- http://artisticwoodstudio.com Custom furniture

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mtkate

2049 posts in 1980 days


#6 posted 01-06-2010 03:32 AM

I’m cheap with good wood :)

This is a great post. I was thinking it was “normal” that the planer kept taking of bits when you passed it through several times at the same level. Hmmm…

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matt garcia

1830 posts in 2327 days


#7 posted 01-06-2010 03:36 AM

Are you jointing the face flat before you run the other side through planer?

-- Matt Garcia Wannabe Period Furniture Maker, Houston TX

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Scott Bryan

27251 posts in 2477 days


#8 posted 01-06-2010 03:36 AM

Joe, my Delta 22-580 doesn’t do this either. I will make a second pass without changing the depth when I have reached final thickness just to make sure all my boards are exactly the same but the material removed in the final, what I would label as a clean-up pass, is only a few thousandths at best.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine

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ajosephg

1853 posts in 2216 days


#9 posted 01-06-2010 03:45 AM

Scott & Jim – yes, I am starting with jointed boards that are not warped.

BTW – let me emphasize that this is not a new problem, its been doing it for years on all types of wood and thicknesses. I just finally decided to see if it can be fixed.

-- Joe

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bill1352

130 posts in 1777 days


#10 posted 01-06-2010 04:36 PM

a guy at Delta told me to tighten the 2 bolts under the planer. there is 1 on each outside edge. these control the rollers. he said it should be hard to turn the height adjustment handle. the reason for this was to help stablize the rollers and help reduce snipe. i was getting the same thing with my newer delta. i still get a bit of shavings but not as much. third pass is good. not much help on snipe but if you put a little upward pressure on the board on the outfeed side (again his idea) it does remove almost all the outfeed side snipe. finger tips only as the board comes off the outfeed table. if you call the delta tech line they will go thru it with you.

-- Keep Your Stick On The Ice

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ajosephg

1853 posts in 2216 days


#11 posted 01-06-2010 05:23 PM

Thanks Bill, I’ll check that out.

-- Joe

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patron

13034 posts in 1996 days


#12 posted 01-06-2010 05:37 PM

joe ,
i think what happens ,
is that the cutter being in the middle of the 2 rollers ,
as the board hits the first roller ,
it moves up raising the cutter also ,
( this is when snipe happens )
when it hits the second one it rises again .
then as it passes the 1st roller that side drops down ,
and the cutter with it .
( snipe again )
leaving a ’ crown ’ in the middle of the board ,
this may continue until the rollers don’t move up anymore ?

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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gizmodyne

1763 posts in 2745 days


#13 posted 01-06-2010 05:50 PM

Does this happen if you run it through in the same direction?

I generally would not swap the board end for end, because of the danger of grain tear out. Not sure if that is part of the issue though.

-- -John "Do I have to keep typing a smiley? Just assume it's a joke." www.flickr.com/photos/gizmodyne

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Rick Dennington

3404 posts in 1850 days


#14 posted 01-06-2010 06:06 PM

Hey neighbor, and fellow Arkey: Joe, just read your post on the planer. I also have an older Delta 12” . I was getting the same similar thing happening to mine. Like you said—for years it did it. I made several adjustments, which helped a little, but didn’t cure the problem all together. Make the fine adjustments like Bill1352 suggested, but do this also: Raise the head all the way up as high as it will go. Look at your rollers—I bet they have sawdust chips embedded in them. Take some alchohol, soak a rag, and wipe down the rollers really good. Hit the on button quickly to turn the rollers, wipe, hit the button, turn rollers. Do this till both rollers are clean all the way around.
While the rollers dry, polish the bed and outfeeds with paste wax. This may take care of some of the problem.
May not cure it, but the board will feed soooo much better. I think the sawchips in the rollers makes the board raise up a touch. May or may not work, but you’ll have gotten eveything clean. It worked for me….. luck…

-- " I started with nothing, and I've still got most of it left".......

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TheDane

3783 posts in 2318 days


#15 posted 01-06-2010 06:31 PM

I do pretty much what Rick suggested a couple of times a year … oftener if I have been running softer stock through my planer.

I have a DW733 and if the stock I am planing does not have a jointed face running face-down through the planer, the planer keeps taking fine shavings without changing height for several passes. Reversing the stock has resulted in some really nasty tear-out (especially in red oak and maple), so I don’t do that any more.

If I run the stock through my jointer first, the planer behaves and I don’t have to make repetitive passes.

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

showing 1 through 15 of 19 replies

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