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Hourglass cuts on sawmill

Started by JHand080, July 22, 2022, 10:31:19 PM

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Peter Drouin

#25
November 20, 2022, 07:08:06 AM
With the logs laying for 2 years, one face getting the all the sun. I think it would dry out the sun face, making stress in the log.
A&P saw Mill LLC.
45' of Wood Mizer, cutting since 1987.
License NH softwood grader.

YellowHammer

#26
November 20, 2022, 07:38:27 AM
Sometimes I'll have some boards as carrot peeled as SawyerTed's and I'll lay them out on a scrap pile, customers will see them and ask why they bowed that bad.  I just tell them that anybody can cut a straight board but it takes a "special" kind of sawmiller and years of experience to cut McDonalds arches of that quality!
YellowHammerisms:

Take steps to save steps.

If it won't roll, its not a log; it's still a tree.  Sawmills cut logs, not trees.

Kiln drying wood: When the cookies are burned, they're burned, and you can't fix them.

Sawing is fun for the first couple million boards.

Be smarter than the sawdust

Peter Drouin

#27
November 20, 2022, 07:40:51 AM
Quote from: YellowHammer on November 20, 2022, 07:38:27 AM
Sometimes I'll have some boards as carrot peeled as SawyerTed's and I'll lay them out on a scrap pile, customers will see them and ask why they bowed that bad.  I just tell them that anybody can cut a straight board but it takes a "special" kind of sawmiller and years of experience to cut McDonalds arches of that quality!


:D :D :D :D :D :D :D
A&P saw Mill LLC.
45' of Wood Mizer, cutting since 1987.
License NH softwood grader.

Magicman

#28
November 20, 2022, 07:56:10 AM
 

 Not a record setter but still in the running for a prize.  8)
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

It's Weird being the Same Age as Old People

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

moodnacreek

#29
November 20, 2022, 09:53:47 AM
Quote from: Magicman on November 20, 2022, 07:56:10 AM


 Not a record setter but still in the running for a prize.  8)
This one photo tells  the story in softwood. The opposite will happen in hardwood often. It appears the sawyer is trying to salvage a rotten log by taking a thick slab off and that is releasing much tension, so much it breaks off before the saw can finish. The sawyer will expect this because it happens all the time.  Softwood and hardwood are different and hardwood is the stronger and more difficult.  Think of the tree as a 4" pole [the heart] standing vertical only because the wood around it is holding up straight. Saw off a slab and it leans or pulls. [then you turn it 180 and slab the other side to straighten it and so on]

Brad_bb

#30
November 21, 2022, 10:19:17 PM
The OP needs to confirm if this IS what he is seeing or NOT.  I find it hard to believe 6 logs of different species would all do this.  I've had plenty of logs dry in the sun, but now seen that kind of consistent problem.
Anything someone can design, I can sure figure out how to fix!
If I say it\\\\\\\'s going to take so long, multiply that by at least 3!

moodnacreek

#31
November 22, 2022, 08:24:35 AM
Well if it is not tension in the wood the cant is moving. The band saw can cut a curve but that won't make the board pop up.

FactorySeconds

#32
November 29, 2022, 09:00:00 AM
A good way to rule out the mill would be to check the flatness of the piece below the cut, if it's perfectly flat, it's the wood.
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