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Author Topic: Reverse Roll Quarter Sawing  (Read 29264 times)

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Offline D6c

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Re: Reverse Roll Quarter Sawing
« Reply #60 on: February 12, 2017, 06:40:39 PM »
You're getting some beautiful looking oak with that method.
One question....wouldn't that be more what you'd call rift sawing?
Like this: http://www.hardwooddistributors.org/blog/postings/what-is-rift-sawn-lumber/

Offline Ga Mtn Man

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Re: Reverse Roll Quarter Sawing
« Reply #61 on: February 12, 2017, 07:02:23 PM »
That looks like text-book quarter-sawn lumber to me...rings at 90 to the cut face.
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Re: Reverse Roll Quarter Sawing
« Reply #62 on: February 12, 2017, 08:36:46 PM »
D6c, that picture has been shown before.  The top picture is rift sawn, and the bottom illustration is quarter sawing not rift.
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Offline Darrel

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Re: Reverse Roll Quarter Sawing
« Reply #63 on: February 13, 2017, 12:44:28 AM »
Not everything you read on the internet is correct.
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Offline D6c

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Re: Reverse Roll Quarter Sawing
« Reply #64 on: February 13, 2017, 12:50:25 PM »
D6c, that picture has been shown before.  The top picture is rift sawn, and the bottom illustration is quarter sawing not rift.

You're right....seems like I've seen another place that had it backwards like that too.

Offline footer

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Re: Reverse Roll Quarter Sawing
« Reply #65 on: February 13, 2017, 03:38:01 PM »
I couldn't tell you how many places on the internet I have seen that picture, or similar, with someone arguing that the bottom picture is rift sawn. Here is a long thread form years back on this exact same thing.
http://www.forestryforum.com/board/index.php?topic=79020.0

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Re: Reverse Roll Quarter Sawing
« Reply #66 on: February 13, 2017, 07:04:02 PM »
You're getting some beautiful looking oak with that method.
One question....wouldn't that be more what you'd call rift sawing?
Like this: http://www.hardwooddistributors.org/blog/postings/what-is-rift-sawn-lumber/

     What kills me is they're suggesting this to avoid the medullary rays.  Different strokes for different folks, I guess.
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Offline YellowHammer

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Re: Reverse Roll Quarter Sawing
« Reply #67 on: February 13, 2017, 10:59:08 PM »
For hardwood lumber, quartersawn has three definitions.  Perhaps the most useful comes from the National Hardwood Lumber Association.  It applies to species with the ray fleck pattern on a radial surface.  If the fleck is visible on 80% of the surface (used for grading), then the piece is quartersawn.  This definition certainly helps satisfy the customer's desires when they quest quartersawn. In order to get the fleck pattern the annual growth rings, when viewed from the end grain, need to be between 75 to 90 degrees to the face...not part of the definition but rather what will exist.

With my customers, this is the definition that applies when they are paying for the more expensive QS wood.  If it doesn't have ray fleck, it's not what they want. 

Thats one of the interesting things about marking the rays, its very educational to see just how far off angle the QS ray fleck will show.  On some logs, there is a lot of forgiveness and almost no correction wedge cuts need to be made.  On other logs, they are very tight and unforgiving, and it's very easy to lose the ray fleck. 

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Offline WDH

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Re: Reverse Roll Quarter Sawing
« Reply #68 on: February 14, 2017, 07:39:54 AM »
No matter the angle, I do not consider oak quartersawn unless there is ray fleck. 
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Offline Larry

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Re: Reverse Roll Quarter Sawing
« Reply #69 on: February 14, 2017, 01:50:10 PM »
Happy Birthday YH :)

Thats one of the interesting things about marking the rays, its very educational to see just how far off angle the QS ray fleck will show.  On some logs, there is a lot of forgiveness and almost no correction wedge cuts need to be made.  On other logs, they are very tight and unforgiving, and it's very easy to lose the ray fleck.

A little picture of burr oak where rays are nice and fat.  Makes sawing for fleck a lot easier.



YH has come up with a method to maximize figure by putting more effort and time into sawing.  I think its a great idea to insure each board shows its full figure.  I bet those boards make a nice return on effort. :)
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Re: Reverse Roll Quarter Sawing
« Reply #70 on: February 14, 2017, 08:05:50 PM »
Larry,

That is a great pic. 
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Re: Reverse Roll Quarter Sawing
« Reply #71 on: February 14, 2017, 08:36:44 PM »
If only I would've had all this info before I sawed up all my black oak. I have some good figure but I could have done better.
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Offline YellowHammer

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Re: Reverse Roll Quarter Sawing
« Reply #72 on: February 14, 2017, 11:53:00 PM »
Larry,

That is a great pic. 
Yes. Very good. 
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Offline flatrock58

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Re: Reverse Roll Quarter Sawing
« Reply #73 on: February 15, 2017, 09:38:30 AM »
Yellowhammer
I cut a couple of large oak logs this week and used a couple different methods.  Haven't tried your method yet.  I ended up with about 50% quartersawn and the rest were rift sawn.  I was wondering what percent most people get that is QS and how your Reverse roll method does?
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Offline YellowHammer

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Re: Reverse Roll Quarter Sawing
« Reply #74 on: February 15, 2017, 10:49:07 PM »
Yellowhammer
I was wondering what percent most people get that is QS and how your Reverse roll method does?
That's the point of this technique, the goal is to get every single board to show ray fleck.  Also, the exploratory wedge cuts on the narrow sides of the log half are to confirm that the angle and geometry of the cut is good and will show fleck, before wide boards are sawn.  On most conventional techniques, the first cuts are made through the wide part of the log half to make quarters, and these boards are sawn widest down to narrowest.  So misses can occur on the widest boards.  Using the technique I'm using, as I'm sawing narrowest to widest, I know for sure, board after board, will have ray fleck.  No guessing.
So in reply 43, I showed every cut on the half log, which was about 30 inches in diameter.  Every board came off with fleck, except a narrow starter wedge. 
It may not be the fastest technique, but I don't think it's slower than any other, and my stress level goes way down, as I know I'm in good wood the whole log. 
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Offline flatrock58

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Re: Reverse Roll Quarter Sawing
« Reply #75 on: February 17, 2017, 07:29:24 PM »
Yellowhammer,
I guess I assumed you didn't get QS on every board.  How much waist is there with all the times you cut wedges?  I will have to try it.  You are getting some really nice QS boards!
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Re: Reverse Roll Quarter Sawing
« Reply #76 on: February 17, 2017, 10:55:11 PM »
The waste varies from log to log.  It just depends in how forgiving the log is.  The main thing is to never lose it, just as it starts thinning, rotate the log, and get back in it. 
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Offline scsmith42

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Re: Reverse Roll Quarter Sawing
« Reply #77 on: February 20, 2017, 11:14:03 AM »
Very insightful technique - thanks for sharing.

One other benefit of this method is that every board is at maximum width.  With other methods of QSing you will end up with a mix of board widths.
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Re: Reverse Roll Quarter Sawing
« Reply #78 on: February 22, 2017, 12:24:05 AM »
Yes, you are correct, this gives a much higher percentage of wide boards. 
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Offline kelLOGg

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Re: Reverse Roll Quarter Sawing
« Reply #79 on: February 28, 2017, 08:18:39 PM »
I tried it with my manual MP32 on a knotty 16" short white oak. Not much to be lost if I screw up. I halved the log and cut two 16" QS boards just above the pith and the remainder I sawed ala reverse QSing.

My cam clamps did a good job of reverse rolling the cant. (Not shown is a wedge behind the log to at as a stop.)
 

 

First triangular waste piece.
 

 

Thin waste piece coming off.
 

 

Sawing off the bottom for the last piece.
 

 

QS lumber ranged in width from 3 to 5 inches. Looks to me like there is still some rift sawn but for the 1st time I am pretty pleased.
 

 

The waste is on the left.
 

 

Comments/suggestions welcome.
Bob

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