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Author Topic: First big project  (Read 1951 times)

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Offline Magicman

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    • Knothole Sawmill
Re: First big project
« Reply #20 on: January 29, 2013, 05:56:12 PM »
No, not to prevent warping.  As boards are removed and the stress is relieved on that side of the cant, the cant ends will lift up off of the sawmill bed.  This will give you thicker board ends because you are "stealing" wood from the bottom (dog) board.  If you see any daylight under the cant end, turn it 180, re-clamp, and take the next board off.  Sometimes the cant will now behave, and sometimes it has to be turned again.  And sometimes after each board is removed.

I often have my helper stand on the center of the flipped cant to get the center in firm contact with the sawmill bed before re-clamping.  I have had a couple of folks standing up on the cant, and if all else fails, I have a very large pipe clamp that I have used to squeeze the cant down before clamping.

Your goal is to produce uniform thickness lumber.  In the picture below, I failed to notice the cant raising up off of the sawmill bed.  I flipped it, but it should have been done at least one board sooner.
 

 
Notice the gap under the cant.  This means that after the cant is flipped, the next board will only be 3/4" or 7/8" on that end instead of 1".
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

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Offline Ocklawahaboy

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Re: First big project
« Reply #21 on: January 29, 2013, 07:47:18 PM »
Thanks for the explanation.  These are super straight trees so hopefully I'll have less problems but i will watch out.  I have my first paying gig Saturday so that may help me with his stuff too.  It's just one white oak and one wild cherry log so I can take my time.  I told him it was my first job for someone else so hopefully he'll be understanding if one board ends up off. 


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