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Author Topic: Sawing Multiple Boards Between Offloading  (Read 1036 times)

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Offline Pepe_Silvia

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Sawing Multiple Boards Between Offloading
« on: November 14, 2020, 11:06:26 AM »
Using a LT15Wide.  Cutting a lot of wide, heavy slabs.  Can I cut multiple slabs without offloading and leave them stacked, or does the weight on top become an issue?  

I was doing it this way for a while because it was more efficient and then ran into some issues cutting a live oak log where it seemed like the blade was getting really hot and took a dive.  This might have been coincidental to leaving the slabs stacked (it was live oak, afterall).

Offline kelLOGg

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Re: Sawing Multiple Boards Between Offloading
« Reply #1 on: November 14, 2020, 12:03:46 PM »
I don't saw wide but I frequently off load after all is sawn. If the blade set has not worn down I don't think heating due to friction will be a problem. I haven't detected a warm blade on my mill but I don't saw as wide as you.
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Offline Southside

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Re: Sawing Multiple Boards Between Offloading
« Reply #2 on: November 14, 2020, 12:25:16 PM »
Not a problem to do that. The weight is not a factor as the kerf remains open from some of the sawdust left behind.  The dive was likely due to the band getting dull considering you were sawing live oak.  
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Offline WV Sawmiller

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Re: Sawing Multiple Boards Between Offloading
« Reply #3 on: November 14, 2020, 12:44:32 PM »
   I agree with Southside. It would appear to be no different in leaving a couple of extra 8/4 slabs on top than choosing to cut a 4" or 6" thick single slab the way I see it.

  I often leave several boards, slabs or flitches on top of the cant when sawing if it is more convenient than removing each at the time of cutting. The only slowdown I experience in doing so is the delay of having the raise the head a little higher before returning it to the front of the mill.
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Offline JoshNZ

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Re: Sawing Multiple Boards Between Offloading
« Reply #4 on: November 14, 2020, 01:33:21 PM »
If I'm sawing multiple boards off same log/cant I leave them there until I feel like the time spent climbing and falling the stack becomes less efficient than just offloading. Weight can help keep things straight if you're getting close to the bed too.

Offline donbj

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Re: Sawing Multiple Boards Between Offloading
« Reply #5 on: November 14, 2020, 02:21:14 PM »
I saw cants up all the time leaving the boards on til it's done. The blade cannot get pinched as the solid wood in front of the blade will not let it. The blades aren't wide enough to be a problem further back.
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Offline Larry

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Re: Sawing Multiple Boards Between Offloading
« Reply #6 on: November 14, 2020, 04:07:51 PM »
I've sawn well over a 1,000 slabs this year from 2 - 3" thick.  Up to 14' long and 32" wide.  I've learned slabs are heavy!  Some are too heavy for even two men to lift

Normal routine is to saw slabs from the top to close to the pith.  Rotate log up so the slabs slide off onto either the mill loader arms or the forklift forks.  Rotate the rest of the log 180 degrees and slab down to the bed.  Repeat the routine of sliding the slabs off the mill onto the loader arms.

I hardly ever lift even one end of a slab.  Its all push and slide work.

With your manual mill I would quickly figure out a system that would not require heavy lifting.
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Offline Walnut Beast

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Re: Sawing Multiple Boards Between Offloading
« Reply #7 on: November 14, 2020, 09:15:05 PM »
Nice tips Larry 👍👍

Offline Walnut Beast

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Re: Sawing Multiple Boards Between Offloading
« Reply #8 on: November 14, 2020, 09:20:53 PM »
Are you centering the pith in the middle of the last slab or making something different 

Offline Larry

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Re: Sawing Multiple Boards Between Offloading
« Reply #9 on: November 14, 2020, 09:39:01 PM »
I split taper and try to keep the pith in one slab.  Sometimes I make close misses but it doesn't seem to make much difference to the buyer.

My first consideration is getting the best figure out of the crotches, second is the widest slab possible, and third is the pith.

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We need to insure our customers understand the importance of our craft.

Offline ladylake

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Re: Sawing Multiple Boards Between Offloading
« Reply #10 on: November 15, 2020, 04:31:46 AM »
 With the rustic look now days I've had customers tell me they like the pith.  Steve
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Offline dougtrr2

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Re: Sawing Multiple Boards Between Offloading
« Reply #11 on: November 15, 2020, 08:53:06 AM »
I am not a sawyer, but had that same question after I had some logs sawn.  I was surprised that we didn't offload each board.  Later I ran across a Youtube video that was made to answer that question.  As part of the demonstration the sawyer made several cuts without off loading.  The he made a cut, shut the saw off and was able to back several inches into the cut just made.  That convinced me.

Doug in SW IA

Offline YellowHammer

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Re: Sawing Multiple Boards Between Offloading
« Reply #12 on: November 15, 2020, 09:03:13 AM »
I've learned slabs are heavy!  Some are too heavy for even two men to lift

Normal routine is to saw slabs from the top to close to the pith.  Rotate log up so the slabs slide off onto either the mill loader arms or the forklift forks.  Rotate the rest of the log 180 degrees and slab down to the bed.  Repeat the routine of sliding the slabs off the mill onto the loader arms.

I hardly ever lift even one end of a slab.  Its all push and slide work.
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When sawing big slabs, and lots of them, I change our normal technique and even reconfigure our roller tables when getting serious about slabbin'.  Last week, while taking a break, I pulled out the Forum calculator and figured I was sitting on a pallet full of 200+ pounders.  Multiply that by the 6 pallet fulls I'd already done that day, and more to come, definately take "steps to save step".  For scale, the short slabs on the back row were "only" 8 footers.

Sawing multiple boards before offloading is one of those steps.



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Offline Sixacresand

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Re: Sawing Multiple Boards Between Offloading
« Reply #13 on: November 15, 2020, 09:42:49 AM »
Normally, I flip the boards off the cant as I go, so I can inspect the last cut.  
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Offline SawyerTed

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Re: Sawing Multiple Boards Between Offloading
« Reply #14 on: November 15, 2020, 09:58:03 AM »
On portable jobs with good help, I dont saw multiple boards in a cant due to the time it takes to jog the head up at the end of the cut.  That time mounts up over the course of several hours.  For customers time = money.  Usually I like to cut one board, leave it on the cant until I start the next cut, off bearers pull the top board off (from behind me) as I cut the next and so on.  I stay one board ahead and it gives them time to clean, stack and sticker properly.

Sawing slabs is a different situation as has been pointed out already.  I often reposition the log after cutting 2 or 3 slabs off the top much as others have mentioned.
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Offline GAB

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Re: Sawing Multiple Boards Between Offloading
« Reply #15 on: November 15, 2020, 02:40:40 PM »
On portable jobs with good help, I dont saw multiple boards in a cant due to the time it takes to jog the head up at the end of the cut.  That time mounts up over the course of several hours.  For customers time = money.  Usually I like to cut one board, leave it on the cant until I start the next cut, off bearers pull the top board off (from behind me) as I cut the next and so on.  I stay one board ahead and it gives them time to clean, stack and sticker properly.

Sawing slabs is a different situation as has been pointed out already.  I often reposition the log after cutting 2 or 3 slabs off the top much as others have mentioned.
"That time mounts up over the course of several hours.  For customers time = money."  
If more customers were former students of time and motion study the boards would be moving the minute the saw blade breaks through.
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Offline WV Sawmiller

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Re: Sawing Multiple Boards Between Offloading
« Reply #16 on: November 15, 2020, 03:15:42 PM »
  I have tried the off-bearer behind me and no more. They tend to slow me down, I trip over them, they are a distraction and a safety hazard for me. The last mobile job I did I had the best help ever - the customer and his hired helper. They off loaded off the end and the loader side. I'd push the board on to the bed then back up and start the next cut.  One stack we made on the operator side and they unloaded those from that side. I almost always unload off the end vs the front of the mill. If I had and used a board return I'd have to revise my system but this works good for me. When working alone I park my tractor with the forks or my trailer near the end of the mill and slide the finished boards off onto it.
Howard Green
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Offline Magicman

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Re: Sawing Multiple Boards Between Offloading
« Reply #17 on: November 15, 2020, 06:23:32 PM »
Not only did I remove the board return from my sawmill, I do not allow any offloading, etc. behind me nor out of my sight.  That way I know where everyone is at all times.
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Offline forrestM

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Re: Sawing Multiple Boards Between Offloading
« Reply #18 on: November 15, 2020, 09:11:58 PM »
i have an lt15 wide, and I will often leave slabs on the mill until the throat has no more clearance. 

it seems like it is usually a time saver. however, like with your blade taking a dive - it you arent taking off and glancing at each each board, it's easy to continue sawing on a dull blade when you shouldn't be. I ruined a stack of wide poplar boards the other day by doing that. From my limited experience, wide cuts will really exaggerate a dull blade and it seems like they will go from kind of dull, to terrible in an instant. 


Offline Chuck White

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Re: Sawing Multiple Boards Between Offloading
« Reply #19 on: November 16, 2020, 08:19:25 AM »
I have let boards stack on the cant until the cant was completely sawn!

I have done so when the cant would be inclined to move after each cut!  :)

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Offline kantuckid

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Re: Sawing Multiple Boards Between Offloading
« Reply #20 on: November 16, 2020, 08:45:05 AM »
Going back to the heavy lifting part- I'm at the age when I don't lift many multiple boards- maybe the 1x4's :D
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Offline DocGP

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Re: Sawing Multiple Boards Between Offloading
« Reply #21 on: November 16, 2020, 10:23:44 AM »
One of the best nuggets I have heard on this board is "Don't lift both ends of the wood at the same time".

Sounds simple, but much country boy logic in that!!

Doc
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Offline GAB

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Re: Sawing Multiple Boards Between Offloading
« Reply #22 on: November 16, 2020, 11:15:00 AM »
When sawing battens for example I will saw through the entire cant that has the correct width for the number of cuts and saw kerfs involved for the size battens desired then I just flip the whole stack 90 and saw the width of the battens requested.
The only time I off bear is if there is not enough clearance between the blade and the sawmill and then reload them to saw the other way.
My experience has been when sawing 12 or more battens per pass the off bearers just don't keep up.
GAB 
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Offline Walnut Beast

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Re: Sawing Multiple Boards Between Offloading
« Reply #23 on: November 16, 2020, 11:25:11 AM »
This is where the skid steer is at a disadvantage (unless you have a JCB or Volvo unit with single boom) compared to a tractor, telahandler, and wheel loader. If you need to have the loader half way up to get in and out to adjust things or whatever.

Offline alan gage

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Re: Sawing Multiple Boards Between Offloading
« Reply #24 on: November 16, 2020, 12:07:33 PM »
This is where the skid steer is at a disadvantage (unless you have a JCB or Volvo unit with single boom) compared to a tractor, telahandler, and wheel loader. If you need to have the loader half way up to get in and out to adjust things or whatever.
Yeah, that really messed me up when I first got my skidloader. I just took the door off so I can climb out and over the loader.
Alan
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Offline alan gage

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Re: Sawing Multiple Boards Between Offloading
« Reply #25 on: November 16, 2020, 12:22:13 PM »
Is it ever a problem as the blade exits the log? I've noticed at times when sawing heavy slabs that as the teeth exit the cut the slab is then able to pinch the portion of the blade remaining in the cut. It's never been a problem for me but there have been times I've noticed it putting a sudden strain on the engine. Seems with more weight it could be a potential issue but, I guess from what I'm reading here, that it's not.

Alan
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