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Author Topic: WM-LT40HD Wavey cuts?  (Read 1120 times)

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Offline Peder McElroy

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WM-LT40HD Wavey cuts?
« on: January 07, 2012, 11:02:23 pm »
I'am new to the bandsawing world. I have a 1991 LT40 hd with a onan 24 . Tha last few days I have noticed my cut's to be kinda wavey, it's still cutting stright but the finish is wavey. I tried to speed up the feed and the band is @ about 2000lbs. I'am cutting softwood (redwood) could it be a dull blade?
Any help would be great. Photos below. 
Thanks
Peder
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Offline pineywoods

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Re: WM-LT40HD Wavey cuts?
« Reply #1 on: January 07, 2012, 11:10:07 pm »
Most likely the blade. Needs to be sharp sharp. Redwood is kinda soft, requires lots of set. I run 25 -30 thou set sawing syp and cypress..Using re-sharp or doing your own? Don't go tweaking on the mill until you are shure it's not the blade..I just about wore out the adjustments on my mill before I learned the hard way what real sharp is...
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1995 Wood Mizer LT 40, Liquid cooled kawasaki,homebuilt hydraulics. Homebuilt solar dry kiln.  Woodmaster 718 planner, Kubota M4700 with homemade forks and winch, stihl  012, 028, 029, Ms390

Offline kderby

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Re: WM-LT40HD Wavey cuts?
« Reply #2 on: January 07, 2012, 11:57:20 pm »
I agree on the blade.  Isn't redwood high in silica (abrasive)?  Changing to sharp blades and trying some narrower cuts would be my first two diagnostic choices. 

I milled some large spruce (soft) logs and they were like trying to dice whipped cream.  I increased the blade tension and that seemed to help.  A sharp blade was the certain cure.

The redwood material is pretty rare/fancy.  Not many of us have ever milled it.  Hopefully a voice with some experience will show up with a comment.   You might get a few more answers by adding more specifics to the title and the question.

Kderby
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Offline LeeB

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Re: WM-LT40HD Wavey cuts?
« Reply #3 on: January 08, 2012, 12:29:42 am »
Quote from: Peder McElroy on January 07, 2012, 11:02:23 pm
I'am new to the bandsawing world. I have a 1991 LT40 hd with a onan 24 . Tha last few days I have noticed my cut's to be kinda wavey, it's still cutting stright but the finish is wavey. I tried to speed up the feed and the band is @ about 2000lbs. I'am cutting softwood (redwood) could it be a dull blade?
Any help would be great.
Thanks
Peder

 I agree blade but I need to know your deffinition of cutting straigh but the finish is wavy. Sounds to me like you are describing a tooth or two out of set and leaving saw marks. I cant picture straight and wavy together. ???
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Offline Chuck White

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Re: WM-LT40HD Wavey cuts?
« Reply #4 on: January 08, 2012, 09:27:31 am »
Lee, could be the boards are good, then comes the edging, and the edging itself is wavy!  :-\

Only thing I can think of!
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CHUCK - Retired USAF and now a Mobile Sawyer
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Basic mechanical skills are all that's required to maintain the Wood-Mizer.
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Offline customdave

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Re: WM-LT40HD Wavey cuts?
« Reply #5 on: January 08, 2012, 09:52:30 am »
I have experienced this as well, dull blade and feed speed to fast , next cut I will slow feed down fair amount & cut straight as an arrow, time to put sharp blade on. This is sawing spruce & poplar, I have no experience with redwood, but I would sure like too ;)....

                                              Dave
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Offline Peder McElroy

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Re: WM-LT40HD Wavey cuts?
« Reply #6 on: January 08, 2012, 02:58:10 pm »
  photos of the wavey redwood.

  

  f wavey cuts
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Offline pineywoods

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Re: WM-LT40HD Wavey cuts?
« Reply #7 on: January 08, 2012, 03:09:21 pm »
Yup, it's the blade. probably a tooth missing or bent badly. Try a new blade. That's the kind of results I get after I saw a nail or 2 and keep on sawing.
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1995 Wood Mizer LT 40, Liquid cooled kawasaki,homebuilt hydraulics. Homebuilt solar dry kiln.  Woodmaster 718 planner, Kubota M4700 with homemade forks and winch, stihl  012, 028, 029, Ms390

Offline POSTONLT40HD

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Re: WM-LT40HD Wavey cuts?
« Reply #8 on: January 08, 2012, 03:41:58 pm »
I've been through this also......it's the blade.
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David

Offline Chuck White

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Re: WM-LT40HD Wavey cuts?
« Reply #9 on: January 08, 2012, 03:46:49 pm »
Definately a couple of teeth way out of set, must have hit a nail, stone, etc.
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CHUCK - Retired USAF and now a Mobile Sawyer
1995 Wood-Mizer LT40HDG24 (Onan)
Shingle & Lap-Sider - Cooks Cat Claw Sharpener & Single Tooth Setter
Basic mechanical skills are all that's required to maintain the Wood-Mizer.
4 ft Logrite cant hook and a few unknown brands.
I LOVE MY SAWMILL

Offline Magicman

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Re: WM-LT40HD Wavey cuts?
« Reply #10 on: January 08, 2012, 04:29:00 pm »
That is why pictures are so important.  Word descriptions can vary and have many different interpretations.  Pictures are the universal language.
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'98 Wood-Mizer LT40SuperHydraulic/Lombardini

There is much that I need to do, more that I want to do, and less that I can do.

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

Offline MotorSeven

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Re: WM-LT40HD Wavey cuts?
« Reply #11 on: January 08, 2012, 04:41:52 pm »
Peder, have you been using the same blade for a "few days". Depending on how many hrs a day, that might be a little much unless the bark never touched the dirt.
When mine gets dull the sound or pitch it makes changes...like a higher frequency.
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Offline Ianab

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Re: WM-LT40HD Wavey cuts?
« Reply #12 on: January 08, 2012, 05:05:18 pm »
Like the guys are saying, you have some teeth on the band damaged. Blunt or lost their set. It may not even be visible to the naked eye.

Each time the band goes around it gets to those damaged teeth and wanders a bit. This is why the pattern is so even, but would vary with the feed speed.

I have a circle mill, so don't see that exact issue, but I've had the exact same thing on my little workshop bandsaw, just on a smaller scale. Yup, damaged band.

Ian
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Offline Peder McElroy

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Re: WM-LT40HD Wavey cuts?
« Reply #13 on: January 08, 2012, 07:49:04 pm »
Thanks to all of you guys for the help.
Peder
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Offline kderby

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Re: WM-LT40HD Wavey cuts?
« Reply #14 on: January 09, 2012, 01:02:33 am »
Thanks for the picture Peder, that is a classic "tooth out of set" photo.  No fix for that in my world.  I just break the blade so it stores flat in the scrap pile.  I had saved some of those blades for trees I suspected had nails.  I thought I might someday mill a root wad (rocks).  I never use the damaged blades.  Now they just go in the trash. 

Go crazy with the camera and post a few more.  Where did you get some redwood?  What will you do with it?

Thanks for the question.  Keep Milling!

Kderby

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Offline Chuck White

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Re: WM-LT40HD Wavey cuts?
« Reply #15 on: January 09, 2012, 05:28:54 am »
Quote from: kderby on January 09, 2012, 01:02:33 am
Thanks for the picture Peder, that is a classic "tooth out of set" photo.  No fix for that in my world.  I just break the blade so it stores flat in the scrap pile.  I had saved some of those blades for trees I suspected had nails.  I thought I might someday mill a root wad (rocks).  I never use the damaged blades.  Now they just go in the trash. 

Go crazy with the camera and post a few more.  Where did you get some redwood?  What will you do with it?

Thanks for the question.  Keep Milling!

Kderby

Just Curious
Why is there "no fix" for that blade, just take the blade off and reset it!
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CHUCK - Retired USAF and now a Mobile Sawyer
1995 Wood-Mizer LT40HDG24 (Onan)
Shingle & Lap-Sider - Cooks Cat Claw Sharpener & Single Tooth Setter
Basic mechanical skills are all that's required to maintain the Wood-Mizer.
4 ft Logrite cant hook and a few unknown brands.
I LOVE MY SAWMILL

Offline LeeB

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Re: WM-LT40HD Wavey cuts?
« Reply #16 on: January 09, 2012, 07:56:33 am »
Got to agree with Chuck on that one, or save it for cutting siding/paneling with a rustic look.
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'98 LT40HDD/Lombardini, Case 580L, Cat D4C, Ford 851 tractor, JD 3032 tractor, Husky 346 and 372XP's. !998 and 2006 3/4 Dodge 5.9 Cummins and a 1966 Chevy C60 w/ dump bed.

Offline Chuck White

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Re: WM-LT40HD Wavey cuts?
« Reply #17 on: January 09, 2012, 08:59:32 am »
When I'm on a saw-job, I have 4 piles!

1. Good lumber pile

2. Free pile (some usable stuff, maybe only 3-4 ft long on a tapered log)

3. Slab pile

4. Sawdust pile  ;D

Those boards that come out with "ziggers" across them go on the free pile when I'm sawing.
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CHUCK - Retired USAF and now a Mobile Sawyer
1995 Wood-Mizer LT40HDG24 (Onan)
Shingle & Lap-Sider - Cooks Cat Claw Sharpener & Single Tooth Setter
Basic mechanical skills are all that's required to maintain the Wood-Mizer.
4 ft Logrite cant hook and a few unknown brands.
I LOVE MY SAWMILL

Offline Magicman

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Re: WM-LT40HD Wavey cuts?
« Reply #18 on: January 09, 2012, 09:12:58 am »
Our "piles" are the same Chuck.   ;D
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'98 Wood-Mizer LT40SuperHydraulic/Lombardini

There is much that I need to do, more that I want to do, and less that I can do.

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

Offline Peder McElroy

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Re: WM-LT40HD Wavey cuts?
« Reply #19 on: January 09, 2012, 11:42:32 am »
Kderby
Almost everything I mill is redwood,I live in a redwood valley and have about 30 acres of redwoods.
Peder
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