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Author Topic: New LT15 blade rising during cut?  (Read 2463 times)

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Offline Leigh Family Farm

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New LT15 blade rising during cut?
« on: August 22, 2018, 05:05:50 PM »
A co-worker of mine just bought a brand new LT15 and sawed their very first log over the weekend. As he explained it to me, the saw blade rose about 1/8 - 1/4" during the cut. As the blade left the log, it would drop back down to the original cut depth but the saw head never moved. He had the blade tension to specifications (in the green) and he tried with more tension (orange/red). Still had the same problem. Any ideas as to the cause of the problem? 

The log was a 18-20" 5 ft. ash that was freshly cut down the weeks prior. 
There are no problems; only solutions we haven't found yet.

Offline WDH

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Re: New LT15 blade rising during cut?
« Reply #1 on: August 22, 2018, 08:06:41 PM »
Sounds like the blade is dull, maybe from hitting something in the log like rocks in the bark, dirt, or metal.  Try a new blade and see how that cuts. 
Woodmizer LT40HDD35, John Deere 2155, Kubota M5640SU, Nyle L53 Dehumidification Kiln, and a passion for all things with leafs, twigs, and bark.  hamsleyhardwood.com

Offline bandmiller2

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Re: New LT15 blade rising during cut?
« Reply #2 on: August 22, 2018, 09:07:27 PM »
Sounds like the band is riding too far back on the belted wheels and its pressing the set out on the inside teeth. Frank C. 
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Offline Brad_bb

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Re: New LT15 blade rising during cut?
« Reply #3 on: August 22, 2018, 09:31:33 PM »
Possibilities:
Dull band or incorrect set (rare)
Feeding too fast.  Feed so that the RPM's of the engine don't drop significantly
Band tension setting not correct.  See Manual for correct setting.
Drive belt tension.  Get the tension checking tool from Woodmizer and follow the procedure with the tool.  It's not hard, you need to do this every 50 hours on the mill anyway.

On a side note, install and hour meter on your mill.  I think it's ridiculous that Woodmizer specs all the maintenance in hours yet do not have an hour meter on the mill!  They are pretty simple to install.  If you have the 18hp Kohler gas engine, there may be a yellow wire with female spade terminal that you can plug the +side of the hour meter into.  My 2014 has this and it's very convenient ignition on power. You will have to make a bracket to mount the hour meter.  I bought one on ebay. 


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Offline firefighter ontheside

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Re: New LT15 blade rising during cut?
« Reply #4 on: August 22, 2018, 09:39:59 PM »
Is the blade set parallel to the bed?  
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Offline Lawg Dawg

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Re: New LT15 blade rising during cut?
« Reply #5 on: August 22, 2018, 10:05:58 PM »
Probably dull blade, check that first
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Offline Slingshot

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Re: New LT15 blade rising during cut?
« Reply #6 on: August 22, 2018, 11:55:13 PM »
Biggest (and maybe the only) problem is probably the ash log. They are good for that.

Offline Banjo picker

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Re: New LT15 blade rising during cut?
« Reply #7 on: August 23, 2018, 06:33:55 AM »
With out being there to see whats going on, I'll throw my lot in with Slingshot.  Not too long after I got my mill an ash log showed up to be cut.  It just would not turn out a usable product.  I finally took it off the mill and put it out by the fence and it layed there till it rotted.  Only log I ever gave up on. Banjo
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Offline WDH

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Re: New LT15 blade rising during cut?
« Reply #8 on: August 23, 2018, 07:22:25 AM »
I have done that with hickory.  Just could not saw it flat no matter what. 
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Offline ljmathias

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Re: New LT15 blade rising during cut?
« Reply #9 on: August 23, 2018, 08:48:14 AM »
Yeah, good old Southern hickory. One just died on the property for no apparent reason (God knows but I sure don't) so it behooves me to cut it down and do something with it. Too hard to split for firewood so I guess I'll try quarter sawing it. Should be fascinating seeing how it twists and turns. Or maybe I'll let it dry for a while (like maybe a couple of years) so it's all locked in place and then cut it... after it's turned hard as nails and dulls the blade after the first few inches. Yeah, good old hickory, put here by the Lord to teach us patience and appreciation of what we can't change.

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Offline sawmilljoe

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Re: New LT15 blade rising during cut?
« Reply #10 on: August 23, 2018, 08:46:34 PM »
I had for yesterday that when I made the last cut to square it up it bowed 6 inches and made a 1/8 twist. First time I gave up on a log. Some just canít be sawed

Joe

Offline dgdrls

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Re: New LT15 blade rising during cut?
« Reply #11 on: August 23, 2018, 09:08:56 PM »
what are the specs on the band?
hook angle, set, tooth spacing??

could be the log, but fresh cut it should saw better than that.

D

Offline ladylake

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Re: New LT15 blade rising during cut?
« Reply #12 on: August 24, 2018, 04:49:21 AM »
what are the specs on the band?
hook angle, set, tooth spacing??

could be the log, but fresh cut it should saw better than that.

D
 
 Also what brand, I've run across a couple that wouldn't even cut basswood straight.  Steve
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Offline Leigh Family Farm

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Re: New LT15 blade rising during cut?
« Reply #13 on: August 29, 2018, 01:11:30 PM »
Sorry for the delay. Been a busy week. 

Brand new blade that came with the brand new mill. I think Vortex or something. My friend mentioned its the general blade that the dealer gave him when he bought it. 

I will pass on the characteristics of ash/hickory and the blade positioning on the wheels. He hsould be going back up to VT this weekend as thats where the saw is. I will update next week.  
There are no problems; only solutions we haven't found yet.

Offline Stephen1

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Re: New LT15 blade rising during cut?
« Reply #14 on: August 29, 2018, 02:02:00 PM »
I have to use a 9 degree blade for ash or sugar maple. I would use a 4degree, but WM tells ne the 24 onan does not have the power to pull that blade.
Most ash that I am sawing  is dead and dry and makes it worse. I bet that not only did the blade drop after leaving the log but that there was waves in the board and cant left on the mill.
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Offline SawyerTed

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Re: New LT15 blade rising during cut?
« Reply #15 on: August 29, 2018, 04:35:08 PM »
Stephen, I have 25 hp Kohler on my mill.  I've used 4 degree and 7 degree turbo blades with very good results. The only blades I used for about the first 15 thousand board feet I sawed were 4 degree.  I started trying the Turbo 7s a few weeks ago, I'm switching to them as I replace blades.

It's just a WAG but the blade rising and diving in the cut makes me suspect cutting speed is the culprit.  Too fast and waves and diving/rising start.  Same for a dull blade.  Put the two together and poor cuts are inevitable. 
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Offline Peter Drouin

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Re: New LT15 blade rising during cut?
« Reply #16 on: August 29, 2018, 08:44:52 PM »
Cutting to slow will dull the blade in one cut too.
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Offline Jeff

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Re: New LT15 blade rising during cut?
« Reply #17 on: August 29, 2018, 09:23:32 PM »
Dull band or incorrect set (rare)
 

Rare?
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Offline Peter Drouin

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Re: New LT15 blade rising during cut?
« Reply #18 on: August 29, 2018, 09:45:15 PM »
Over the years I have gotten boxes of new blades that I had to set and sharpen before I could use them.
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Re: New LT15 blade rising during cut?
« Reply #19 on: August 29, 2018, 10:16:52 PM »
Rare that the set is incorrect out of the box.  Has been rare for me.
Anything someone can design, I can sure figure out how to fix!
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