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Author Topic: Bandmill with circular blades  (Read 2082 times)

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Offline ammhouse

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Bandmill with circular blades
« on: May 02, 2013, 11:47:56 PM »
Hello, I'm new so forgive me if I'm missing the obvious. Has anyone ever tried mounting vertical circular blades in front of a bandmill to edge the
boards in one pass. I was envisioning one shaft with adjustable hubs...say probably 4 blades with the outer two blades having the adjustment on the outside and the inner two would have hubs adjustable but pre-set before starting. The depth of the vertical cuts would be limited I'm assuming since their would be 2,3 or 4 blades cutting and not practical for deep cuts. Would this work or is the band saw not precise enough for the bottom cut? What about going with a thicker or wider blade for the band mill? I would love to buy a twin circular mill but can't justify the cost since it would only be a hobby. Looking for ways to speed up the process of a band mill.

Offline beenthere

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Re: Bandmill with circular blades
« Reply #1 on: May 03, 2013, 12:12:57 AM »
Welcome to the Forestry Forum.

This idea was kicked around about a year ago, if I remember right (IIRC).  Seems the weight of the saws was a big negative, as the power to operate the saw blades.
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Offline redbeard

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Re: Bandmill with circular blades
« Reply #2 on: May 03, 2013, 01:56:46 AM »
It would be tough to control and handle all the edgings coming off the log. You would spend more time getting them out of way for next cut. Interesting idea but I see a pixie stick pile of edgings. Just thinking and a big Welcome to forum.
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Offline Ianab

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Re: Bandmill with circular blades
« Reply #3 on: May 03, 2013, 02:39:14 AM »
I would think the extra complexity that it would add to the mill stop it being so practical. Means you need another ~20 hp to drive the edger blades? Then the gearbox / drive / edger adjustment mechanism all mounted on the saw carriage.

Easier and cheaper to get a standalone edger?

Ian
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Offline thecfarm

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Re: Bandmill with circular blades
« Reply #4 on: May 03, 2013, 07:44:29 AM »
ammhouse,welcome to the forum.I am a hobby sawyer too. Speed does not go with hobby.   ;D  I have an all manual mill. Can you say SLOW? Can you say ALOT of work? But I don't use it much and I am very happy with it. The more you get on a mill the more you have to maintain things and keep it in line. Sometimes the KISS is best.
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Offline justallan1

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Re: Bandmill with circular blades
« Reply #5 on: May 03, 2013, 08:49:56 AM »
Welcome to the forum. Ammhouse.
I would think that if anything it would slow things down. It would be 3 times as much time for a setup plus the scrap would be a mess.
If all of your logs were pretty much exactly the same it may be different. Just my opinion.
Allan

Online Ron Wenrich

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Re: Bandmill with circular blades
« Reply #6 on: May 03, 2013, 09:36:01 AM »
I've sawn with a vertical edger on a circular mill.  It does what you're talking about.  It takes 2 separate power sources in order to run efficiently. 

But, the biggest problem is in tolerances.  On circle mills, we have a 1/4" tolerance due to saw kerf.  That means that we have a little play on our blade before we start seeing problems.  It also means that you have to be very good on blade maintenance.  A slightly dull blade isn't going to do it.  If a saw starts to drift out of a board, you'll get a line on your next cut.  If it pulls into a log, you're edging strip is going to hang onto the board.  I can't imagine you'll have any better results with a tolerance level that will be 4 times greater. 
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Offline ammhouse

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Re: Bandmill with circular blades
« Reply #7 on: May 03, 2013, 09:39:30 AM »
Thanks Guys...you are a wealth of information.
Reading through the posts can be overwhelming...there is so much experience and knowledge on here.
My Dad planted nearly 40 acres of ponderosa pines which were intended to be sold as Christmas trees from his tree farm...it didn't end up that way..they were planted too close together and he had a forestry guy come out and mark the trees which would need to be culled to let the others grow for lumber. That culling was never done either. I now have 40+ acres of say 10 to 24 inch trees about 25 to 30' high which I'm wondering how to handle...a sawmill seems to be the best option. Hate to see them just pushed down and burned..seems like such a waste.

Online Dave Shepard

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Re: Bandmill with circular blades
« Reply #8 on: May 03, 2013, 09:55:14 AM »
Welcome to the Forum!

Years ago I remember reading in Sawmill and Woodlot about the Western Sawyer sawmill entered in one of the Shootouts that had a twin blade edger running either ahead or behind the band. I've never seen or read anything more about it.
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Offline beenthere

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Re: Bandmill with circular blades
« Reply #9 on: May 03, 2013, 10:17:47 AM »
Quote
have 40+ acres of say 10 to 24 inch trees about 25 to 30' high

Is that diameter or circumference?  We usually talk diameter at breast height (DBH) for trees, so am thinking circumference if only 30' high trees. 

We like pics, if you would post some. Sounds like a good project but some hard work. ;)
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Offline drobertson

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Re: Bandmill with circular blades
« Reply #10 on: May 03, 2013, 10:25:21 AM »
Amme, that would be a waste for sure, if anything try to get them on a deck of some sort off the ground, and in the meanwhile try and find a mill or mill service to saw up the timber,  like you, I just hate to see good timber go into a burn pile, such a waste,  out here some years ago a big cattle company dozed hundreds if not in the thousands of acres to run cattle, burnt nearly all the timber, folks were just shaking their heads at the waste, I still do everytime I drive by the ranch,   good day to you,  david
only have a few chain saws I'm not suppose to use, but will at times, one dog Dolly, pretty good dog, just not sure what for yet,  working on getting the gardening back in order, and kinda thinking on maybe a small bbq bizz,  thinking about it,

Offline dboyt

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Re: Bandmill with circular blades
« Reply #11 on: May 03, 2013, 11:53:27 AM »
Ammhouse, welcome to the forum.  Trees the size you mentioned will square up into cants without much edging required.  Once you get the hang of it, edging with the mill is pretty quick.  If you get into a full production mode, you will want a separate edger, for sure.  You're doing the right thing in salvaging the trees.  Anything made from trees that you father planted are bound to become treasured family heirlooms.  A good manual sawmill should be just the ticket.  I use a Norwood MX34 on our tree farm in Missouri, and it has been an excellent investment.
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Offline leroy in kansas

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Re: Bandmill with circular blades
« Reply #12 on: May 06, 2013, 12:36:30 AM »
This is an interesting idea, however isn't this going to accomplish the same thing as a swing mill is built for? May be trying to reinvent the wheel. Just saying.

Offline Magicman

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Re: Bandmill with circular blades
« Reply #13 on: May 06, 2013, 08:57:12 AM »
Welcome to the Forestry Forum,    ammhouse.   :)
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Offline logloper

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Re: Bandmill with circular blades
« Reply #14 on: May 06, 2013, 08:27:37 PM »
I have also thought along this idea. I have looked for a bandmill "body", but with circle saw blade( or blades) Kind of like a swing mill, but that has all the hydraulic options of a bandmill. Looked at the "TwinCut" mill, but something a bit smaller would be nice.

Offline shenandoahsawmill

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Re: Bandmill with circular blades
« Reply #15 on: May 07, 2013, 06:31:18 PM »
 

 

I own a Povlsen model 36 double cut horizontal wide band with circular saw edger and 42" throat. Mid 90s machine. The edger moves up out of the way and down to the band saw (When needed) with a hyd cyl. One circular blade is fixed and one is adjustable for board width. You could put multiple blades on the edger. I don't use the edger now as I am not into dimensioned lumber just flitch sawing and quarter sawing. The edger gets in the way when trying to get to the middle of  a big white oak log.    Gary

Offline Satamax

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