Bandsaw blade question.......

Discussion in 'Woodturning Discussion Forum' started by odie, Dec 10, 2012.

  1. odie

    odie

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    Wayne and Bill.......

    No, heck no! I don't mind at all......I see this the same as you both do. I'm enjoying the added input, as it relates to turning.......:D

    ooc
     
  2. Edward Weber

    Edward Weber

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    Odie, can you post a picture of the "Goncalo Alves" blank that started all of this. I'm curious to see if someone can identify it differently, or if it's just one of "those" pieces. Thanks
     
  3. odie

    odie

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    Hi Ed........

    I can do that........maybe tonight or tomorrow. At this point, I think it was Goncalo Alves, as it looks similar to a few other recently done pieces, but not as tight grained as I've done about 5-6 years ago.......

    There is an update to the story now. Yesterday, I was cutting the corners off a Bocote 8x2 blank and the Timberwolf blade was catching badly......just as with the 6x2 Goncalo Alves blank. I immediately exchanged the 3/8" Timberwolf blade with the newly purchased Carbide.com 1/2" alternate set blade......and, the catching resumed. I managed to get the Bocote blank cut round, but it was a struggle. Tried reversing direction of cut, thinking the angle of the grain might be the cause.....no change. I also tried cutting in a straight line, not curved.....still, no change. The new blade was set up correctly, and properly tensioned, as prescribed.

    The similarities of the two bowl blanks are "hard and dense". I'll have to check, but I believe both were in the 22-24 percent MC range.

    I have cut only one bowl blank since the Bocote, but this was a very soft Redwood burl. With prolonged trouble-free use, I'll have more input to evaluate, but the Redwood burl cut very nicely. The piece of Redwood burl was 6x3 1/4".

    ooc
     
  4. Bill Boehme

    Bill Boehme Administrator Staff Member

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    Don't you just hate it when things like that rear their ugly heads just when you think that the problem has finally been solved?

    I am not sure that I have a good mental picture of what is going on when you say that it is catching. Is the blade stopping ... as in the saw is stil running while the blade stops? I'll go with you knowing how to set up the bandsaw, but I thought that I might come up with some additional thoughts about what could possibly be going on. I had a thought that the belt might be slipping if it is old.

    Oh well, this is just another challenge to keep your mind busy. Have a Merry Christmas and think about this later.
     
  5. odie

    odie

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    Yeah, I sure do hate it, Bill........

    The blade has stopped (with the motor still running), but mostly it "pops", or seems "grabby". That's about the best I can explain it. I haven't noticed the blade slowing down any, as you would think would happen with a slipping belt, but checking on the belt is something I have not done......thanks for the suggestion. I'll check on it tomorrow. Possibly a belt tension adjustment is in order, or belt dressing, or replacement.......I don't think the belt has ever been changed, and I've had this 16" band saw for close to 25 years.

    The photo on the left is of the two problem bowl blanks.......Goncalo Alves on the left and the Bocote blank is on the right. The Goncalo Alves blank was 26 percent MC, and the Bocote was 22 percent MC. I'm also including a few pictures of Goncalo Alves bowls I've done in the past. I think it really is Goncalo Alves, and the whole mistaken identification thing is a matter of my memory not being as reliable as I had thought.......can I claim old age yet? :eek:

    Anyway, thanks for turning my attention towards the band saw drive belt......it's now a priority for me to look into it.

    ooc
     

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    Last edited: Dec 25, 2012
  6. odie

    odie

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    Update......

    The band saw drive belts looked pretty good, despite the age. There are two belts with an idler/step pulley. One was a bit looser than I'd like to see, but not real loose. Tension on both were reset, and Permatex belt dressing applied.

    This could have conceivably been the source of the problem, but time will tell. I cut the corners on an 8x3 Myrtle bowl blank to test it. It's harder than the Redwood burl, but not as hard and dense as the Bocote.....no problem with cutting the Myrtle.

    Thanks to Bill for giving me a little needed inspiration to do a belt adjustment and maintenance on the band saw drive belts. :D

    ooc

    BTW: As is my usual procedure when rounding bowl blocks, I test the bottom surface on a known flat surface, such as the table saw top. If it doesn't set flat, it goes to the 6x48 belt sander and trued up before going to the band saw.......
     
    Last edited: Dec 25, 2012
  7. robo hippy

    robo hippy

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    I was having belt slipping problems. Couldn't figure it out. Eventually did. A friend had used the bandsaw. He reset the 'squareness' of the table to the blade, and instead of using the table leveling bolt, he removed it, and used the belt tensioning bolt to raise the bed a bit, which added slack to the motor drive belt. Problem solved.

    robo hippy
     
  8. Bill Boehme

    Bill Boehme Administrator Staff Member

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    It's like getting in the shortest line at the store. Things aren't always what they seem to be.
     
  9. KellyDunn

    KellyDunn

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    Well, lots of guesses that make sense. The sulfer here is in the active vents of the volcano. A long ways from me. Where the magma cooled in large areas slowly we have an extremely hard blue rock. But most of the lava flows can allow roots to break them apart easy. And over many thousands of years roots slowly create a soil layer. I live on the oldest part of the Big Island. So lots of soil. But not deep soil. And not all trees suck up stuff. So perhaps a mystery. I think I will ask on another forum and see what kind of feedback I get. Interesting thread. Merry Christmas to all.
     
  10. Bill Boehme

    Bill Boehme Administrator Staff Member

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    Back to the bandsaw for one more comment -- I have had a tire get completely loose on an old bandsaw that was about ten year old at the time. The rubber had lost all of it's "stretch" and was as loose as a noodle. The belt was also sort of hard in the sense that it was not really cushioning the teeth of the blade. That can cause a blade to have more set on one side than the other and not cut straight. I can't remember if the loose tire on the drive wheel caused the band to slip, but I can see where it could if I had tried to cut some especially hard dense wood that was also thick.

    We had a very unusual occurrence here yesterday -- snow -- real snow -- on Christmas day even. We lost our cable TV and Internet service so we had to speculate about what people did before staring at a glowing screen for hours on end -- and I couldn't Google the answer (now that Google has become a verb). The answers we came up with including eating, cooking, talking, and opening a gift to ourselves -- a TV, which obviously we could not watch. :D
     
  11. odie

    odie

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    As long as we're veering from the subject again........thought I'd register my input on this........

    Don't remember the exact day, but it's now been about 5-7 years since I watched any TV at all......zip, zero, nada! Because of this one thing, my productivity has doubled, or tripled in the past few years.

    So, you wonder what people did.......back then? They did whatever was in their hearts, because their minds weren't being overloaded with more information they could possibly process.

    I do participate in several internet forums with a single theme. I don't participate on multiple forums with the same theme. I do this purposefully, because I understand that I must limit the time I invest with computers. That is why I do not bother with the other woodturning forums.......I just don't want to consume my time with these things. If the information is worthwhile, I will see it here.......maybe on a different timeline, but it will get here eventually. For me, woodturning is a major focus in my life, but these days woodturning is like a part-time job, and I am working full time.......and, I have a family. It's difficult to cover all the bases, but eliminating TV from my life is one of the best things I've ever done in the pursuit of self-fulfillment.

    :cool2:

    ooc
     
  12. Bill Boehme

    Bill Boehme Administrator Staff Member

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    You have my admiration for your decision. I might do the same, but have been out voted in our household.

    I was secretly enjoying the quietness (please don't rat me out) and the opportunity for doing other things.
     
  13. John Lawson

    John Lawson

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    I did do the same when I was single. Didn't watch TV for years in the 70's and 80's. But my darling wife cannot be in the house without the TV on. I used to read 2-5 books per week. Now I'm lucky to get that much reading done in a year. DVR's are a boon because you can watch 4 shows in 3 hours.
     
  14. Bill Boehme

    Bill Boehme Administrator Staff Member

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    My wife and your wife must be twin sisters. :D
     
  15. john lucas

    john lucas

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    I watch TV simply because by the time evening gets here I'm tired from working all day. I need a little diversion and the right shows sort of take me away from it all for a little while.
    I am thinking of dropping Dish. It's just too expensive. I'm going to put up an antenna and can hopefully pick up the Nashville stations 80 miles away. That will fill my news void. Then I purchased a Roku unit so I can watch movies. I plan to ride the bike trainer while watching to get some serious exercise in.
     
  16. odie

    odie

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    John.......may I suggest some radio in your shop. You won't miss out on any of the current news coverage. I'm thinking about adding some satellite radio to my shop......but, haven't done that yet. I use satellite radio in the home, and transfer it to the car for trips.....pretty good programming, no matter what you fancy!......Even have old radio programming like Whistler, Green Hornet, etc.......great for long trips!

    I also dumped Dish Network.......still have tv and a vcr for vhs/dvd movies. My son and I have make regular trips to the local movie rental place on Tuesdays, when they run weekly specials on all movies in the place (including new releases) for 99 cents.

    Since there is no tv programming here, computer use has gone up for everyone......as expected. I have to limit myself, but place no limits on anyone else.

    Wife never did watch much tv, but the two boys converted much easier than I ever expected.........no complaints from anyone, but there was some resistance when the tv first was eliminated from this home.......(older boy now graduated from hs, and is off on his own now, but still have one 13yr old boy at home.)

    ooc
     
    Last edited: Dec 28, 2012
  17. john lucas

    john lucas

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    Odie I have satelite radio in the shop. The local radio stations suck. I don't listen to talk radio or news when in the shop. It's too distracting. I couldn't do without my oldies. I sing along with Frank Sinatra, Neil Diamond, Tom Jones, John Denver and all the fun ones.
     
  18. odie

    odie

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    Whatever works for you, John........

    I hear you, re: distracting. You are correct. There are times when I turn off the radio, so that I can concentrate better. When the lathe is running, or any of the other machinery, for that matter......I can't hear it, anyway. It's easy to concentrate at the lathe, because there is nothing to interfere with your train of thought.

    When you said you sat down to the tv because you were tired from work, it reminded me of my old routine. It was just too easy to stay in the easy chair longer than I ever intended. Over and over and over again, the same thing happens.........and that is..... nothing important in my life got done at the rate I could be satisfied with.

    For me, it's easy to have 20/20 hindsight and see how the tv effected my personal life negatively.

    ooc
     
  19. Gretch Flo

    Gretch Flo

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    tv

    I never watched tv much-my husband (now ex) was in control of that. Watched all sorts of sports -you know like curling, bowling tiddly winks(during the week end days) and I thought it was counter productive as I was doing all the work around the house. Actually turned me off on sports. I have had season Mich st university football tickets that I worked my way thru the years to the 50 yd line-Used to love them. Got turned off. Now Just sell them to friends of mine.
    But then 2 years ago I for a 42" tv and what a difference. I am with John on this, I turn til 8 pm for the last 6 months when I am not doing real work that pays the bills, and like certain programs that may have 3 show in a row, and I don't mind the reruns. (Criminal minds, castle, Law and order -special victims are my favs ). Large screen allow me to work on the computer and see the screen from across the room.
    I can vegetate then, after being busy for 12-13 hours. Gretch
     
  20. Laurence Giglio

    Laurence Giglio

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    Back to bandsaw blades

    First, on the TV side of things, I am a music person, my wife is a visual one. She stays in the house watching the telly and I am out in the garage with the CDs blaring. I am an old time rocker with some opera tossed in for surprise.

    BUT

    I have an underpowered 1/2 maybe a 3/4 hp 14 inch delta BS with riser. I go through those green wood BS blades quickly, so I started about a year ago to sharpening them myself. I can generally sharpen them 2 times before they are toast andI have to hang a new one. (I use a Dremel with the flat side of a cutoff disk just glancing off the top of each tooth while it is still on the BS method)

    But, the real problem is the set. When they loose their set, they bind, and heat, then ruint blade. I have searched high an low on finding a way to reset the blades but to no avail.
    So the question here is, How many here sharpen their own blades?
    Do you gave a way to reset them?

    I was thinking of taking a flat piece of steel, like the backside of a railroad tie plate, grinding a dimple roughly the shape of a tooth in it and using a hand held nail set whacking every other tooth one time, flipping the blade over and doing the adjacent side likewise. But the blade will bounce and no set will be achived, so I nixed that idea. I know, they are less than 20 bucks, but at 5 per year thats a bowl gouge. I just got a PM 3520, I have to save somewhere!
     

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