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Thread: Drifting Away........

  1. #1
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    Drifting Away........

    You know my resaw bandsaw, Big Blue, the one with the 2 1/4" W-I-D-E blade................????

    Well would you believe that even with a blade THAT wide, I still have to set the "Drift" on it.........?

    Well I do.............

    Attachment 3057
    Brand new blade, out of the box, and this is the drift, compared to the old blade that is going out for sharpening.......


    Attachment 3058
    Not a ton, but WAY to much to slice nice thin veneer.

    Attachment 3059
    A slight adjustment, and all is good!

    Yep, even Big Blue drifts a bit

    Cheers!
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  2. #2
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    Grand Junction, CO
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    You'd have to adjust for drift ESPECIALLY with a blade that wide. Your set angle is probably less than one degree, right? So the blade won't crab at all. It might be easier, long term, to; 1, align the wheels parallel to the frame and 2, align the wheels to each other (co-planar) and then 3, square the table to the frame. Any fine adjustments from there could be accomplished by squaring the guide blocks , if you use them.

  3. #3
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    hi bill! what`s goin` on with your reground blade? i`m curious as to how that`s working out......i`ve been sawing some 16" mahogany 14ft long and wishing for a better way ......tod
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  4. #4
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    Wake Forest, NC
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    OK, I am confused. I thought if you had the teeth overhanging the wheels you really didn't have to worry about drift.

    You have to adjust for drift regardless of blade size?

    How do you cross cut if this is the case?

  5. #5
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    Grand Junction, CO
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    Hi Tod, I'm not talking re-grinding, I'm re-setting for more set angle. But yes, it's coming along. My machinist is still working on the prototype for the re-setter and in the meanwhile I'm still building a replacement for the resaw I was using. (I hate selling these saws because every time I do , I have to build another one before I can experiment again.) It'll probably be a month or more before I get the re-setter working but I still plan to shoot the "resaw sans guide rollers" video soon as I finish this saw. I'll hand set this one with a hammer and punch. I'm wondering if anybody out there has yet taken a minute to calculate the set angle of the blades they're using, and tried to relate them to the results they're getting with their saws. It wouldn't appear they are so far,-but I'm determined to prove my point and inspire the manufacturers to get us some better blades in a wider range of choices. There's a lot of band saw capacity going to waste out there and I mean to fix that. One way or another.

  6. #6
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    travis, the teeth overhanging the wheel will have no effect on drift....drift occurs from uneven tooth load if one side is set .0000000004 greater than the other it`ll cause the blade to pull or drift somewhat to that side...of course there are other factors involved here too but most blade drift is due to minute differences in the tooth protrusion.
    bill, i knew that you where planning to regrind the gullets to get more set ..i was just wonderin` how far you`d gotten..tod
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  7. #7
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    Hey Tod, Not very-I'm still building the saw. If you have a "suicide area" on this forum I might post a picture of the tool I use to grind gullets free-hand.

  8. #8
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    Quote Originally Posted by William H. Falberg View Post
    Hey Tod, Not very-I'm still building the saw. If you have a "suicide area" on this forum I might post a picture of the tool I use to grind gullets free-hand.
    no suicide area bill ......just post it in general woodworkin`.....part of sharpening afterall.....is it similar to my ol` foley set-up?
    stu, sorry for hijackin` your drifter thread
    tod
    [SIZE="1"] associated with several importers and manufacturers.[/SIZE]

  9. #9
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    Travis: fear not-we're still on your quesion but side-tracking. I'm going to challenge Tod's assertion that drift is caused *primarily* by uneven tooth set. I believe drift is caused by a blade's inability to crab in response to deflectional forces beyond earthlings' understanding or control. If Tod is correct I can up-set only one side of a blade that already cuts flat and cause it to drift consistently to one side. If I'm right the blade will continue to cut flat, but with a slightly wider kerf and a rougher finish. A dull blade just cuts slower, heats more, and tends to bow in either or both directions. (Bearing in mind that you can over-feed the best of blades.) I'm busy with the "guideless rip" movie project right now now so Tod will have to try the one-sided re-set trick for himself til I get the time. I'll cut that as a movie, too, if anyone's interested. It would be a cool movie to show on my website.

  10. #10
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    BTW: What does your foley look like? PIC?

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