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Thread: Legs using 45 deg cuts

  1. #1
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    Legs using 45 deg cuts

    Here is a picture of a test I did, the test pieces are only about 6 inches long, where the real leg will be much longer.

    As you can see there are some gaps along the 45's at the inside. I do believe this is from me not holding the piece tight enough against the fence.

    Anyway the outsdie corners look fine and when I measured the diagonals they were spot on. Also the real legs will have splines in the 45's as well. Even with the mess up and since the inside will be hidden once done, do you think this would be okay if it happens on the larger legs. The other legs are going to be 2 1/4" square when put together, and 49" tall.

    Just so you know, I checked everything on my table saw before I did this test in preperation for starting this project. Made sure the blade & miter slot were good with my dial indicator, same thing with the fence. I really think its because I didn't keep enough pressure against the fence, but this is my first time doing cuts like this.


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  2. #2
    Don Taylor is offline Former Member (by the member's request)
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    Good show Aaron!
    The DowelMax would do a great job with that.

    DT

  3. #3
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    Aaron, check the saw blade alignment with the dail indicator after it is set at a 45 degree if you haven't. Some saws will be right on at 90 and will be off at 45. You have to shim eather the frount or back of the trunion and table on contractors saw and between the cabinet and table on a cabinet saw. Just a thought.
    Bob

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    'I THINK" it is because your angle is slightly off. It's really hard to get a perfect 45. Looking at the picture, since 3 sides mate up really well, that tells me that the last piece is not at the same angle(s). If they were all 45 it would have to mate up perfectly.

    Now, if the outsides look good and your happy. Thats all that matters! No one is going to see the insides.
    God grant me the senility to forget the people I never liked anyway,
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  5. #5
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    Quote Originally Posted by Robert E Lee View Post
    Aaron, check the saw blade alignment with the dail indicator after it is set at a 45 degree if you haven't. Some saws will be right on at 90 and will be off at 45. You have to shim eather the frount or back of the trunion and table on contractors saw and between the cabinet and table on a cabinet saw. Just a thought.
    Bob
    I did not do that, I only checked it at 90, so I may have do that.

    Quote Originally Posted by Jeff Horton View Post
    'I THINK" it is because your angle is slightly off. It's really hard to get a perfect 45. Looking at the picture, since 3 sides mate up really well, that tells me that the last piece is not at the same angle(s). If they were all 45 it would have to mate up perfectly.

    Now, if the outsides look good and your happy. Thats all that matters! No one is going to see the insides.

    Since I didn't move the blade between cuts, I think it was me not holding it against the fence well enough, and it drifted away from the fence and in doing so took more off. Need to find a better technique, its the first time I had done an angle cut that large so I was a little nervous.

    Quote Originally Posted by Don Taylor View Post
    Good show Aaron!
    The DowelMax would do a great job with that.

    DT
    Don, do you mean the dowel max could be used for alignment purposes instead of the splines? Might be easier to drill holes than to cut splines on the 45's.
    Rise above the rest

  6. #6
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    Quote Originally Posted by Aaron Beaver View Post
    Since I didn't move the blade between cuts, I think it was me not holding it against the fence well enough, and it drifted away from the fence and in doing so took more off.
    Easy enough to find out. Run another test. Cheaper than scraping good wood.

    I still think the angle is off. When I did this. I had to make several test to get mine to line up right. Either way, cut some more till your sure. I learned that one the hard way.
    God grant me the senility to forget the people I never liked anyway,
    the good fortune to run into the ones I do,
    and the eyesight to tell the difference.


    Kudzu Craft Lightweight Skin on frame Kayaks.
    Custom built boats and Kits

  7. #7
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    Quote Originally Posted by Jeff Horton View Post
    'I THINK" it is because your angle is slightly off. It's really hard to get a perfect 45. Looking at the picture, since 3 sides mate up really well, that tells me that the last piece is not at the same angle(s). If they were all 45 it would have to mate up perfectly.
    I've got to agree with Jeff, with one qualification... if all the angles are cut at say, 44.5 degrees, you'll still see the same result you've got there, three tight fits and one gap. The tight joints will be slightly less than 90 degrees, and you'll only notice the error on the last one.

  8. #8
    Don Taylor is offline Former Member (by the member's request)
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    Quote Originally Posted by Aaron Beaver View Post
    Don, do you mean the dowel max could be used for alignment purposes instead of the splines? Might be easier to drill holes than to cut splines on the 45's.
    That's right Aaron it should work fine. Here is the link for "How To's"

    http://www.dowelmax.com/versatile_angle_joints.htm



    As a suggestion, drill your holes before you cut the angles.
    It's amazing what that thing will do.

    DT

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    Quote Originally Posted by Aaron Beaver View Post
    ...Since I didn't move the blade between cuts, I think it was me not holding it against the fence well enough, and it drifted away from the fence and in doing so took more off. Need to find a better technique, its the first time I had done an angle cut that large so I was a little nervous...
    If this had been the case, then the piece that is off would have a consistent gap -- not just on the inside as yours does. I agree with Jeff and John...you're not quite at 45 degrees.

    I use my old plastic drafting triangle from high school to set my saw blade at exactly 45 degrees. And I make sure I'm measuring on the body of the blade, not on the teeth. Dunno if you ever saw any of the quilt pattern cutting boards I did, but they had to be exact.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
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  10. #10
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    I'll agree also that the angle is probably slightly off, and I would also bet that Robert may have nailed the reason for the angle being off. That is a notorious problem inherent on most brands/models of contractor saws, and most people are not aware of that check, OR the proper steps to correct the problem.

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