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Big Gap In Mitre Corner?

Discussion in 'Wood / Woodwork / Carpentry' started by Foresty Forest, 25 Aug 2021.

  1. Foresty Forest

    Foresty Forest

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    Why do I keep getting a big gap on one corner of my picture frames?
    I'm using an electric mitre saw and a band clamp for joining.

    [​IMG]
     
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  3. Tigercubrider

    Tigercubrider

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    Your saw (or you ) is not accurate
     
  4. JobAndKnock

    JobAndKnock

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    Agreed! But having said that it is pretty darned close. I think I'd consider adjusting that joint with a block plane or a sanding board
     
    Last edited: 26 Aug 2021
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  5. ^woody^

    ^woody^

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    Is this mitre saw one of the big ones meant for first fix rough cuts? :cautious: There is a bit of wobble in the blade.
     
  6. conny

    conny

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    Try a (accurate) set square on the inside and outside of the joint to see if you can determine which edge is running out. It may be that you are 1/2 to 1 degree out on the 45 degree mark of your saw, giving you the divergence. Maybe using a very thin shim to offset the wood before cutting may solve this problem.
     
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  8. ^woody^

    ^woody^

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    The whole cut line looks uneven, not a wrong angle.
     
  9. Notch7

    Notch7

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    Blade is being deflected - it’s probably blunt.
     
    Last edited: 25 Aug 2021
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  10. Foresty Forest

    Foresty Forest

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    Is it possible I haven't put the blade on correctly? I'll have a closer look...
     
  11. JobAndKnock

    JobAndKnock

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    It's a lot more likely that the saw isn't set up quite right or the blade is deflecting due to bluntness or that the timber is warped or that the gence is a tad out of straight over its' length (a common defect with older Makitas used on sites - can't say for other brands). Have you actually done two mitre cuts in a piece of straight, planed timber and offered them up together (glue with mitre adhesive) then checked with a known good try square?

    You might be surprised to learn that even big box name mitre saws aren't always that accurate as bought
     
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