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  1. 2nd February 2007, 02:50 PM #1
    havenoideaatall's Avatar
    havenoideaatall
    havenoideaatall is offline Built a workbench 101
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    Default The world is not straight

    Some of you will remember my posts from the winter just about to gear up.

    Well I've been busy making a router table which clamps to my workbench for jointing/trimming etc (I've told my wife this will see me on the way to endless treasures) and the problem I've observed is cutting straight with hand power tools even with a guide - or finding that no amount of measuring seems to beget something really true. There is always an error somewhere!

    You make all these jigs to get a straight edge and accuracy - but need to get these straight first. Even clamping a straight-edge as a fence seems to bring challenges! 1mm out this way, now 2mm out this way...I bet even my set square is out somewhere..

    God help me when I move on to the free-standing structures like sheds and chook houses.

    As my old man said, 'the world is not straight!!!' I find it a wonder people build houses that appear straight at all....
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  2. 2nd February 2007 02:50 PM # ADS
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  3. 2nd February 2007, 03:19 PM #2
    Just George
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    Without trying to appear stupid, maybe I missed something.


    Are you making a statement or are you asking for assistance?
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  4. 2nd February 2007, 03:28 PM #3
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    Dear Havenoideaatall,

    You've just reminded me of why I like curves in my woodwork so much
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  5. 2nd February 2007, 03:30 PM #4
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    havenoideaatall is offline Built a workbench 101
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    Quote Originally Posted by Just George View Post
    Without trying to appear stupid, maybe I missed something.


    Are you making a statement or are you asking for assistance?
    Honarary Bloke's thread about mistakes gave me the idea. It was a statement - and one thing I didn't say was, by doing all this, I'm learning along the way! Even when I could go and buy myself the stuff I am making.

    cheers
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  6. 2nd February 2007, 03:44 PM #5
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    Same goes for rooms - corners are never square & walls are never flat. Found out from experience trying to build some built-in robes
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  7. 2nd February 2007, 04:53 PM #6
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    Depends on who built the place. The only place I built from scratch was within 3mm of all dimensions measured to the centreline of the framing members. Not bad considering it was built out of 10" x 10" roughsawn posts and roughsawn oregon framing which was all +/- 3 to 4mm.
    But yeah, gyprock corners, both internal and external are rarely square even if the underlying frame is spot on.

    Mick
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    tomorrow you will have paid for it and not have it."

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  8. 2nd February 2007, 05:15 PM #7
    pawnhead
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    Quote Originally Posted by journeyman Mick View Post
    Depends on who built the place. The only place I built from scratch was within 3mm of all dimensions measured to the centreline of the framing members. Not bad considering it was built out of 10" x 10" roughsawn posts and roughsawn oregon framing which was all +/- 3 to 4mm.
    But yeah, gyprock corners, both internal and external are rarely square even if the underlying frame is spot on.

    Mick
    Yeh, I think I recall that the standards allow for a tolerance of no more than +/- 3 to 4mm measured with a straight edge/level, in any direction. I reckon that you could fail just about any new house with a timber frame under those tolerances. Plasterboard internal and external corners always bulge a bit with the thickness of the setting or angles.

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  9. 2nd February 2007, 06:48 PM #8
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    Quote Originally Posted by Ivor View Post
    Same goes for rooms - corners are never square & walls are never flat. Found out from experience trying to build some built-in robes
    This is why when you need more or extra work done, the ideal way to go is to get the bloke who built the place in the first place. My reasoning behind this is, if the bloke had a leg 3mm shorter than the other, the work he did in the first place would be spot-on to him. You come along and it's all out of wack, solution = wear a thong on one foot and a work boot on the other, if it's further out, swap'em and it should be right!....Ha!Ha!
    savage(Eric)

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