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Old 08-20-2010, 07:50 AM   #1
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technique- holding compass

as i've posted about before, i am trying to scribe a piece of molding so it fits snug against vinyl siding, as i finish my porch project.

what is the proper way of holding a compass when scribing against a wall?

or like this?

or does it not matter?

I've been trying to get this right, even purchasing a better compass, an accuscribe pro. the $2 compass I had kept collapsing. here is my most recent work trying to create a cardboard template:

large view

top, zoomed



thanks for your help!


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Old 08-20-2010, 08:41 AM   #2
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First of all, are the surfaces of your boards straight, or are they "cupped" (bowed inward)?

Secondly, are they evenly spaced?

And third, is the entire height of the wall a flat, straight line when you lay a straightedge across all the lower tips of the boards, or does the whole wall sway or bulge?

Good photos, by the way.


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Last edited by Willie T; 08-20-2010 at 08:44 AM.
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Old 08-20-2010, 08:44 AM   #3
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have a look at that tool
Short of cutting off a body part, the worst that can happen in woodworking is manufacturing really nice looking kindling. --- Quoted from lenaitch
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Old 08-20-2010, 04:51 PM   #4
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when I scribe like that i use the cheap ones with a small wing nut, The trick is to bend the metal tip away from the pencil at about a 60 degree angle and hold perpendicular to wall
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Old 08-21-2010, 08:29 PM   #5
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best i could do...looks good

looks clean. will probably paint.

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