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Thread: Straight edge
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24th October 2010, 07:21 PM #1Novice
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Straight edge
I don't know if this is the correct forum, if not please excuse and perhaps point me to the correct one.
I need to get straight edges to boards that I wish to "glue joint" together to form a table top. Most of the pieces have a small to medium bow (up to 5mm) and I would like to know the best way of getting the boards true before I route the glue joint. I can either use my router table or table saw to get the first edge and then I can put it through the table saw to get a parallel edge.
Any tried and true suggustions would be very welcome.
Regards Ingin
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24th October 2010 07:21 PM # ADSGoogle Adsense Advertisement
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24th October 2010, 08:12 PM #2
Why not just use your router with a straight edge? I use either a length of aluminium angle or special 6" board as a straight edge, just depending on what suits the job best.
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24th October 2010, 09:13 PM #3
Arrange the boards in a best fit to one another. Match-mark for identification, e.g. pen or pencil on masking tape. Place a scrap plank under each end, and screw to the boards from below. Using a straightedge fence clamped to the boards, run a circular saw along the ill-fitting joints, barely into the scrap planks, so that the blade engages both boards, even though it misses in some locations.
Remove the screws, and repeat the procedure, until all joints mate. If the maximum bow is about 5mm, two cycles should be sufficient (assuming 1/8" blade).
A hand-held router can work the same way, with only one cycle, but the depth of cut should be made in small steps.
Cheers,
JoeOf course truth is stranger than fiction.
Fiction has to make sense. - Mark Twain
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24th October 2010, 09:18 PM #4.
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25th October 2010, 07:57 AM #5Novice
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Thanks Joe, I will use the method described, but use my table saw and move the timber through the saw. Don't know why I didn't think of that. Trying to over engineer a simple task I guess.
Many Thanks
Regards Ingin
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25th October 2010, 09:55 PM #6
Same thing, but only two boards at a time. And probably simpler, too, because all the hand work is from above. The first board will have a bow to ride against the fence, so I'd attach a straightedge with the appropriate overhang to guide it. For subsequent joints, the previously-straightened edge can ride the fence. Thus, it's really important to match mark the boards. OTOH, you can still use the straightedge, taking care to not create a fan-shaped final layout.
Cheers,
JoeOf course truth is stranger than fiction.
Fiction has to make sense. - Mark Twain
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27th October 2010, 08:20 AM #7Awaiting Email Confirmation
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position two boards side by side hold in vise and electric plane them straight,
les
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27th October 2010, 10:31 AM #8Senior Member
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Straight edge
Tried and proven method over the ages is not to rely on a machined edge particular if you require a near to perfect joint. Prior to gluing up finally shoot straight the edges to be glued with a no 6 or 7 Stanley trying plane ( by hand).Use a straight edge and finally check the joint for fit to its adjoining piece.
Cheers
Mac
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