How would you clamp this? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 5 Old 03-04-2016, 01:09 PM Thread Starter
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How would you clamp this?

I'm building a display case that basically consists of a base, four posts and a top. Glass will fit into slots in the posts. I've made the posts with round tenons on one end; it will fit into a round hole in the base. Sounds simple, but I've done some dry clamping runs and the clamp seems to make the post want to go out of square from the base. It just seems like the weight of the clamp is enough to make the post go wonky. Not much, but I need it to come up straight to accommodate the glass. Any ideas for how to provide enough clamping pressure to make everything stays put while the glue dries without making it go out of square??
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post #2 of 5 Old 03-04-2016, 02:27 PM
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Consider building a fixture to hold the two pieces in alignment - perhaps on a horizontal plane rather than up-right. Be safe.
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post #3 of 5 Old 03-04-2016, 03:06 PM
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I would use a band clamp or two. If you don't have one (or that large) use a couple cargo straps . Get them good and tight. To square it, measure from apposing corners. Make adjustments till there the same measurement. Then temporarily tack some thin boards in the corners to hold form. Preferably on the back so it would be seen. Let it dry and there you have it. I have a project coming up, in the next weeks, that uses this technique on my YouTube channel.
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post #4 of 5 Old 03-04-2016, 05:45 PM
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I would make or buy two of these and clamp them to your leg and top to keep them aligned.

http://www.rockler.com/clamp-it-assembly-square
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post #5 of 5 Old 03-04-2016, 05:56 PM
where's my table saw?
 
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another easy method

Set your legs in the holes, dry. Measure the distance between them on the flats at the very bottom and rip a 3/4" piece of plywood to that dimension. Back it up at either end with some more scraps to provide a clamping surface. It will it exactly between the legs for your vertical support in one axis. Then take another scrap of plywood and screw it in the center of the first piece to act as a leg, which will hold it vertical in the other axis. Put the glue on and clamp it up... it's a "no fail" jig, uses no special clamps and just some scrap wood. It's bit of extra work, but it will guarantee verticals in both axis.

It's gonna look like a "T" when you are finished.


The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 03-04-2016 at 06:06 PM.
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