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| OT--how to make perfect mitre cuts... http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=2423 |
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| Author: | John Elshaw [ Sat Jul 09, 2005 1:06 pm ] |
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My wife puts up with an aweful lot with me building guitars and spending all kinds of money on tools. This weekend she asks me to cut a picture frame out of some nice oak frame molding, and for the life of me I can't get a perfect mitre cut. I have tried both my power compound mitre saw as well as my table saw, and while they're close, everytime I try to glue it up with 4 corner clamps, I can't seem to get a perfect square fit. Does anybody have any tips on how to get a perfect square frame? My wife will never believe I can build a guitar but can't cut a square frame. Any help would be greatly appreciated. Thanks! John |
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| Author: | Don Williams [ Sat Jul 09, 2005 2:17 pm ] |
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Actually, that's one of the hardest things to do. Most picture framers who cut mitres use a slicer thing that looks a little like a sideways guilotine, which is set at a perfect 45 degree angle. It's very hard to do without a perfect 45 deg setup. Precision is everything, and then once you get the angle dead-on, you have to get the lengths of the sides exact. Good luck! |
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| Author: | Terry Stowell [ Sat Jul 09, 2005 11:17 pm ] |
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Howdy John, Also, some molding does not have a flat back. so when you flip it around to cut the other end, it tips the OTHER way and well, you know the rest. |
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| Author: | Tim McKnight [ Sun Jul 10, 2005 12:28 am ] |
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I cut them on my tablesaw and have always had good success. I use a drafting 45* square to set the angle on my miter gage relative to the blade. I also rip the frames wide enough to allow installion of a small bisquit in the joint. |
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| Author: | D.L.Huskey [ Sun Jul 10, 2005 12:56 pm ] |
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John, I have 2 sets of framing clamps, neither set will hold a frame square. You may want to check to see if yours are square. Mine are not the better of the clamping world though. One set is craftsman and I don't remember what the other is. |
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| Author: | Chas Freeborn [ Sun Jul 10, 2005 1:57 pm ] |
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Before I had a Glider saw ( a long gone printers sliding table saw designed for trimming old fashioned lead type blocks), I did the final fit with a shooting board and a plane. -C |
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