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| Author: | Greenman [ Wed Oct 10, 2007 12:51 pm ] |
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Visited a local Luthier yesterday and saw something really slick and I am going to steal the idea. He had a spring loaded go-bar made from a 1/2 dowel a spring and 1/2 inside diameter pvc pipe. On one end of the pipe was a plug made of a short piece of dowel covered with leather. Then a spring went into the pipe and a length of dowel was on top of the spring. The long length of dowel was held in the pipe by a small wood screw that rode in a slot to give you your movement. When I get one made I will post a picture. I like the idea because the go-bar can sit squarely on the braces because they aren't bent. Tom Humphrey the luthier was the one that came up with the idea. |
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| Author: | WaddyThomson [ Wed Oct 10, 2007 2:09 pm ] |
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You mean, like this, sort of?   I saw something similar on a website showing a similar type of go-bar that a student of Romanillos was using, and found out that Romanillos uses a similar type. Mine is a simpler form than the one I saw. It is not quite finished yet, and this is the prototype of my design. |
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| Author: | John How [ Thu Oct 11, 2007 2:32 am ] |
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Julius Borges uses something very similar to those as well. My favorite go-bar idea (which I haven't tried yet) is from John Osthoff, A go bar on a lazy susan to make for easy cleanup. |
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| Author: | FishtownMike [ Thu Oct 11, 2007 7:49 am ] |
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I have seen footage of a gibson acoustic factory and they use something similar to this. Theirs use a spring loaded dowel in copper pipe. Theirs were only 6 to 8 inches long and they were used in a similar hight go bar deck. |
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| Author: | Heath Blair [ Thu Oct 11, 2007 12:33 pm ] |
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hmmm... 8" long (or whatever length) spring loaded dowels in a short go bar deck (wheels turning)... if the top of the go bar deck were clear, this could be pretty cool. just a thought. i dont know if thats enough room to move around in. |
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| Author: | WaddyThomson [ Thu Oct 11, 2007 2:48 pm ] |
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Seems like it would be hard to clean up glue squeeze-out if the top was that close. |
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| Author: | Heath Blair [ Thu Oct 11, 2007 4:18 pm ] |
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definitely |
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| Author: | WaddyThomson [ Fri Oct 12, 2007 4:04 am ] |
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Heck, my springs are 5" long fully extended. It'd be hard to make one only 8" long. I struggled to find springs that had enough travel to give clearance so you could insert the bars with a little flexibility. I figure on making some 3 3/4" inserts for the top end so I can have a fixed height for the deck top, and still use the bars for both braces and installing backs. |
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| Author: | FishtownMike [ Fri Oct 12, 2007 2:50 pm ] |
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This was old factory footage. If i can find it again i'll post it. They don't use this any more. At least i don't think they do. I have seen newer footage of them using vacuum press' for bracing. |
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| Author: | FishtownMike [ Fri Oct 12, 2007 3:00 pm ] |
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Her is the link to a picture tour of gibson montana from 1997. You'll se e the go bar deck. http://www.gibson.com/products/montana/tour/tour1a.html |
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| Author: | FishtownMike [ Fri Oct 12, 2007 3:02 pm ] |
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Their probably more like 10" long. |
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| Author: | Kevin Gallagher [ Fri Oct 12, 2007 3:44 pm ] |
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Before I went to vacuum systems for clamping my bracing, I used go bars that were made from 3/8" solid aluminum rods inside 3/8" I.D. aluminum tubing with a 5" long spring against a pin through each one. They provided nice consistent pressure and were adjustable by moving the pin into any of a series of holes along thet tubing. Regards, Kevin Gallagher/Omega Guitars |
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