I use it for everything; lam glue-ups, hold-down, etc. I have a 28" HG venturi system for gluing and a BOC Edwards 30 CFM pump for holding. Couldn't live without it. Well, wouldn't want to at least.
Warning; it's addictive...
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| Author: | Andy Zimmerman [ Wed Aug 02, 2006 2:33 am ] |
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I am curious, how many of you use vacuum for bridge clamping, brace clamping, guitar holding etc. Do you like it?? Do you use the LMI pump etc??? TIA |
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| Author: | John Watkins [ Wed Aug 02, 2006 3:27 am ] |
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I use it for everything; lam glue-ups, hold-down, etc. I have a 28" HG venturi system for gluing and a BOC Edwards 30 CFM pump for holding. Couldn't live without it. Well, wouldn't want to at least. Warning; it's addictive...
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| Author: | Pwoolson [ Wed Aug 02, 2006 3:41 am ] |
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Like John, I couldn't live without it. I have drawers in my bench that are for vacuum clamping braces. I'm in the process of rebuilding them because I have micro leaks that i can't find. It still holds about 22 in/hg but has to work nonstop to do that. If the system were tight, it would be able to shut off and rest for cycles. Check ebay for vacuum pumps. Also joewoodworker.com has some great information for getting started. |
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| Author: | Todd Rose [ Wed Aug 02, 2006 4:31 am ] |
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So far, I just use mine for clamping bridges, but I imagine I'll use it for more and more things as time goes on. I got a good pump on eBay, after exchanging several emails with the seller to satisfy myself that he was honest and knowledgable about pumps, and that it wasn't from a lab that could have contaminated it with pathogens (these pumps are used in ways that could do that). |
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| Author: | crazymanmichael [ Wed Aug 02, 2006 5:02 am ] |
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i use it for everthing i can think of. as someone said above, it is addictive!!! i have 2 venturi systems off the compressor and two vacuum pumps. |
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| Author: | RussellR [ Wed Aug 02, 2006 5:16 am ] |
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I only use it for bridges at present, I bought a pump off ebay, I would like to get one of those Guitar holders, they look cool 
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| Author: | Jim Watts [ Wed Aug 02, 2006 5:23 am ] |
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I use one also for bridges and braces and like it a lot. As far as a pump goes I have Gast rotary vane pump that has worked well for a long time. |
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| Author: | Bill Greene [ Wed Aug 02, 2006 8:34 am ] |
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Would anyone be able, or willing, to share a definitive method of building one of the jigs for vacuuming the braces onto tops and backs, preferably with photos? As soon as John Watkins starts building THOSE puppies, watch'em fly off the sales page. Bill |
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| Author: | BobK [ Wed Aug 02, 2006 10:34 am ] |
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Here's what I made. Basically just a plywood box large enough to hold my sanding bowl with lots of shellac and caulk to keep it airtight. I've used it on 3 guitars and the process itself works very well. The only problem is that on the last guitar the pressure caved in one corner of the mdf ring that circles the sanding bowl. (I thought if I didn't have the ring the rubber would either distort the pieces being clamped or tear as it compressed all the way down to the bottom of the box.) It's still airtight, but could probably use a redesign. I'm going to cut ply fillers to replace the styrofoam inserts. That is unless someone has an idea for a better jig. 
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| Author: | Sprockett [ Wed Aug 02, 2006 12:03 pm ] |
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Andy I use it for braces, laminates and bridges, if you go to my site and dig around the shop photos there are some pictures of my press in there, I got my design inspiration from Mike Doolin. On my list of items is a commercial vaccum pump that can pull constant vaccum without burning out, right now I'm using a high grade PIAA venturi that works really well but I hate beating up my Air Compressor with it. Also at some point I'll make one out of metal as opposed to wood and use proper seals so it can hold a vaccum better (although it's not too bad now, it could be better)... If needed I can post pictures here, the best one I ever saw used a clear membrane so you could actually see what you where clamping, I thought that was the bomb but could never find the material so I just use the stuff from LMI. Cheers -Paul- |
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| Author: | Rod True [ Wed Aug 02, 2006 2:04 pm ] |
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Here are a couple of pictures from Jim Olson's web site of his rig. The UHMW (white plastic inside) is shaped to the back arc and the little tabs help to locate the braces, cool hey? 
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| Author: | Jocafa [ Wed Aug 02, 2006 4:58 pm ] |
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Have any of you tried the thin air press from Roarockit? I'm thinking about using it for my project. |
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| Author: | tippie53 [ Wed Aug 02, 2006 9:02 pm ] |
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I use the bag and luthier disk. Simple and it works though I admit some of these jigs are darn nice john hall |
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