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| New Luthier Tips du Jour video - Laminating sides http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=50557 |
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| Author: | Robbie O'Brien [ Mon Apr 23, 2018 10:18 am ] |
| Post subject: | New Luthier Tips du Jour video - Laminating sides |
Here is the latest Luthier Tips du Jour video - In this video I show how to laminate sides without an electric vacuum pump. This video as well as all my other videos are available via my website, http://www.obrienguitars.com/videos , LMI's website or on youtube. |
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| Author: | jfmckenna [ Mon Apr 23, 2018 1:19 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
THat's pretty sweet I've never seen a vacuum bag with it's own pump like that. |
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| Author: | sdsollod [ Mon Apr 23, 2018 4:12 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
I found this video interesting. I know it's about laminating sides, but I was thinking the vacuum bag could be used for top and back braces. I currently use a vacuum pump to glue my top and back braces. It doesn't take up as much space in the shop as a go bar deck. I thought that the 26" x 28" bag would be suitable for top and back bracing, but I wish the valve was located at a corner rather than in the center of the bag... |
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| Author: | sdsollod [ Mon Apr 23, 2018 4:18 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
I just realized that the bag would also need to accommodate the radius dish... |
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| Author: | meddlingfool [ Mon Apr 23, 2018 4:28 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
Or simply one of Josh House's raduis workboards that are guitar shaped... I wonder if you could ask to have the valve placed in the corner? |
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| Author: | rlrhett [ Mon Apr 23, 2018 9:24 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
You can get a bag big enough from veneersupplies.com that are just the right size for a radius dish. How do I know? I got one and use it for that. Also the valve is surface mounted, so it doesn’t interfere much at all. One thing Robbie doesn’t use that I think makes a big difference is breather cloth. I know people who successfully use mosquito screen, but I like this: https://www.veneersupplies.com/products ... shNet.html Sent from my iPhone using Tapatalk Pro |
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| Author: | Alex Kleon [ Mon Apr 23, 2018 9:47 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
The pump looks like the ones used to vacuum wine bottles after they've been opened. Pretty slick! Alex |
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| Author: | Robbie O'Brien [ Tue Apr 24, 2018 10:44 am ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
rlrhett wrote: You can get a bag big enough from veneersupplies.com that are just the right size for a radius dish. How do I know? I got one and use it for that. Also the valve is surface mounted, so it doesn’t interfere much at all. One thing Robbie doesn’t use that I think makes a big difference is breather cloth. I know people who successfully use mosquito screen, but I like this: https://www.veneersupplies.com/products ... shNet.html Sent from my iPhone using Tapatalk Pro Take a look at 9:30 in the video. I mention and show using a small piece of breather material around the vacuum intake. |
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| Author: | Clay S. [ Tue Apr 24, 2018 12:23 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
I wonder if a scotch brite pad would work as breather cloth? |
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| Author: | rlrhett [ Tue Apr 24, 2018 1:10 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
Robbie O'Brien wrote: rlrhett wrote: You can get a bag big enough from veneersupplies.com that are just the right size for a radius dish. How do I know? I got one and use it for that. Also the valve is surface mounted, so it doesn’t interfere much at all. One thing Robbie doesn’t use that I think makes a big difference is breather cloth. I know people who successfully use mosquito screen, but I like this: https://www.veneersupplies.com/products ... shNet.html Sent from my iPhone using Tapatalk Pro Take a look at 9:30 in the video. I mention and show using a small piece of breather material around the vacuum intake. Yes, I meant along the entire length of the side. The bag can seal against itself anywhere, not just at the valve. That is how I was taught to do veneering, with either breather mesh or a platen with grooves across the entire piece and I use that technique for laminated sides and plates. To me it is important, but obviously you were able to do a successful lamination with only a small piece at the valve. Nonetheless, I still would recommend the breather mesh I linked to above. |
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| Author: | Barry Daniels [ Tue Apr 24, 2018 1:47 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
How much vacuum pressure can you achieve with the hand pump? |
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| Author: | Robbie O'Brien [ Tue Apr 24, 2018 2:29 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
rlrhett wrote: Robbie O'Brien wrote: rlrhett wrote: You can get a bag big enough from veneersupplies.com that are just the right size for a radius dish. How do I know? I got one and use it for that. Also the valve is surface mounted, so it doesn’t interfere much at all. One thing Robbie doesn’t use that I think makes a big difference is breather cloth. I know people who successfully use mosquito screen, but I like this: https://www.veneersupplies.com/products ... shNet.html Sent from my iPhone using Tapatalk Pro Take a look at 9:30 in the video. I mention and show using a small piece of breather material around the vacuum intake. Yes, I meant along the entire length of the side. The bag can seal against itself anywhere, not just at the valve. That is how I was taught to do veneering, with either breather mesh or a platen with grooves across the entire piece and I use that technique for laminated sides and plates. To me it is important, but obviously you were able to do a successful lamination with only a small piece at the valve. Nonetheless, I still would recommend the breather mesh I linked to above. You are correct. A breather material along the entire surface would probably be best. |
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| Author: | kwerry [ Tue Apr 24, 2018 10:01 pm ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
meddlingfool wrote: Or simply one of Josh House's raduis workboards that are guitar shaped... I wonder if you could ask to have the valve placed in the corner? I Use exactly that (Josh's workboard) with these bags and it works great.. I think they might move the valve, they are pretty accommodating, but I find it right over the X is not an issue.. Also remember you need to get the air to the valve as the bag collapses.. Also I should say I don't have the new fancy valve Robbie shows mine is the basic one as this new one was not available when I got these.. Also I'm just testing a different method of sealing the bag. I find after a bunch of uses the sealing gasket gets pretty messed up and while it is pretty easy to replace I have not found any place I can buy it locally.. Lee Valley carries it but not stocked in their stores.. So I am trying method 3 listed here WITHOUT any gasket material.. so far it seems to be working.. I literally just tried it tonight! https://www.joewoodworker.com/veneering/clamps.htm Anyway bottom line nice product and from my experience a good company to deal with. Kerry |
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| Author: | Colin North [ Wed Apr 25, 2018 5:03 am ] |
| Post subject: | Re: New Luthier Tips du Jour video - Laminating sides |
Barry Daniels wrote: How much vacuum pressure can you achieve with the hand pump? Claim from their website - Quote: Canada which is 500 feet above sea level. At this altitude our manual system will produce around 26 HG which is 13.08 pounds of pressure per square inch
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