Official Luthiers Forum!

The vacuum holder sold by lmii looks like a nice solution for holding the guitar, but I was told the pump has to run continuously while holding the guitar, is the pump unpleasantly loud and noisy? Also, do you have time to catch the guitar in the event of a power failure.

Build the system that Joe Wood worker has on his site... You don't need to run it continously.

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Brock Poling
Columbus, Ohio
http://www.polingguitars.com

I agree
I just finished building the Joe Woodworker EVS system. Since in has a
subresevoir and 2 main resevoirs it doesn't need to run continuously

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Andy Z.
http://www.lazydogguitars.com

Brock, I'm a little lost on the Joewoodworker site, found a lot on veneer clamping but didn't find a holder system of any kind. I assume you meant there was a pump system that works with the lmii holder? If so, which one?

Yes the joe woodworker site is about the pump systems. I built the EVS
system with a Gast pump and it is very nice. You could just use the pump
directly, but the EVS system has reservoir tanks to keep it from running
continuously. Also, the controller allows the pump to kick on if their is a
drop in vac by 4. Very well designed and easy to build. I also use the foot
switch which allows you to turn it on and off without dumping the vacuum
pressure. A very nice addition to the system.   I have the LMI holder and it is
very well designed.

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Andy Z.
http://www.lazydogguitars.com

Thanks Andy,

How often does the EVS system have to cycle while holding a guitar?

It depends on how airtight your system is. I would say every 10 minutes or
so. And when it does it only does it for a few seconds to recharge.

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Andy Z.
http://www.lazydogguitars.com

Marc, it depends on how tight your system/seals are. Mine cycles for about 1 minute about every 10 minutes when I'm on the pod. My clamping drawer is much more often as it's not very tight.

and which model Gast pump did you use?

I have the 5.5 CPM double piston. You could use a cheap refrig pump, but
they may not pull enough vacuum

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Andy Z.
http://www.lazydogguitars.com

Thanks everyone, I think I understand now.

[QUOTE=azimmer1] It depends on how airtight your system is. I would say every 10 minutes or
so. And when it does it only does it for a few seconds to recharge. [/QUOTE]

and how big your tanks are. I went with 2 30" tanks rather than 2 15" and mine only runs every 15 minutes or so.

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Brock Poling
Columbus, Ohio
http://www.polingguitars.com