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Posted: Fri Mar 23, 2012 8:57 am
by twizzstyle
Jibber wrote:Why are people building a setup like this? I just let my pump run for 24h hours...
Thanks, Christoph
I'm with you... vacuum pumps are designed for 100% continuous running. I've had mine run for over a week with no issues (forgot about it, oops!)
Posted: Fri Mar 23, 2012 2:16 pm
by OAC
Yes, I've switched to continous on the latest builds. I got a problem with "slushy" oil and was told that continous and regulate the ballast would do the trick. It didn't solved it 100%, but much better. I believe the "slush" comes of some reaction with the release wax I use.
Posted: Sun Apr 01, 2012 12:45 pm
by SouthLakeBoarder
What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!
Posted: Sun Apr 15, 2012 2:58 pm
by hegan
would this work for the vacuum pump, or is it to small?
http://www.veneersupplies.com/products/ ... ystem.html
Posted: Sun Apr 15, 2012 5:32 pm
by troublemaker
Seems small to me. It only flows 1.1 CFM, and oil-less but it's built by Gast so probaly a quality pump. I have HVAC vacuum pump that I bought on CraigsList that flows 6CFM for $75 bucks! CraigsList is a great place to find this kind of stuff.
Posted: Sun Apr 15, 2012 6:02 pm
by hegan
troublemaker wrote:Seems small to me. It only flows 1.1 CFM, and oil-less but it's built by Gast so probaly a quilty pump. I have HVAC vacuum pump that I bought on CraigsList that flows 6CFM for $75 bucks! CraigsList is a great place to find this kind of stuff.
been checking craigslist but nothing at all, and thats for 3 states!
how about this one
http://www.veneersupplies.com/products/ ... ystem.html
Posted: Sun Apr 15, 2012 6:16 pm
by troublemaker
Well, I'll look around around here and see what I can find and if I can find something that will work I'll send it to you.
Posted: Sun Apr 15, 2012 6:18 pm
by troublemaker
Posted: Mon Apr 16, 2012 8:19 am
by twizzstyle
SouthLakeBoarder wrote:What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!
You can't have more than 1 atmosphere (~14.7psi at sea level) of pressure with a vacuum pump, unless you use an autoclave. If you're doing vacuum pump, you want to achieve the strongest vacuum you can (1 atm). Only way to get more pressure is autoclave, or go fire hose.
Posted: Tue Apr 17, 2012 8:42 am
by SouthLakeBoarder
twizzstyle wrote:SouthLakeBoarder wrote:What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!
You can't have more than 1 atmosphere (~14.7psi at sea level) of pressure with a vacuum pump, unless you use an autoclave. If you're doing vacuum pump, you want to achieve the strongest vacuum you can (1 atm). Only way to get more pressure is autoclave, or go fire hose.
Ah, I gotcha. I'm still super new to this hobby (as you can likely tell
), and I just wasn't sure what the norm for pressing with a vac was. Thanks for clarifying that!
Posted: Thu Apr 19, 2012 6:40 am
by AllgäuSki
My Vacuum Pump gets a pressure of 600 to 700 mbar. It was a very cheap pump (used for like 70€). I'd like to achieve just a little bit more pressure... therefore my question: does it make sense to combine two smaller Vacuum Pumps to get closer to the absolute vacuum? Or does it make more sense to have a closer look at the sealing?
Posted: Thu Apr 19, 2012 7:43 am
by sammer
Can your pump pull more than that?
Hook your gauge to the port where it sucks and see what you get. Then compare to the chart.
http://www.engineeringtoolbox.com/air-a ... d_462.html
If you're not pulling max for your altitude get a new pump.
If you're getting less at your bag you've gotta deal with your sealing.
sam
Posted: Tue Sep 25, 2012 1:53 pm
by hegan
worth buying or no?
Posted: Tue Sep 25, 2012 3:43 pm
by sammer
hegan wrote:worth buying or no?
Wow... Your still looking for a vacuum pump?
That will work but at 1.5cfm's will take a while to evacuate your bag and will have a hard time keeping up to any leaks.
3cfm would be my minimum.
The one I'm using now is 5.5cfm still takes a few minutes to pull full vacuum.
sam
Posted: Tue Sep 25, 2012 4:16 pm
by hegan
Well I was given one and it ran ok for a little while until it broke last week,
how about this one?