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First HWS - 7'6" egg 
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Joined: Fri Jul 27, 2007 9:13 pm
Posts: 48
Location: Maple Valley, WA
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Unread post Re: First HWS - 7'6" egg
Nice work on the board. Very clean.

I am interested in your DIY vacuum pump. It looks like you are using a compressor. Could you elaborate on your setup and how you did it? I have been wanting to experiment with using bagging in simplifying the lamination process for building HWS.

Tue May 10, 2016 3:28 pm
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wood butcher wannabe

Joined: Mon Sep 29, 2014 5:50 am
Posts: 16
Location: The Netherlands
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Unread post Re: First HWS - 7'6" egg
@cschepel: It is a little bit difficult to explain for me in Englisch but I'll do my best:

I built the vacuum pump myself. It is a setup with a refrigerator compressor which can be used as a vacuum pump if you put the vacuum hose on the inlet of the pump. This refrigerator pump pulls a vacuum of -0,93 Bar so the pressure is almost a full vacuum. I used about -0,5 Bar pressure to glue the wooden panels to the frame. More pressure can crush the panels or the internal structure of the board.

I used an Arduino to program an automatic stop. I can turn the potentiometer to a desired pressure and the pump will pull it till that pressure is reached. I programmed that the pump turns on automatically when the pressure reduced 0,1 Bar from the desired pressure.

Arduino = "Arduino is an open-source electronics platform based on easy-to-use hardware and software. It's intended for anyone making interactive projects."

I used a vacuum sensor to measure the live pressure. This sensor sends a signal to the Arduino and I connected a relais to switch the refrigerator pump on and off.

Mon May 23, 2016 2:06 pm
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Joined: Fri May 22, 2009 6:08 pm
Posts: 2297
Location: Northumberland, UK
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Unread post Re: First HWS - 7'6" egg
Definitely interested in the pump / arduino set up - I'd like to try that method. I'm about to start experimenting with arduino and neopixels.


Fri May 27, 2016 5:30 pm
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Sun Nov 19, 2017 9:15 pm
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Tue Nov 28, 2017 11:32 pm
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