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The
Official Website of this Non-Professional Woodworker ™
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Final Pneumatic Connections & System Testing You're almost done! Within the next few minutes you'll be ready to run the veneer press!
The final assembly should appear as shown in the picture below.
Testing and Adjustment With the light switch turned off, plug the electrical cord into your wall socket. No air should flow through yet. Flip the switch and air should begin flowing through the venturi. The needle on the vacuum gauge should rise. The vacuum controller should shut off before it reaches 21" of Hg. For the next stage of testing, you will want to carefully adjust the vacuum setting to 21". Using a small flat screwdriver, slowly turn the adjusting screw counter-clockwise until the unit creates 21" of vacuum and cycles off. Remember counterclockwise turns of the screw will increase the amount of vacuum required before the vacuum controller will turn off the air pressure at the Mac valve. I've found that most often, 21" of Hg is when there is about 1/8" of threads showing above the adjustment screw. It will automatically cycle on again when the vacuum has decreased. You can test this by opening the vacuum valve and releasing a bit of pressure from the system. The manufacturer of the vacuum controller claims that the controller will cycle back to the "on" mode within 4" of Hg decrease. This 4" amount of "differential" is not adjustable. In my opinion, this constant increase and decrease in vacuum pressure inside the press bag allows for an even greater bond of the veneer to the substrate. For venturi systems, the frequent on and off cycling is harmless. During normal operation of a tightly sealed unit, it is still common to have the unit cycle on every 10 minutes for 5 - 8 seconds. Close the vacuum valve and allow the system to recharge. Watch the needle on the vacuum gauge to see if the system shows signs of a leak. It shouldn't leak if the brass fittings were correctly attached to the reservoir with thread-sealing tape. However, it's not uncommon to have a small leak show up. The fix for this is simple.
Congratulations... your Project: V2 system is complete! If you decide to upgrade your air compressor and would like a faster and more powerful vacuum, be sure to check out the V2 Premium which is now available in an upgrade kit for the standard V2 and V2 Plus systems. Is there something that would improve this article? Misspellings, grammatical errors, or something that just doesn't make sense? Feel free to email me with any questions or suggestions about this article. I've spent countless evenings working on this project and even more time creating this article. I look forward to your comments and suggestions. You can help to keep this article on the Internet by purchasing various components of the vacuum system and other veneer |
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