Type: Adjustable Auto-Cycling
Vacuum: Air Powered Venturi
Page: 9 of 9
Mods and Options for the Project: V2 Vacuum System
The Project: V2 kit has only been available for a short while and already dozens of builders have contacted me with suggested modifications and options. So I've come up a bunch of parts and have re-worked a few aspects of the system to meet those suggestions. Dig in!
Vac Pro - Premium: 5.5 CFM of Vacuum Power
For most users, the 3.2 CFM of vacuum flow on the Project:V2 is more than enough air flow to pull down large bags. Be that as it may, some builders wanted even more vacuum flow for extremely large bags or bent lamination projects that leave sizable amounts of "free" air inside prior to vacuuming. Well... you want it? You got it!
I checked around and the least expensive air powered vacuum press that draws the same amount of vacuum CFM was $700. With the instructions found here and the kit components at VeneerSupplies.com you can build the system for about half of that price. So dig in, read on, and get building!
There are several aspects of the Project: V2 system that need to be considered in adapting the system for a higher flow venturi. I've measured some of the flow restrictions within the system and have methodically replaced each bottleneck to achieve maximum flow from the venturi to the bag connector. With the following parts, you can increase the flow from 3.2 to 5.5 CFM.
Here are some of the upgraded parts used in the Project: V2 Premium System
- Mac Valve: Series 200
- Venturi: Vac Pro Premium Series
- Larger diameter vacuum tube
- A huge, high flow check valve
- Larger fittings to accomodate the thicker tubing
- Plastic spacers to support the larger venturi
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. Contact me for details.
Low Voltage Wiring Option
Pro: Low voltage (24v DC) is safer than 110v AC line voltage.
Con: The average AC adapter has a shorter cord length of 6 ft versus an extension cord length of 8 to 12 ft.
This is a very simple modification that removes the 110 AC line voltage from the system. Here's what you'll need to go low-voltage on the project:
- Mac valve: 24 VDC
- AC adapter: 24 VDC @ 600 milliamps
The wiring is the same as shown in the website article. You'll need to cut off the connector (and discard it) at the end of the cord on the power-pack and strip back some of the insulation. There is no polarity to these DC wires so you can ignore any color coding in the wiring.
These low voltage parts are now available at VeneerSupplies.com
I've wanted to adapt the vacuum press system for vacuum clamping for quite some time. Of course it's not too difficult to hook the vacuum line from the system directly to a clamping board but I wanted something more durable and easier to use. The biggest restriction from making this adaptation a reality was the on/off control of the vacuum to the clamping jig. I wanted to build something that could shut off the vacuum without depleting the vacuum reservoirs.
Click here for details.
To be honest, I don't think a venturi system is the way to go for vacuum chucking.
Just about everything you could chuck on a lathe will have small fissures that will be prone to leaking. Even the rotary adapter itself may leak a bit at high pressure and rotation. This would cause the system to cycle very frequently. There's nothing wrong with the constantly cycling but if it did fail to cycle on for some reason, the work piece would launch off the lathe like the freagin' space shuttle. For electric pump based systems, I always recommend a small modification to make the system run continuously.
Click here for details.
What Are You Doing With Your Vacuum Press?
Feel free to send pictures and a brief summary of what you are doing with your vacuum press. I'd be happy to post it here. Share your vacuum success stories and you'll make this site more helpful to your fellow woodworkers!
Click here to see pictures of dozens of user-built vacuum press systems.