JoeWoodworker Veneer
The Official Website of this Non-Professional Woodworker ™

Part 1

Veneering Basics

14 Good Reasons
Vacuum Press Uses
Vacuum Press Options

Questions & Answers
Part 2a (Option 1 of 2)
Project: V2 Venturi Press

About Project: V2
Parts List
Build the Manifold
Build the Reservoirs
Assemble the Venturi
Make the Carrier
Wire the Press
Testing and Adjusting
Mods and Options
Part 2b (Option 2 of 2)
Project: EVS Pump Press

About Project: EVS
Parts List
Pump Selection
Build the Manifold
Build the Sub-Manifold
Build the Reservoirs
Make the Carrier
Final Assembly
Wire the Press
Testing and Adjusting
Mods and Options
Part 3
Vacuum Bagging

Vacuum Bag Basics
Polyurethane vs. Vinyl
DIY Vacuum Bags (A)
DIY Vacuum Bags (B)
Connect the Bag
Bag Closures
Bag Platens
Breather Mesh
DIY Frame Press

Part 4
Veneer Information

About Veneer
Veneering Glossary
Veneering Myths
Balancing a Panel

Veneer Glues
Veneering Tips
Substrate Materials
Flattening Veneers
A Sharp Veneer Saw
Jointing Veneers
Taping Veneers
Dealing with Defects
Curing Glued Panels
Veneering w/o Vacuum
Hammer Veneering
Iron-On Veneering
Veneer Storage
Amazing Bookmatches
Copper Veneer Guide
Paperbacked Veneer

Edgebanding Guide

Part 5
Miscellaneous Info

Vacuum Press FAQ
Veneering FAQ
Veneer Glue FAQ
Copper Veneer FAQ

Vacuum Forming
Vacuum Chucking
Vacuum Clamping Pedal
Vacuum Clamping Jigs
Vacuum Clamp Matrix
DIY Vacuum Manifold
Vacuum Press Gallery 1
Vacuum Press Gallery 2

Downloads (PDF's)

EVS Logo Information
Type: Adjustable Auto-Cycling
Vacuum: Electric Pump
Overview Thumbnail

Why does the Project: EVS system need a sub-reservoir, reservoir, check valve, gauge, Mac valve, and all of the other pieces?

In a perfect world, you'd only need to connect the intake of the vacuum pump to a tube which would be connected to a vacuum bag to have a working vacuum press. All of the "extras" on the Project: EVS system might seem a little unnecessary but each has a place and purpose on an auto-cycling system.

The Vacuum Gauge
Obviously, the gauge shows the user the vacuum level inside the system. More importantly, it shows the user if there is a leak. When the system cycles off, the needle on the gauge will move subtly, but it's enough to indicate when a leak is present.
Vacuum Gauge

The Vacuum Controller
Without this piece, the system would run continuously. This is fine if you don't mind the 74 decibels of sound being continuously emitted from the pump or if you are not bothered by the waste of electricity from a pump that has to run for the entire duration of the pressing. The vacuum controller monitors the vacuum level and cycles the system on and off as needed.
Vacuum Switch

The Vacuum Reservoirs
If you are going to have a system that cycles on and off, you certainly don't want it to cycle too frequently. This is bad for the pump and it's just plain annoying. The reservoirs hold spare vacuum just like scuba tanks hold air for divers. If you have an air compressor in your shop, you certainly understand that a larger tank on an air compressor means that it will cycle on less frequently. The same is true of the vacuum reservoirs.

The Mac Valve/ Sub-Reservoir/Breather Fitting
Once you have established that you need a reservoir system and a vacuum controller, you then find out that the pump will not restart when there is vacuum pushing backwards against the pump's intake port. Therefore you need a way to vent off the pressure from the pump when it cycles off. This is accomplished with a Mac valve which directs air flow to either the main reservoirs when additional vacuum is needed or to an exhaust port when the system cycles off. This exhaust is simply a removal of pressure from the pump so that it can easily restart on the next cycle.

The Check Valve
The check valve is required to prevent a backwash of vacuum into the subreservoir when the system cycles on and the Mac valve opens.

Head Assembly

The Vacuum Valve
The vacuum valve allows you to pre-charge the reservoirs with vacuum which will give you a short burst of vacuum in the initial pull-down of the vacuum bag.
Vacuum Valve

Click here to return to the Project: EVS instructions

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