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 2
Project: EVS Vacuum 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
Veneering 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
Page: 10 of 11
Vacuum Connector Thumbnail

Testing and Adjusting
Close the vacuum valve on the main reservoir. Plug in the AC cord and turn the system on. The pump should turn on and air should begin moving through the system. If the pump does not start or only runs briefly, be sure to adjust the vacuum controller (see next paragraph) before you re-examine the wiring.

Notice that there is a small plastic cap on the vacuum controller just in front of the "common' tab. Under this cap is where the adjustment is made for setting the amount of vacuum inside the unit. You can pop of the cap with small flat screwdriver.

Vacuum Controller Adjustment

For the next stage of testing, you will want to carefully adjust the vacuum setting to 21". With the system powered up, use a small flat screwdriver to slowly turn the adjusting screw counter-clockwise until the unit creates 21" of vacuum and turns off. Do not touch the tabs or bare wire on the vacuum controller while the unit is plugged in.

Remember: Counter-clockwise turns of the screw will increase the amount of vacuum required before the controller will turn off the system. I've found that most often, 21" of Hg is when there is about 1/8" of thread showing above the adjustment screw. Re-attach the plastic cap to the vacuum controller when the desired vacuum level adjustment is set.

The system will automatically cycle on again when the vacuum has decreased. The manufacturer of the vacuum controller claims that the unit will cycle back to the "on" mode within 4" of Hg decrease. This 4" amount of differential is not adjustable.

During normal operation of a tightly sealed unit, it is common to have the unit cycle on every 15 minutes for 10 - 30 seconds. The length of time depends on the size of the vacuum bag, pump and reservoirs.

After the system has automatically turned off, watch the needle on the vacuum gauge to see if it shows signs of a leak. It's not uncommon to have a small leak show up. The fix for this is simple. Read on, my friend.

Got a Leak?  No Problem!

The typical auto-cycling vacuum press system recharges the vacuum every 15 minutes. This is just an average and it's based on the vacuum valve being closed so that no vacuum is directed to the vacuum bag. However, some people get a perfect seal and the system does not leak down for 24 hours or longer. How much fiddling you want to do to get a longer "off" time is up to you. Some people go nuts with it and others dont seem to worry about it at all.

Click here for leak troubleshooting tips.

Finishing Up

Parts used in this section: Time: Tools:

Braided vinyl tubing (3/8" ID) - 10 ft.
Lock-on connector
Brass barb fitting  - 3/8" barb to 1/4" NPT-male

5 minutes


  1. You can now attach the 10' piece of 3/8" ID braided vinyl tubing to the brass fitting on the vacuum valve.
  2. Apply thread-sealing tape to the 3/8" barb to 1/4 NPT-male fitting.
  3. Lock On ConnectorAttach the barbed fitting to the lock-on connector. Be sure to hold the lock-on connector at the hexagon part of the casting when attaching the barbed fitting. If you hold the head of the lock-on connector and apply too much torque to the barb fitting, the connector will break.
  4. Slide this assembly onto the end of the tubing.

Your Vacuum Press System is Ready to Use. Now What?
I've written this short but helpful article that explains what else you will need to begin using your vacuum press. The article also includes a step by step guide to using your system for veneering.

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