Dust Collection automation

Hello.

I am looking for some help in finding an alternative to a simple on/off relay. Attached in a picture of an Automatic dust collection system that was found in the July/August Find Woodworking Magazine. Credit to the Author as is a very good system. However, I would like to add a delay on/off relay to the system to allow the ability to reduce load on the circuit and allow the dust collector to run a few seconds after the table saw or other large tool is turned off. I have looked at time delay relays but my novice electronic experience just will not let me comprehend the necessary equipment and wiring diagrams needed. Any Ideas would greatly appreciate.

What you are looking for is a "delay-on-make" timer to be placed between the current sense relay and the relay for the dust collection motor.

I built one many years ago, with a 2 second delay on starting the vacuum, and also a 10 second delay on stopping the vacuum after I stopped the table saw. It was home built circuitry. If you can afford the costs, go with the commercial timers.

Ken

Woody,

Per your PM request: This is what I had in mind for delay-on-make and delay-on-make/delay-on-break with commercial modules http://www.ssac.com/Express/ExpressCatalog.pdf

Ken