how to activate a valve with a switch ?

[sunil212]

I am going to work on the automation of a miniature punch press using compressed air and also a pneumatic valve, I was wondering how I would be able to activate this mechanism with a switch?

Also, what would be the best method to activate this set up ?

[Brian_R]

Can you provide more information about the valve itself?  For example, is it expecting an analog signal or a digital signal?  If this is an analog setup, the valve would probably expect a DC value that represents a certain pressure.  You would need a variable voltage source (a DAQ card for example) to provide the appropriate signal to the valve.  A switch would most likely not be necessary.  If the valve is expecting a digital signal, then you will need a DC power supply set to the digital high voltage (5V for example) and then use the switch to regulate the state of signal.

[Daddy-O]

If you can choose your own valves, I would go with a 4-20mA controller. It very inexpensive for the HW from NI, and it works like a champ. If you already have your valve, most companies offer the 4-20mA option on controllers, it is very versatile, fast, and VERY accurate with settings.