Installed electric valve but it don't close

[Andrea Badiali]

Hi,
I follow the scheme to connect a air valve to RDC6442S controller.
So I connect the 24V DC NC valve to pin 5 and 6.
After I turn on the machine, the valve it's close (and this is ok).
After I start the engraving, the valve open itself (and also this is ok).
When the program that I launched end (or if I stop it mannually), the valve remain open (and this is not ok). So, the air continue to pass to the nozzle.

Can you help me?

By(t)e

[Pete Cyr]

5-6 -on CN-1.png

Was it pins 5 and 6 on terminal CN-1 or some other terminal.

[Andrea Badiali]

Pin 5 and 6 in CN1, I confirm.
The valve is this:
https://www.amazon.it/gp/product/B01054 ... UTF8&psc=1

Code: Select all

Voltage: 24V DC
Hose Size: 1/4 ''
Valve body: Brass
Seal material: NBR
Type: Normally Closed N / C
Mode: direct-drive
Protection class: IP65
Pressure range: 0-10 bar
Temperature range: -5 ° C ~ 80 ° C
Operating viscosity: Under 20CST
Not suitable for underwater use.
For use with piping in water, air and oil applications
Installation: The flow direction must follow the direction of the arrow.
Both cables can be used as

By(t)e

[sebastien laforet]

have you tried without connecting to the compressor or with lower pressure? maybe the pressure maintains the valve open because the spring/magnet is not powerful enough to close against the flow?

[Andrea Badiali]

have you tried without connecting to the compressor or with lower pressure? maybe the pressure maintains the valve open because the spring/magnet is not powerful enough to close against the flow?

Yes, I tried also without air, but the valve don't close.

So, I measured the volt on pin 5-6:
- before I start, the Volt is 0;
- after start engraving, the Volts are 19,8
- after the end of engraving, the Volts are 19,6.

Without the valve, all seems ok: before the start the volt is 0, after the start go to 23,something and after the end drop again to 0.

By(t)e

[Pete Cyr]

Try adding a layer - the last layer that is set to:
Is Output No
if Blowing No

perhaps the system is remembering the last command sent to the valve

[Andrea Badiali]

Try adding a layer - the last layer that is set to:
Is Output No
if Blowing No

perhaps the system is remembering the last command sent to the valve

I tried, but anything changes.
Also if I add a second layer with output ON and blowing OFF, the blowing don't stop.

Please note this:

Without the valve, all seems ok: before the start the volt is 0, after the start go to 23,something and after the end drop again to 0.

I didn't use a diode between positive and negative of valve, I must insert that?

By(t)e

[Pete Cyr]

I assume the valve is working the valve is working?

[Andrea Badiali]

I assume the valve is working the valve is working?

Yes, of course it works.

By(t)e

[Gene Uselman]

That is good... But that valve is for short duty- it should really be a motorized ball valve.