Read RPM using ni-usb 6009

[okky.septa.c]

Hi,

I have NI-USB 6009, optocoupler sensor and rotary encoder to read RPM. My question is How can I do this in labview to read RPM ?

if anyone can please help me out with this. if you have example, it's more better. because I'm beginner in labview.

regard

Okky

[PBP]

Check out this USB6009 + Encoder.

There are limitations though. You can not sense direction.

[okky.septa.c]

ok thank's. but I have a problem how to create the VI

regard

okky

[syrpimp]

hi okky.septa.c,

Check this .USB-6008 and USB-6009 RPM Reading with Counter (Frequency)

[okky.septa.c]

when I used this VI, the count is going up, up and up. I need when I stop, the RPM in zero condition.

so, do you have solution for me ?

[GerdW]

Hi okky,

read the manual of your USB6009: it clearly says the counter can only count-up!

But what is your problem anymway: to calc RPM you need to get differences of your counter…

I need when I stop, the RPM in zero condition.

So when you stop your VI the last RPM value should be zero? Even when the machine is still rotating? I don't get this…

Quick&dirty: write a zero to your RPM indicator when you stop the VI…

[Vishnuprashanth]

Hello,

I would like to know if NI USB 6009 needs an external power source for generating signals or is it good enough when connected to the PC ?

[GerdW]

Hi Vishnu,

you don't need an external power source…

[Vishnuprashanth]

Thanks for the quick reply.

I'm supposed to record pressures from 4  Pressure switches and 3 piston detectors as well as generate signals to stop the pump when the pressure exceeds the limit.

I have very basic knowledge about this. It would be great if you can offer some advice here.

Thank you

[Vishnuprashanth]

Here's the Testrig