control pump with labview

[kmarcella]

Hi,

I am new to Labview and still trying to figure out some of the techniques so please bear with me. I have two pumps (EagleDrive Micropumps) that are connected to a DAQ NI 9263 to read their voltage so that we can monitor the flow through the pumps. The tachometer out is a 0 to 5 VDC square wave. We want to be able to send a signal to the pumps to control the output voltage between 0-5 VDC through a Labview program. Is there any way to do this? And if so, what would be the best way to go about this? 

Thanks!

[RavensFan]

The NI-9263 has 4 analog outputs.  So YES, you can send an analog output using it.  Look in the Example Finder for DAQmx analog output signals.

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@kmarcella wrote:

I have two pumps (EagleDrive Micropumps) that are connected to a DAQ NI 9263 to read their voltage so that we can monitor the flow through the pumps. The tachometer out is a 0 to 5 VDC square wave.

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It doesn't have any analog inputs, so how can you be reading the tachometer volte from the pumps?   if you need to read the voltage from the tachometer, you will need another or a different device.

[kmarcella]

Nevermind I figured it out!

[kmarcella]

After playing around with the program, I believe I am able to control the pumps with the attached VI. We have not hooked up the pumps yet, just have been using a multimeter to be safe. The VI is running well but when it is stopped, the multimeter reads the last voltage that was set by the VI. Does this mean that the pumps will keep running when the VI stops? And if so, how could I set the VI back to zero when it stops?

[erknoebe]

You can change your condition on the while loop to a control and before you press stop change the output to zero.

[kmarcella]

Hi,

Now that we have the pumps up and running and on seperate controls, we also want the option to use a single control for both pumps so they are running at the same speed. Is that as simple as creating a case structure and connecting the two pumps to one control? Or is there a better way to go about this? 

Thanks!

[RavensFan]

Sure. Split the wire from a single control.

[Rishi064]

I need to control my two piezoelectric micro pumps one is for push and another one is for pull operation. 

And I am a beginner in the lab view. how can I start?

[RavensFan]

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@Rishi064 wrote:

I need to control my two piezoelectric micro pumps one is for push and another one is for pull operation. 

And I am a beginner in the LabVIEW. how can I start?

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I would recommend looking at the online LabVIEW tutorials
LabVIEW Introduction Course - Three Hours
Learn LabVIEW