DAQ device for linear encoder & labview 7.0

Ok, I am in a bit of a bind, so the quicker the response the better =). I currently have Labview 7.0, and am needing to read the pulses of a MicroE hi-res encoder. I know I am in need of a DAQ device, so I just want to know which one would be the best (cost-effective & easy to manipulate with Labview). Also, I need three analog inputs as well. Preferably the range of the analog inputs would be 0-10 volts (well, preferably 0-10mv, but that is unikely). I am very unfamiliar with programming Labview, but will learn what I need .
Thank you VERY much!

Hello heepofajeep,
I would highly recommend you go with an M-Series Mulitfunciton DAQ Device for this application. The two counter channels on these devices have expanded support for two phase relative linear and angular encoders, compared to older E Series devices. In addition, these devices are capable of performing analog input, analog output, and digital I/O operations. They contain a minimum of 16 analog input lines, with a programmable gain amplifier that will allow you to programmatically set the range anywhere as large as +/-10V to +/-0.1V in order to take full advantage of the resolution of the ADC on the device. These devices can be programmed in LabVIEW 7.0 or later with the NI-DAQmx driver, and there is the DAQ Assistant and many great example programs for getting up and running with your application quickly.
I hope this information helps and let us know if you have any further questions.
Regards,
Travis G.
Applications Engineering
National Instruments
www.ni.com/support
Message Edited by Travis G. on 08-18-2006 04:55 PM

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Hello,
The card does has some analog input and outputs. I would check the manual here: http://www.ni.com/pdf/manuals/370838b.pdf. The DAQmx API with a DAQ card is going to be much better than interfacing with a motion card, but you should be able to read off it at the least.
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Which usb DAQ device to buy ?

I am a total Noob when it comes to DAQ so please bear with me and help me with suggestiions on which NI USB DAQ to buy. I am biochemist and I have an old HPLC machine (basically a chemical purifying/seperation machine) I need to control by writing a labview program. I have labview 2013 and have some basic familiarity with it, and have used very easy VIs like blinking LEDs using arduino interface.
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Attachments:
shimadzu-lc-6a-hplc-pump-service-manual-eng.pdf ‏985 KB

I highly recommend you look up your local NI representative and have a nice sit down with them. They can go over your requirements and give you really good advice on which device to get.
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Best Regards
Naseeb
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Hi Nasib,
I just wanted to clarify a few more things. Can you answer the following questions?
What frequency are you trying to generate?
When there is no load connected do you see the desired frequency?
When the load is connected, does the frequency always change to the same value or does it fluctuate within a certain range? If it fluctuates, what is the range?
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Here is some information:
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Pin                   Signal
1                      +5 V                                                                Supply
2                      V Gnd              Analog ground             Output 2,5 V typical
3                      R1                    Analog voltage signal
4                      A2                   Analog voltage signal                2 Vss typical
5                      A1                   Analog voltage signal                2 Vss typical
6                      0V
Attachments:
44769_5.pdf ‏124 KB

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M_Series_Help.zip ‏1145 KB

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Oh, ist mein Englisch so schlecht
Dann formuliere ich meine Aufgabe einfach noch mal auf Deutsch um Missverstaendnisse auszuloeschen.
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Hello,
I like to get your suggestion in setting up the DAQ system. I am very beginner in this issue.
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SCXI 1142
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Ganchai.
Attachments:
XPM6_mini. pr. transducer.pdf ‏115 KB
linear-position-sensor.pdf ‏1683 KB

Hi Ganchai,
I would recommend the 1520 with a 1314 terminal block for connecting your pressure transducer and strain gauge. It is designed for excitation, bridge completion and has many other features to fit these applications. For your linear position sensor, try using the 1100 module with an additional precision shunt resistor. For example, our 1308 terminal block has built in 249Ohm shunt resistors for taking current inputs for your 1100. These connections should give you the readings you would like.
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How to simulate a DAQ device and use it for testing applications without hardware???

how do i simulate a DAQ device
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i need to simulate several Digital inputs and Outputs to test the software. currently i dont have the hardware and DAQ device here.
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Kudos always welcome for helpful posts
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Go to Solution.

Hi,
There is no option to simulate traditional device.You need hardware for that so i would suggest to simulate a PXI device which has similar configuration to PCI-6014 and to do a small modification to your application..

DAQ devices don't show up in LabVIEW Measurement IO after loading 2014 DS2, uninstalling 2014 DS2, and then reinstalling 2013 DS1.

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Hi All
I want to record the position(rotation) signal. If there are 1024 pulse per revolution, I want the position signal to increase linearly(1023,1024,1025......). Shall I use Linear encoder or Angular encoder (From DAQmx creat virtual channel).
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Thank you!
Solved!
Go to Solution.

Hi lvymerciqq,
For Devices without Counters:
Your module, the NI-9411 doesn't have any on board counters, so unfortunately you cannot use counter functions such as the Linear/Angular encoder DAQmx channel VIs. If you're using a Compact RIO, you can make use of Counters for the device via the use of Scan Mode (You can see this in the NI Example Finder). However, if you're using a Compact DAQ then there are no Counters to make use of so we'd have to implement our own methods in order to clock the signals. For now, I'd think that this application would be limited by being software driven (i.e. making the OS check that a rising edge has occured) however I'm going to do some research and see whether or not there are other possibilities that can be explored; however it won't consist of such a simple solution as just dropping down a single polymorphic VI.
For Devices with Counters:
You can configure a Counter task to count the number of rising edges recieved from the encoder; therefore this number will increment on every increased rotation of the encoder. You'll have to be careful with respect to this number rolling over, however. This is when you reach the maximum count of your counter task and then it resets back to 0; this changes from device to device as different counters have different resolutions.
Alex Thomas, University of Manchester School of EEE LabVIEW Ambassador (CLAD)

DAQ device for linear encoder & labview 7.0

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