Incremental Encoder with 9411 Board
We are trying to use an incremental encoder with the 9411 board. The difference between the inputs A and Ā never goes negative. So, for example, the difference will vary between 3 and 18V. This is also...
View ArticleIssues with Counter on 9411
I am a new Labview user, so some of this is a little overwhelming. I am using a cDAQ-9188 with several modules but the one I have having issues with is the 9411 that is being used to measure the speed...
View ArticleCounting 3 pulse outputs on the 9178
Hello everyone, Please note that I am very new to Labview. My issue is related to measuring 3 independent pulse outputs. Currently I am using a 9178 chassis. Two pulse outputs are coming from Omega...
View Articleproblem with Counter
hiA signal gives a correct value, if the speed is under 20km/h. above, somethime not correct. is there a opportunity to don`t show the incorrect value? I mean only the max. value in time?
View ArticleDAQmx Counter Input Measure a single pulse's pulse width
Trying to measure a single pulse's pulse width. It appears that the DAQ only makes the measurement on the read command instead of after starting the task. I just get a timeout error. Is there any way...
View Articlestarting and stopping timer using external inputs interfaced with labview
hello,I have trouble finding how to start and stop the timer using external voltage or current pulse. we are interfacing a circuit to labview. so for that we need to count the time it takes between the...
View ArticleMeasuring time of arrival with simple circuitry
I am trying to measure time of arrival of a high speed object to then calulcate the velocity of the object.The kit I will be using is a cDAQ-9174 with which I will either use the NI9401 or the NI9223.I...
View ArticleHow can I adjust the threshold voltage of edge counting?
Hi all, I'm using PCI-6602 with BNC-2121 for photon counting purpose. I connect the input to PFI39 channel, nothing is connected to BNC-2121 terminal without this. After some test, it is clear that my...
View ArticleHow to count with PCI-6601 for short periods, quickly?
The application I have in mind is to count TTL pulses for short periods (~500 us) at a rate of ~2 kHz to use in an FFT. I haven't been able to find a way to code something like this... I've tried using...
View ArticleMeasure frequency of Z pulse of an accu coder shaft encoder to measure speed...
Hi, I would like to measure the speed of a engine which has an accu coder encoder hooked onto it. It provides 3 pulses A, B, and Z. I am using a 6034 E PXI card. I wanted to know if there are any...
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Falling edge events of counter output
Hello, Using labVIEW, I would like to capture the falling edge event of the output of a counter. Below is LV code that captures both rising and falling edge events of a particular counter, I would...
View ArticleI am trying to use both DaqMx and DaqMxBase on the same (Windows) PC
Context: I am seeking to build and test the EPICS driver for "National Instruments - Various DAQ cards" - see http://www.aps.anl.gov/epics/modules/manufacturer.php for Windows. This depends on...
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Some problems in using the NI-9411 & cRIO scan and quadrature mode to measure...
How to set therotary encodernumber of linesper revolution(Z),using theNI-9411incRIOscan andquadraturemode to measureangles.
View ArticleUse a DAQmx write to increment a counter
I have a program that is writing output waveforms which go to some actuators, then some strain cards that are being read (essentially command-response). The issue we have is that we are always reading...
View ArticleHow to change the data time stamp from hh:mm:ss:ms to hh:mm:ss?
Hello, I am new to labview. I have made a vi to record data after every 00:00:10 sec. However, my vi is recording data after every 00:00:10.9 sec. My vi is using the time from my desktop. Is there any...
View ArticleHow to deal with counter wrapping on negative (below zero)
I am using the DaqMX Angular position VI's to read quadrature encoders. I find thatthe encoders do not wrap "correctly" when going through zero, even when I use the Double rather than U32 data type...
View Articlevaried adc input to be displayed on a 7 segment display
Hi, I constructed an ADC (8bit) using LM339 and a variable resistor. I want to have a display on a 7segment using 7490ic and 7447ic by varying the variable resistor. Also, i would like to know or...
View ArticleCan DAQmxRegisterEveryNSamplesEvent function be used for the Counter Input...
Hi, All, I have an application to count the digitial pulse number. I want to know the time of the coming pulses which start from 1 and increased 4 later, like 1, 5, 9, 13..... The time interval between...
View ArticleSave time in a table
Hi people! I have a doubt and I think someone from here have the soluction. In the picture I add you can see a "result" , this is the time 00:00:00.000 and when the max value is less than 4,5 start...
View ArticlePCI 6602 two edge separation
Hi, I'm trying to trigger the counter card (PCI 6602) with start and stop signal and read back the total amount of rising edges occurring between start and stop triggering events. The start and stop...
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