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Problem with chart

I have strange problem with LabVIEW 8.0 Evalute edition chart.

Chart is in strip mode, displayain data from DAQmx Read, sampling rate is 1000 (so multiplier is set to 1/1000) , read samples rate is about 50 samples, everything is normal, but sometime the chart is not cleared regularly.. it is displaying 6 seconds of data, then is should clear itself automaticaly (strip mode)  and to display folloing data... and so on.. but SOMETIME without any rule, it does no clear itself but continuing to display data, one data over old, and after aother 6 seconds it clears it....

I repeat that THERE IS NO RULE in this behaviour so I am sure that there is no ERROR with my code...


When I want to display acquired and saved data on chart, I want to display it in same format 6 seconds of data at once (I have around 100seconds of data) , so I use chart with scroll bar, but there are some problems with display, display is not smooth, and jumps...

Is there any way to set-up scroll bar, some increment parameter ...
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You will probably get more useful replies if you post this question on the LABVIEW boards.

JR

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