XY Graph saturation

Hi everyone,
I'm getting a X position over time and I want to plot the position during the acquisition (online). I use a shift register to keep in memory both time and position and then I use a the XY Graph. I have to display all the signals from the beginning to the end of the acquisition. Nevertheless, everything works the five first minutes and then there are increasing lags between the recorded position and the real position. It comes from the XY graph. How can I fix this problem?
I put a VI to show you an example with a sine over time.
Thanx for your help,
Andrew
Attachments:
plot_sine_over_time.vi ‏13 KB

Well, i believe that there is a misunderstanding now:
The shift register is an essential part for your application!
Point is that currently your data is growing unbounded which will eventually blow the computer resources (memory). The increasing slow-down is only a "symptom" which is connected to this issue.
There are, as usually in computer science, many different ways to approach this. The easiest is, however, to limit the amount of data in the first hand and either "reset" the data once that amount is reached or to keep "a circular buffer" which stores the last X seconds/minutes.....
The graph will only plot data you pass to it, so maybe you can reduce the data before plotting it as you will never paint something like 30,000 pixels in your graph to display all position/time-combinations you collect within 5 minutes.....
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

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