Waveform Chart does not draw correctly

[matthias.richwin]

Hi all,

I have a waveform chart (LV 7.0, XP Prof.) which is rather big for presentation purposes (almost fills 1280x1024 screen). Sometimes, the chart does not draw correctly on its canvas, i.e. parts of the graph appear only after I move another window across. In many cases, the lines are also not drawn as they should, bigger linewidths appear thin in some sections.

Any ideas? Seems to be some problem of LabView-Windows interaction...

Regards

M. Richwin

[Bush-Man]

Hi Mr. Richwin....

1. Can you tell us the CPU Usage when this VI is Running ? I think It's a bad loop timing... You Must enter a little wait at your loop.

2. Do you really need all that data at one shoot ?? Try to cut it to pieces or use Graph instead...

[matthias.richwin]

Hi bush-man,

CPU usage is around 10% all the time, sufficient waits are included in all loops.

Regards

M. Richwin

[Bush-Man]

Hi Matthias,

I'm Sorry, I don't have any ideas. I wrote a little VI using a Chart and a lot of data with 1024x768 resolution, and didn't have any problems.

I'm using LV 7.1 and Win XP Home Edition. My CPU usage was also 10%.

Sorry...

Bush-Man

[Soroush]

Can you tell us how you fill your chart? one point at e time or adding array of points at a time?

Have you tried "synchronous display" mode? (right click the chart>> advanced>> synchronous display) It may suite your needs although it is not recommended in most cases.

[altenbach]

Problems like this are sometimes caused by a buggy driver for the video card. What kind of video card do you have? Have you checked if updated drivers are available?

[matthias.richwin]

Hi all,

thanks for your help. Mysteriously enough, the problem has disappeared without me changing anything.

Regards

Matthias