Hello again, Still struggling with DAQmx acquisition. I was playing around with using digital inputs to start and stop the acquisition, as well as flag certain points within it. Non-stop errors around how I am reading/buffering the data. Still need to get my head around exactly what's happening there. It would be great if the function help was more explicit. Anyway… I’ve whittled it down to what seems very simple. There are two digital inputs: Weld Cycle Start, and Part Contact. I am using the first as a start trigger, and the second as a reference trigger to aquire 4.5s of data after contact, and 0.5s before. I want to create a new file and log this data directly to it. Don’t care about reading or displaying – we can do that later – just need to capture it on the hard drive. My specific questions to the group are: Should this work as is? Could it be better? What’s the most efficient way to repeat this every 15 seconds? I was thinking of making it a sub vi within my operator interface vi and calling it on initialize, waiting until it was complete, then calling it again. Alternatively, I could put part of the acquisition inside of a loop, but that’s where I get really confused… What should the loop contain? Learning hurts, but giving up is not optional… Thanks in advance for your help!!! Kudos will go to the solution, I promise!

This works. Thanks to all who tried to assist -- but no Kudos this time 🙂

LabVIEW

Solved!

Author

Just a note: I took out the reference trigger -- still waiting for a part to make that work. Will add that back in later...

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