Hi,
I'm new to this, and would like to know if my approach sounds reasonable and perhaps have some guidance in the execution.
I want to build an application that will primarily allow me to plot wire-feed-speed measurements over time. The reason I say over time, is becuase I wish to additionally read AI signals from a motor controller containing motor speed and current. And "time" sounds like the obvious way to relate the measurements.
I am playing with a USB 6210 and have an encoder attached to a wheel in the wire-feed system. Using a counter input I can measure frequency and then calculate wire feed speed. I started with this example and it sort of works for me.
If I pull the wire for a second, the chart will start a display and continue charting long after the wire has physically stopped moving. This has to do with the wait block. If I reduce the wait time or simply remove it, the chart reflects more of what is physically happening. However, if the wire stops moving, the chart stops charting. This is where I get confused. I could essentially use this chart as is, but what if I want to read the AI data from the motor and compare it with the counter speed measurements. I would need them to be synchronised over a delta t wouldn't I? I have found other counter examples which read pulse width, frequency continuously and even synchronise with an AI, but I am missing the big picture with the timing.
Any clues?
Any other examples I should look at?
I'm also looking for some Labview beginner courses to expedite this process, only finding something hasn't been so easy.
Cheers,