martin_g

Hi All,

After struggling on my recent CLD-R with feedback nodes, I've decided to try using them in some projects. I've got stuck on my first trial however!

I've tried replacing a fairly common conditional incremental count within a For Loop, that I would usually do with a shift register, but I just can't get the correct result with a Feedback Node. Code is attached, is this a correct usage case for a Feedback node?

In the current configuration, when count value returned from the Shift Register is zero, the count returned from the same code using a Feedback node is 1. I've tried other configurations, but still get incorrect results.

Feedback Nodes.vi

So I went with an XY graph, formatted the digital waveform data into numeric, with each plot set to a different scale, to separate the digital signals.

Thanks!

Martin

Hi All,

I have an application that is tracing the mechanical and electrical parameters of a vehicle window switch.

We move the switch by rotating a cam x degrees one, then back the other way, a common motion range would be +/- 20 degrees. We're monitoring angular position, torque and electrical contacts.

I'd like to then plot a trace of torque vs angular position, to show where the detents in the switch are. I'd also like to use a digital waveform plot to show the state of the switch vs angular position (see attached image).

I can't figure out though how to display the digital data against a DBL value, it seems to me I can't use a digital waveform display, because I'd have to plot against either time, or a U32 integer.

I could use an XY graph, but I like the digital waveform feature of stacked plots for each waveform.

Any ideas how I could do this?

Thanks,

Martin

Hi,

Analog Devices produce a signal conditioning amp for J & K type thermocouples - AD594 I think.

You give a DC supply voltage and get a linear voltage out, it also does cold junction compensation, and costs about $10. Used them lots of times with basic USB Daq cards, they are great.

Martin