Create a single circular plot with six different diameter values

[Tom Haggerty]

"but the main thing needed is that the region in between the zone 1 & 2 should be gradually rising from 10.000 to 10.050 towards the zone 2"

If you just draw six 60° arcs of different diameters, I don't think your result will be what you want.  I think you need to create a formula that will calculate the points at -- say -- every degree or maybe every 1/2 degree.  This formula should interpolate the value based on the two measurements.  Then store the results in a 2D array as X and Y and then plot the array.

Tom

[GerdW]

Hi pipl,

read the full thread and you get vis instead of C-code

But, as others said, it's not worth the work as long as your measurements differ only by <0.1% - it's not visible on screen...


Message Edited by GerdW on 12-07-2007 01:45 PM

[unclebump]

You want to have the display to show the ovality in it. See this pdf file for an idea.

http://www.mahr.com/scripts/relocateFile.php?ContentID=1325&NodeID=1386&FileID=1446&ContentDataID=16...

It is kind of a hole in the labview world. I don't see any kind of metrology displays/indicators. I think it will be kind of difficult with only six datapoints. Everything else will have to be interpolated between the six points.

[GerdW]

Hi pipl and unclebump,

a polar plot would fit here! But just 6 datapoints is too less to get nice curved plots...

[Ben]

Y'all are on the same page as I was walking!

Just do a spline fit using polar coordinates.

Although this is not quite on target for this Q but it is related, here is an example I worked up analyzing the surface of pipes using a 3-d graph.

But in my case, I had more than 6 data points to work with.

Ben

Message Edited by Ben on 12-07-2007 08:07 AM

[Ben]

Forgot to mention!

Top level VI in that zip is "Ben_Pipe12.vi".

And...

That example should not be concidered good syle (by any stretch of the imagination!).

Ben

Message Edited by Ben on 12-07-2007 08:22 AM

[Kevin_Price]

FWIW, I myself would approach this in a very different and rather simplistic manner.  Partly because I'm a rookie at picture controls and 3D graphs and arc-drawing, etc.  Partly because, as has been mentioned before, the diameter differences are likely to be extremely subtle, far too subtle to be easily observed by eye.

So I would just make an X -Y graph where the X axis goes from 0 to 360 and the Y axis just has a set of 6 discontinuous horizontal lines representing the diameter measurements in the 6 zones.   The graph's autoscaling will help to highlight the discrepancies among them.  Alternately, you could show the diameters as deviations from nominal.

Sure it ain't as pretty, but the same information content is on display.

-Kevin P.

[PIPL]

Thanks to all

Why I am taking these different values seriously is because, when it comes to a change of .01 in a product of size .1 it matters a lot, right.
ie, my point is that the change in diameter may look smaller but it really matters.