Best Fit Bore Pattern Plots

[[To...]]

When I create a plot of my Best Fit Bore Pattern using Plane, Circle and Circle datum features, the location of the circles is included in the plot. Why? Is there a setting to display the plot correctly?
BFBP results.pdf

[[Br...]]

I think the purpose is for when you have a datum shift. Try turning on MMC for that Ø1.750 Datum B feature and it will show the MMB boundary around the feature in the plot and you will be able to see what direction the DRF shifted. I agree though, it sure would be nice to turn this off when the datum features apply at RMB. You can right click on the plot and deselect the features you don't want shown, but I don't know how to make that always be the case every time the report is generated.

[[An...]]

Well,im my opinion the display of the plot is well.
If you have a plane,circle,circle-DRF,all degrees of freedom are stopped.
The plot then shows a circle in the center,that indicates zero deviation in X and Y.
That's correct.
The plot then shows as circle on the right side,that indicates unequal zero deviation in X direction.
That's correct.
The distance between datum B and C is not according basic dimension.
For sure.
So the plot shows a deviation in +X.
All six bores deviate to the plus X direction,there is no Best-Fit-Operation!
That's correct.

So don't talk about "Best-Fit-Pattern".
This is a datum ABC-Pattern.

[[To...]]

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Position of 6 holes should not include info about the datum features. In the plot, it should not show the datum B feature as the lowest value and the datum C feature as the highest value. The plot should only show information about the 6 holes. Which of the 6 holes was the highest and which was the lowest. The plot should look like this....

[[An...]]

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Honestly Tom!

What should be the problem of having more data about the process?
Give the machinist the data he needs to improve the process.
Is this bad thinking?

Well, I am not really convinced about it.

[[To...]]

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More data is fine. Accurate information is a must. When asking for the position of 6 features, I don't feel we should add confusion by including High/Low info of the datum features. If I wanted to know about datum C, I would have plotted a graph for the position of C to AB.

[[Re...]]

Hi Tom,

if you put your datum features in a coordinatesystem the plot shows only the 6 holes you want.
If the datum features are defined in the bestfit it shows the datum features as well ....

[[To...]]

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Thank you for the information. However, this method requires manual edits to the evaluation and constraint settings, (i.e. Outer Tangential and ISO 5459) of the datum features in the alignment. I have my settings to do this automatically when I populate the datum features in the position characteristic.