True position question

[[Ra...]]

Can someone help me understand true position results.

If I have a point and I check true position in the Y direction only.
Lets say true position is .30

That means it can be +.15 and -.15 from that point in the y direction.

The result value is represented how? .28 is on the north end and anything less than 15 is below the point?

[[To...]]

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The result will show as the deviation * 2 and will be a positive value.

[[Ra...]]

just came across the formula.
under-root ΔX2 + ΔY2 * 2.

How can i determine which way it is out though? There are no charts for true position in pi web results.

Thank you sir.

[[He...]]

You can turn on additional printout under "Resources", "Characteristic settings editor", that should give you the X,Y,Z.

[[Jo...]]

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As stated, Position reported is the deviation VALUE from the target calculated as stated.. What you want is Resources>
Characteristics settings editor> Additional printout. That will give the components of error in both axis.

If you need a visual representation, copy your characteristic and modify it as "Best fit of bore pattern" . Even if it is a singular position you can uncheck the translation and rotation option and get a graphic of location. You will need to select detailed report to view in PiWeb.

[[To...]]

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As Ryan Stauffer once said, “The benefit of using BFBP in order to plot your position results, even if you’re not using Best Fit, is worth the price of admission.”

[[Ri...]]

Starting with Calypso 2019, maybe 2018, True Position & Concentricity will provide a native XY plot in PiWeb for you.

If you are using Polar Coordinates you will have to use the BFBP Plot unfortunately. 🙁