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Caliper vs X/Y/Z distance


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There is a .004'' discrepancy from caliper x distance vs just x callout. Caliper is using base alignment from plane(plane is use for planer rotation and zero on x) to hole x distance callout. I'm assuming just x call out of hole is also using base alignment so why the discrepancy?

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Check the caliper distance evaluation. It could be set to Maximum or Minimum.

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Posted (edited)

I have and they are evaluated at center. I found the .004'' difference.

X callout is center of base alignment to hole whereas caliper distance is center of plane B to hole.

 

 

base.PNG

align.PNG

x callout.PNG

caliper.PNG

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 Sorry, but you have a mistake there.

If you want to have same result you have to use that Base-Plane -B- as rotation in space or at least as planar rotation and as X origin.

Value on X,Y,Z is from origin of feature - for plane it's one of corner.
Using caliper distance and "Center" is from center of feature, so if that -B- plane is not perpendicular to plane -A- and -C- then there will be always something.

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I almost wish they would just disable the output or make some warning (like the annoying one when you switch to a UPR pre-filter) when trying to tolerance an axis (X, Y, Z) from a 3d feature. 

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I know I'm showing my age but I seem to recall there was an option in the plane window to select the mid-point of the plane.

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Out of curiosity I've opened a plane feature, but I don't see such an option.

Tom, you don't look a day over 30. I'll be 63 in August. I'm probably the oldest dude in the forum.

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Thanks...LOL Oldest?  not even close dude.   I was referring to versions of Calypso in use around 15 to 20 years ago

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Nah, I'm 66 and retiring very soon. Anybody older than that?

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Either you recall "Plane" to a "Point" feature or edit a "Plane" element in Characteristics tab where you can select which point of a plane will be evaluated.

image.thumb.png.8af56a402dada2d34b6fb65dc892ebdc.png

image.png.0c01f2ce24d9430be261723ce1a1afc1.png

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I will just add, that result may vary, because of measured points. So it's the same as using point with recall measured points.

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Good job Mateusz....  I never noticed that before.  Does anyone remember this option being located in the feature, i.e. back in the 2000's?  Or, is my brain starting to fade?...lol

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