Best way to measure distance between planes

[[An...]]

Hi!  Having a discussion about the appropriate way to measure the distance between planes. 

One party says to just pick the Z direction.  The other says  to use the cartesian distance.

The cartesian distance happens to match the supplier.

I don't fully understand how the distances are calculated in the the magic box that is calypso...

Any insight would be greatly appreciated!  🙂

[[Za...]]

Cartesian is almost always the correct answer with plane to plane distances. the important nuance here is if the two planes are differently sized, to select the smaller plane for feature1 and the larger plane for feature2. the evaluation is from the center of feature 1 perpendicular to feature 2. below is an illustration citing the reason for small feature as feature1.

[[An...]]

Thank you!

 

[[Ma...]]

We often use caliper distance to cover min-max.

Then cartesian distance is a good one. I would never use just XYZ from features - mostly it's one corner on planes or origin of cylinder.
If you have intersections or circles, then reporting XYZ is ok if it's according to drawing ( like from center of block and you would have to place theoretical feature into origin of that alignment )

[[Cl...]]

Keep in mind how each plane is being evaluated as well. Outer Tangential/Inner

Tangential/LSQ. Each giving you the min/max/average distance respectively.

[[Ed...]]

Hi, 

Look at this, this one is very helpful 🙂

LNL Distance.pdf

[[na...]]

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If you have features of size, you can use Two-point distance characteristic.

 

 

With this of course expect rolling eyeballs from people not knowing what to do with 2 results.

Edited 15 hours ago

[[Ow...]]

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Edgars Putelis,

them Lunch & Learn documents put together by Ryan Stauffer at J&H Machine Tools 20 years ago (2005) were instrumental in my beginning years of learning Calypso. So full of color, well defined arguments and boredom breaking cartoons. Ryan works for Zeiss now and last I heard he was helping/teaching training classes in Tennessee somewhere as part of the Zeiss academy.

https://portal.zeiss.com/iqr-academy/overview