Space Point Mode???

[[Lo...]]

Hello, 
I was wondering if there is tutorial about using space point on Calypso 2023. I am working on a part I am not having an issue other that my manager who knows nothing about Calypso or Zeiss but insistent on me using space points. I have never had to use them and don't really know what they are. I have tried looking at the Space Point Mode feature haven't gotten to far. 

Thanks,

Lou

[[Mi...]]

Space points are generally most useful for measuring GD&T profile without curve, it's one of the evaluation settings for the Point feature.

 

If you open Calypso help (Hit F1 while in Calypso)

 

Search for "Basics of the Point Feature" and you'll get a pretty good explanation of the different modes for the Point Feature.

 

Space points absolutely have use, but Plane Point is going to be the right one for a lot of situations.

 

 

[[Ri...]]

I don't really recommend space points unless you are specifically trying to measure say a thickness that is square to an axis. The vector comp will drive you insane. 

If you are doing Profile results with these points, use either Plane Point or CAD Face Point (if you have a CAD lol). If you are doing an RPS alignment, use Plane Point. If you are self-centering, use Mid-Point. For most other applications, you can most likely use Touch or Plane Point. 

[[Ma...]]

Just went through the Lvl ii training about a month ago, and they recommended space points for mostly everything when it comes to CAD programing. I have never had any Issues with the vectors so That's interesting to hear, however i don't do much free form surfaces, mostly basic geometry. 

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[[Ri...]]

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I want to make sure I'm clear that I'm talking about the evaluation method of the Point, not when you select "Define Space Point" on the CAD model.

 

There are no issues with the vectors. The issue that arises is the way the vector compensation is handled. It comps to the normal direction, so if you were say trying to measure a self-centering point from the X or Y direction to find where a groove is (so trying to find its Z) watch how it will physically find the point, but the Z results will comp back to nominal (it will show no deviation in the Z) - now switch the evaluation of that same point to touch or mid-point and see the true deviation. 

It's also not a good choice to use Space Point evaluation if you are knowingly going to flip/switch axis (telling the machine that the X direction is the Y direction, and vice versa). A case for doing this is that we have a certified step gage (similar to the gage Zeiss uses to calibrate the machine) that we use one program to measure in any and all axis. It uses a 3-2-1 style alignment. If you use Space Point as the evaluation you will see issues as soon as you perform a manual alignment. 

 

Once again, if you are performing straight forward measurements you probably won't see any issues, but once you deviate from that, you will see issues. 

[[Ky...]]

There is additional information on point evaluation in this knowledge base article:
https://portal.zeiss.com/knowledge-base?id=1007796

 

I'll be honest, space point is usually my default. Since it projects to the nominal point, it usually give me more relevant data for +/- material information, which is a little bit for useful for what I am doing when I am using single points for, but that's just my experience on the topic. I would be very careful about using net or touch points since they will always be in one of the alignment coordinate axes.