Calypso evaluation of Profiles, Help.

[[Si...]]

Hi,

So I have been needing to check a lot of Profiles lately and have noticed Calypso doesn't take to it very much.
Unless it is a Profile to itself ( Profile of Datum A) or a 3 Dimensional call out ( Profile of Surface to A I B I C ) it will not evaluate the features.

Example, Take a 4 "x 4" Square. with a 1" x 1" smaller square in the middle.
One call out would be Profile of Surface to I C I A-B I

Surface would be the face of one side on the 1x1" square, Datum C would be the Bottom of the 4x4 " Square, Datum A and B are on the side of the 4" square but on the same plane. ( 2 separate planes) as the Square has a recess to give it a U shaped look.

The Surface call out and Datum's A and B are on the same side so think parallelism.

That's as close to describing the part as I can get, but when I enter the characteristic it gives me .0010 out.. but does not seem right.

When I evaluate it I put in the Feature : Surface , the Datum C as 1st, A as 2nd and B as Tertiary.

If I put C in as 1st and then make A and B one plane which gives the evaluation of just 2 datum's, the Evaluation will not work (Purple Square, something's wrong)

Is there a specific way to look at Profiles with Calypso?

[[Ja...]]

Can you post a print or a sketch?

[[Si...]]

Will do. Ill sketch one.

[[Si...]]

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SKM_C30818112715230.pdf

[[Si...]]

Side View, I meant Front View.

[[De...]]

Call me crazy, but what is A-B supposed to be accomplishing in this callout?

From your drawing, it appears that the surface you are checking should be parallel to C and at a nominal distance to C.

Regardless the orientation of A-B, the orientation of the surface to C should not vary.

If A-B is parallel to the X axis or if A-B is parallel to the Y axis, the parallelism and distance between the surface and C remain unchanged, therefore A-B is seemingly extraneous.

If this is the case, then if you change your profile callout so it includes C in all three tiers I think you should get a result.

If instead, the surface is in fact not nominally parallel to C, or there are other faces that are also called out to C | A-B, then A-B has a valid reason for being there and you might try adding A-B in for a teriary datum to see if it will give a result that way.

[[Si...]]

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A-B Represents One Plane.... It is how the Engineer wants it. So instead of Profile to C I A I B , He just wants 2 Datum's. In this case A-B are combined to be that one datum... So Calypso is like.. Dude what are you smoking lol.

[[De...]]

Whether A-B is one plane or two makes no difference, the point is rotation around the Z axis and or location along the Y axis should have no impact on the profile result.

Imagine you lay this part on a surface plate sitting on the C Datum and put an indicator on the surface you are measuring it, if it is parallel your indicator stays at zero, now if you rotate it while keeping the indicator on the part, your result wont change.

This is what I meant when I said that A-B should not have any point in being in the callout unless I am missing something.

[[Si...]]

What does Outwards / Inwards to Infinity do? Never used those before.

[[An...]]

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CALYPSO needs a "Three Planes DRF":

First plane is C (X/Y)
Second plane is A-B (Y/Z)
Third plane is theoretical (Z/X)

The third plane is perpendicular to the first plane
and perpendicular to the second plane.

[[Si...]]

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Ok, That's what I have come to determine.
Now if a call out of a Profile to itself " I Profile I 0.10 I " I would just base the evaluation off the base alignment? Or would I put the Feature to itself all three times? That is the other hiccup I am encountering with Calypso when a Profile is to be itself (Flatness) but they do not want to see Flatness.