Iam at my wit's end

[[SH...]]

I have no idea, how to measure this runout inside the red mark. Datums are casting surface and complicated datum target....

IMG_20210224_204347.jpg

[[Da...]]

What geometry are A1 to A3? Planes?

Almost certainly there is something wrong with this runout callout.

[[SH...]]

Three planes, one datum target on each plane.

[[Mi...]]

Radial runout, to two parallel planes? Definitely get in touch with the customer.

[[Er...]]

So datum targets for -A- and -B- are cast surfaces. Gee wiz. This is nuts.

Is there a hard fixture? It may give insight to what the customer wants.

From what i can see...
-A- would constrain YZ
-B- would constrain X and spatial
The Dim 30 hole from -A- constrains planar?

-A- would almost have to be made from 3 lines with the points recalled into a maximum inscribed circle.

Without a cross section of -B- it's hard to make out what it is.

Educated guess says this is a hub for a fan blade. Balance would be important.

Good luck.

[[Ja...]]

Use your |A| datum targets to create a theoretical plane and your |B| targets to create a circle. Level to |A| and originate from |B| (no planar / clocking.) Now, report your runout to that alignment. Runout, in this case, is controlling the orientation of the surface to |A|.

[[Ke...]]

Are you using the datum targets for your base alignment?
If so, you may want to use something that is more robust.

[[Te...]]

If the Datum Targets for -B- are holes (tough to see in the picture but makes sense for the callout), you measure the three diameters and create a circle from the three holes for Datum B (use recall).

If you are using any version of Calypso that is not 2020 you will have to Construct / Perpendicular and pick Datum B and then Datum A and use that to evaluate runout to A and B, because before 2020 only 1 datum feature is allowed for runout.