GD&T/calypso question

[[Lu...]]

Hello, I am working with a print and I have never seen this type of true position callout, It is using a common datum between two slots that are offset from each other, with mmc. I drew a quick drawing of what I am seeing to make it easier to explain. Do I create a symmetry plane between the 2 centers of the slots? If so, how do I apply MMC to it? Any help is appreciated, thank you

EDIT: just noticed i drew mmc for datum D, datum d does not have mmc that is my mistake

Edited 11 hours ago
wrong mmc

[[Jo...]]

I get what they are trying to do, I'm not 100% sure if it's legal haha. Each slot on its own is a feature of size so MMC could be applied. Technically, the A-B plane is not a FOS, so MMC should not be applicable. I'm about 90% sure on this, but someone may be able to confirm this. 

Either way, the software doesn't allow for it with a symmetry plane.

If you must have this, you may be able to add the bonus tolerance with PCM. If you right-click the true position tolerance box, you can add a formula to add the additional bonus.  

[[Ke...]]

The way I understand it, MMC is only applied to the feature being evaluated for position... Datums get MMB which allows the part to "float" and does not actually add to the applied position tolerances

[[Ma...]]

I would rather see 2xTP for side slots with primary being middle big hole than this.

I don't think there will be any way to get MMB on A-B.