Simplest way to dimensioning symmetrical features

[Joccob]

I'm trying to find a simple and effective way to dimensioning symmetrical features. There are many threads on this forum that are discussing about how to correctly dimensioning the symmetrical features. I definitely learned a lot from those.

However, in some cases the part has so many symmetrical features that it is just not effective to put datum reference for all of them. Especially among all the symmetrical features, maybe only one or two are critical. So I wonder is there a simple way to give general tolerance to non-critical symmetrical dimensions? It can be a note or a general profile tolerance in the title block or some thing else.

I attached a sample drawing that have four symmetrical features on the top. As you can see, it took a lot of space which in my opinion, is not worth it. Imagine if you have five, six or more. The whole drawing would be filled with duplicate datum reference frame...

 

[Belanger]

Perhaps a general-note feature control frame, with "marked X" under it. Then put an "X" next to those widths that will take on that position tolerance. Saves a little bit of space?

 

[drawoh]

Joccob,

Why can't you place basic dimensions, then control them with profile tolerances all around?

--
JHG

 

[Joccob]

Thanks drawoh!

Profile tolerance works, but then I need additional basic dimensions to the edges to fully define the true position (right?). I found it is a bit difficult to avoid dimension lines and extension lines crossing each other. Also, it does not show my design intent that all those features are symmetrical which sometimes can cause issues.

 

[Belanger]

Keep in mind that profile would force you to hold the size, form, orientation, and location to the same accuracy. And it won't allow for MMC (bonus tolerance).
If the intent is just location/symmetry, then position is the better symbol.

 

[Woosang]

Draw a vertical centerline which crosses all horizontal outlines, then it would make ZERO BASIC dimension between the center of datum feature and centers of considered features.