True Position Projected

[[Me...]]

I am doing this correctly to print?

[[Ja...]]

Why are you measuring D as a circle and not a cylinder? Other than that it looks fine to me.

[[Me...]]

On the print -D- is outlined as special length of .500 from the -C- face. I'm measuring it as a circle do to how I fixture the part as well.

[[Me...]]

Why are you using a projected tolerance zone for Datum D? You need to measure the actual cylinder over the length noted, not a circle and project it. All that is doing is using the data from the circle and applying it at a different location based on your alignment, which doesn't represent the actual feature condition of Datum D.

[[Me...]]

If you look at the picture I posted I clearly am not projecting Datum D. Cylinder2 is what is being projected and measured correctly. I know that I should not use a circle for the datum but due to the small length of Datum -D- and the amount of area I have to measure due to my fixture, I am using a Circle instead of a Cylinder for Datum D.

I just need to know how to adjust that projected zone how the print asks, which is .190.

[[Br...]]

The FCF associated with balloon #8 is not a projected tolerance zone. There needs to be a projected tolerance zone modifier in the FCF in order to invoke this. The chain Line that the datum feature symbol [D] is attached to is stating that the Datum feature only exists in that area.( A datum target area with cross-hatchings would probably have been clearer for a cylindrical datum feature like this. ). So delete that Projected tolerance zone you made and just measure datum feature D as a cylinder at the depth specified.

[[Me...]]

Sorry guys but I posted the wrong revised print, the new revision doesn't have the bubble numbers and you're not seeing the "P" in the true position...SORRY

[[Br...]]

Ok then your reference length should be .19 and your offset should be 0. The projected tolerance zone starts at the top of the hole, and projects .19 above that. You want to see that yellow arrow reflect this. Any offset you put in will be applied past the "Datum C Plane1" feature.

[[Me...]]

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What about the option/drop down for "Reference length 1? Should that be blank or should I select Datum C because it is the primary datum?

[[Br...]]

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Whatever feature you select there, it will use start the projected zone from. If left blank, you will need to put some number into the "offset" box to get the tolerance zone above the hole.