Drawing: Zero Dimension Showing Non-Zero 1

[bblankst]

I have an assembly with two components. Each component has a datum plane which I'm using to assemble (mate: coincident), so the component faces are flush against each other.

Now I'm working on the drawing for the assembly and I'm trying to add a dimension and tolerance for the gap between the parts. I've tried several different combinations of the datum planes, component faces, and points created on the faces, but I just can't get the dimension to appear as "0"; it is always "0.00000002" and I can't figure out why.

If I try to reduce the decimal places in the dimension to two, ProE sets it back to eight when I close the properties dialog.

If I change the mate from coincident to an offset of either 0.00000002 or -0.00000002, the dimension changes to 0.00000004.

I'd really like for the dimension to simply read 0 (or even 0.00). Any ideas?

 

[aafuni]

What do you have the tolerance decimal places set to? I have had issues where if I have a tolerance accidentally set to +-.0005 it will change the dimension to 4 pl rather than 3.

 

[bblankst]

The change is happening regardless of whether I have the tolerance turned on. It's an asymmetric tolerance +0.75/-0.00. But even if the tolerances had eight decimal places, shouldn't the nominal then be 0 or 0.00000000?

 

[looslib]

What is your drafting standard set to? ASME Y14.5 says it should be a 0.

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[dgallup]

You can mate offset with a value of zero. Then show the assembly dimension.

It sounds like you have some error in your model that you are getting a non-zero created dimension in your drawing.

 

[bblankst]

Thanks, everyone, for your feedback. dgallup's idea worked perfectly.