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If I make a feature, say a ,1875in cube. and I "show dimensions" and because of manufacturing considerations I decide to change that .1875 to two a place decimal. Now my "nominal" dimension IN THE MODEL is .19. What possible use is this? Pro-E has more poorly thought out practices than any software I have ever encountered. I suppose the answer is to NEVER "show dimensions" Which is how PTC will tell you it should be done. This is just ONE of many examples of how Pro-E fails to meet expectations. How about that hole wizard!
What a P.O.S.
Um, the alternative is that you change the dimension to two places, it gets rounded off to .19 on the drawing, and the value of the dimension in the model is still .1875? So now you have a model and a drawing that don't match. Is that what you want? Which one is the "real" dimension? What do you tell your machinist who comes to you complaining that the model and drawing are different?
This isn't exactly the case. Rounding only brings the answer to the closest division you specify. Lets say to 1/100th (or two decimal places). Yes, the model and the drawing would be "different," but you are rounding within tolerances. It is illogical to specify a tolerance that is less than half of the resolution of what you are using to measure. ie: specifying a tolerance of +/- 0.0025 when the dimension is in terms of 0.00 as a number does not make sense.
I guess my point is that I can NEVER use "show dimensions" which is THE only fast way that I can populate the drawing quickly with dimensions. You can't see a problem with my designing a feature to be 5/32 long and wanting to indicate a two place decimal on the document I describe the part to a machinist.I donot want the damn thing to CHANGE my model from .15625 to.16. I'm notwanting to changethe nominal that I designed the feature. I just want the machinist to bid me a two place decimal instead of the accuracy the is associated with a five place decimal. If my machinist is using the model to create the part. I wantthe modelto BE 5/32 (.15625) and not .16.
Let's take it to an extreme, if I build a feature that is 1.625 and I round it to no decimals I'll have a two inch feature. You can't see a potential problem here that is completly avoidable?
Why round off a decimal in a model. That should ALWAYS have the highest accuacy that I MODEL it with regaurdless of what the drawing says.
Again, I ask; What possible use is this?
If I make a feature, say a ,1875in cube. and I "show dimensions" and because of manufacturing considerations I decide to change that .1875 to two a place decimal. Now my "nominal" dimension IN THE MODEL is .19. What possible use is this? Pro-E has more poorly thought out practices than any software I have ever encountered. I suppose the answer is to NEVER "show dimensions" Which is how PTC will tell you it should be done. This is just ONE of many examples of how Pro-E fails to meet expectations. How about that hole wizard!
What a P.O.S.
To answer your original post, i think it is possible to do what you describe, that is, round a driven dimension without actually changing its value. There is a config option default_dec_places, but it only works for newly created dimensions. Set this option to 2 places. Make your simple cube to your .1875" size, create a new drawing & show your annotation, they will display as .19, but will not have altered your nominal size of .1875
Hope this helps
John
6 years too late.
What can i say, i have been busy