Question
Created vs shown dims
body{font-family: Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: #ffffff;color: black;}Ronnie,
While I agree that created dimensions have their place, I also feel they should be used sparingly, and some of your examples show why.
CORRECTLY placed created dims represent 100% size of the model. This is easy for a machined part, but if you have draft, or have features that are not orthogonal to the view, you can wind up with oddball dimensions that do not reflect the intended size and/or can be misinterpreted. This gets even worse when you are using surfacing where little is orthogonal to the view.
Companies where one person models and another does drafting is even more important to use shown dimensions, as you can quickly lose the design intent if the modeler viewed it one way and the drafter another.
Personally I use created either as a last resort, or when it would be too complex a change to go back and re-dimension a feature way back in the model tree. They do have their place and I do use them, just as little as possible.
Jeff
41. EXTERNAL: Dimensioning Drafts (Ronnie Shand)From: Ronnie Shand
Subject: EXTERNAL: Dimensioning DraftsI totally agree here with Robert.
Here is the definition of a created dimension:
Created dimensions are in no way fake dimensions.
Created dimensions represent 100% the size of model.
Created dimensions are the true value that Pro/E computes from the model been shown in a drawing view.
If the value in the model changes, the created dimension will also change and update in the drawing
Many times it is faster to create the dimension than to show it by find it in the model.
Some companies have designers model all the parts and then a complete different department makes the drawings.
Regards,
Ronnie A. Shand
Staff Mechanical Design Engineer
Lockheed Martin Mission Sensors & Training MST
100 East 17th Street
Riviera Beach, Florida 33404
-
Phone 561-471-4342
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While I agree that created dimensions have their place, I also feel they should be used sparingly, and some of your examples show why.
CORRECTLY placed created dims represent 100% size of the model. This is easy for a machined part, but if you have draft, or have features that are not orthogonal to the view, you can wind up with oddball dimensions that do not reflect the intended size and/or can be misinterpreted. This gets even worse when you are using surfacing where little is orthogonal to the view.
Companies where one person models and another does drafting is even more important to use shown dimensions, as you can quickly lose the design intent if the modeler viewed it one way and the drafter another.
Personally I use created either as a last resort, or when it would be too complex a change to go back and re-dimension a feature way back in the model tree. They do have their place and I do use them, just as little as possible.
Jeff
41. EXTERNAL: Dimensioning Drafts (Ronnie Shand)From: Ronnie Shand
Subject: EXTERNAL: Dimensioning DraftsI totally agree here with Robert.
Here is the definition of a created dimension:
Created dimensions are in no way fake dimensions.
Created dimensions represent 100% the size of model.
Created dimensions are the true value that Pro/E computes from the model been shown in a drawing view.
If the value in the model changes, the created dimension will also change and update in the drawing
Many times it is faster to create the dimension than to show it by find it in the model.
Some companies have designers model all the parts and then a complete different department makes the drawings.
Regards,
Ronnie A. Shand
Staff Mechanical Design Engineer
Lockheed Martin Mission Sensors & Training MST
100 East 17th Street
Riviera Beach, Florida 33404
-
Phone 561-471-4342
This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.