In this part file tolerance also given. I wish to know whether it is a common occurrence.
Where I work, it is highly encouraged to add tolerance to sketches. Especially true if the designer is not going to detail the part. And in future preparation to go drawingless. Unfortunately, not all designers follow this due to unmentionable reasons.
Is this required for model based definition? So that there's no drawing, tolerances needs to be put in part?
I do not have MBD application. I wish to know whether tolerance that put for MBD will be shown even if there is no MBD application.
Solid Air wrote:Especially true if the designer is not going to detail the part.
Solid Air wrote:
Especially true if the designer is not going to detail the part.
What is meant by detail the part?
Detail is a term that means to make a drawing of a part.
Is this done after part is finished or template is like that from start? This is confusing to work with
As this is a downloaded file I have no idea whether it is done before or after sketch is completed.
It is probably a combination of both. Unless you are doing conceptual design, where nominal dimensions may be used, if I am designing, for example, a housing for a bearing, I will look up what bore tolerance the manufacturer recommends for my application. Where I work, we add the maximum and minimum bore diameter and divide by 2 and apply a plus or minus tolerance. So I model the bore at the average bore diameter and show my +/- tolerance in the model. Why? Because I do not want to have to look it back up later. Also if I get pulled off the project, the person that takes over for me knows what tolerance I was using. Also, as I stated earlier, the person that creates the drawing for me does not have to contact me for the tolerance (this is where I like to import model dimensions into the drawing so if I change my mind when I check the drawing, I change it in the drawing and it changes in the model too! And yes, dimensions and tolerances can be used with MBD (at least it could a couple years ago).
I understand that the model you downloaded looks cluttered because it contains both inch and metric dimensions. However, for me, I have found that the more I work with these types of models, the less they bother me.
I would say it's pretty common (or at least, should be).
With the tolerances on the sketch dimensions, when you go to create the drawing and use Insert Model Items for the dimensions, the tolerances are already present.
Similarly, if initially modelled without tolerances, then the drawing is created using Model Item dimensions, when the drawing is toleranced then these will be back populated to the model.
If you're not creating drawings using the Insert Model Items command for dimensions you're wasting a LOT of time.
Problem is if you want to give tolerance while sketching it is a multitasking.
If you are working for yourself, then sketch how you want to sketch. If you are working for someone else, find out what their best practice is.
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