This NX drafting-related tutorial shows you how to improve the of reusability of the drawings. It means that minimum efforts are required after a model is updated.
If you take your time to make a parametric model for reuse, you also should consider spending some time for making responsive drawing.
NX drafting tips and tricks.
The recommendations I show here do not remove the necessity to check the drawing after an update is done. However, they can guarantee that dimensions would be always be correct and overall minimum adjustment is needed.
In case your model changes one of the main dimensions, your views could intersect with each other after update. Test the views with maximum and minimum size values (consider doing it when you start modeling, since update time is faster).
In case you require using View Break, define it from model elements (points, curves) and use an offset. Make sure the points are defined associatively.
NOTE: From my experience these happens with about 5% of dimensions, primarily on the complex assembly drawings. You may not need to follow these recommendations if you don't notice similar behavior. Please, add your comments if you can identify the reasons for dimensions losing associativity or have incorrect value.
I have noticed two major scenarios when above-mentioned problems appear. There are ways of putting these dimensions so that that value would always be correct (described in part 3)
Check carefully the following dimensions:
NOTE: These technique can only be used if there is a risk of a problem with dimension (described in part 2). Normally you create dimensions as shown in NX training. If the problem repeats frequently consider implementation of PMI in your department.
To make sure that value is always correct, you can take the dimension value directly from a sketch. To do so:
Second possibility is to connect the value of expression directly:
When you need creating a sketch-based view, you can also make it updatable.
Some drafting features (for example detailed views, view breaks, section lines) can be positioned with relations to view objects (curves, points) on a view. When you position the features in this manner, they will become associatively connected.
The use of above-mentioned techniques can reduce the time for adjusting a drawing to new dimensions, it can also reduce a possibility of making a mistake. However, it takes time to define all the relations.
Have you encountered problems with updatable drawings?
About the Author
Alexander Popkov is the NX CAD/CAM method professional, currently working in Industrial Machinery.
Along with Maxim Semenenko, he runs a blog dedicated to the medium and advanced NX CAD/CAM tips.