T-FLEX Parametric CAD. Fundamentals. 2D Design

Basic Fundamentals and Concepts of Working with Assemblies
1. Inserting the fragment with the help of fixing vector. The fixing vector represents itself a special
construction entity which serves as a two-dimensional coordinate system. When inserting the fragment
into the assembly drawing, a user specifies location of the fixing vector, and the fragment image,
connected to the fixing vector, is transferred along with that. The fixing vector is defined in advance in
the fragment document (for more detailed description see the chapter «Bottom-Up» Design»).
2. Inserting the fragment by fixing points. The fixing point represents itself an intersection of the
horizontal and vertical construction lines the coordinates of which are specified by a pair of variables
with special names x1…x9 and y1…y9. Accordingly, the number of fixing points can vary from 1 to 9.
The entire parametric drawing of the fragment is constructed on the basis of the base construction lines
determining the fixing points. When inserting such fragment, a user indicates a new location, and the
parametric drawing of the fragment gets reconstructed depending on the new location of the base
construction lines. This method is used when the fragment image (linear dimensions, shape, topology,
etc.) has to be modified depending on the placement in the assembly drawing when position of the base
fixing points is changed. For more detailed description see the chapter «Bottom-Up» Design».
3. Associative/Non-associative fixing to elements of the assembly drawing. While designing by «Topdown»
approach, upon creating a fragment in the assembly context drawing, a user can perform
associative and non-associative fixing of the elements of the fragment to the elements of the assembly
drawing (for more detailed description see the chapter «Top-Down» Design»).
4. Without fixing (inserting «as it is», in absolute coordinates). When the fixing vector and the fixing
points are absent while working with the «Bottom-Up» approach, and also, when all snaps are turned off
while working with the «Top-Down» approach, the system puts the image of the drawing on the page of
the assembly drawing without any changes. Each line or node of the fragment gets the same coordinates
in the assembly drawing as the coordinates it had in the fragment document.
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