T-FLEX Parametric CAD. Fundamentals. 2D Design

«Bottom-Up» Design
It is possible to define an unlimited number of transformations successively. All specified transformations
are put into the properties window. The transformations of similar type (for example, several translations
along the same axis) are automatically summed up.
When attaching the fragment to the connectors, the requirement of defining additional transformations can be
brought into the fragment file already at the connector creation stage. In this case right away after the
connector selection (when attaching another fragment) and reading the values of the variables, the system
will automatically turn to specifying the required additional transformation. This approach is frequently used
in the libraries of the standard elements since it is not always possible to automatically determine the location
of the future fragment. For example, when putting a nut on a bolt, it is almost always necessary to place this
nut on the surface being fastened, the attachment to which is specified by a user while defining additional
transformations.
Fragment placement using fixing points
If the fragment drawing contains external variables “x1”, “y1”, “x2”, “y2”, etc., then upon inserting the
fragment into the assembly drawing you will have to specify as many placement points as you have pairs “x”
and “y” with the respective numbers in the fragment drawing.
For example, suppose we want to locate the image of
the transistor, the drawing of which has three fixing
points. Each point specifies location of one transistor
contact. When inserting the fragment on the assembly
drawing, the system will successively prompt a user
to specify location of each point.
When specifying the fragment fixing points, the
current fixing point number will be drawn next to the
cursor.
The dynamic image following the cursor helps to
evaluate the appearance of the future fragment. If
necessary (in case of complicated for dynamic
imaging fragments) the dynamic image can be
switched off with the help of the option .
There are two possibilities for specifying locations of
the fixing points: attach the fixing point in absolute
coordinates (independent of the assembly drawing) or snap to the node on the assembly drawing. Attachment
in absolute coordinates is carried out by pressing while the object snaps are turned off or by pressing
simultaneously the key . Snapping to a node is done via with simultaneous node selection or with
the help of the option .
Repetitive Fragment Insertion
Several options are provided in the fragment creation command “FR: Create Fragment” for repetitive
insertion or duplicating fragments. Use of these options speeds up insertion of identical fragments.
Multiple insertions of the last created fragment are supported by the option:
Repeat previous Fragment
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