T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
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• Program. In this case, the appearance of the dialog box is defined by the external custom application;
• Pages. The user might have created a custom dialog box using interface elements (see the chapter
“Control Elements. Creating User Defined Dialog Boxes”). In such a case, calling the command “М:
Model Parameters” brings up this dialog box.
The command “M: Model Parameters” can be used for modeling the process of editing external variables
of the fragment in an assembly. One more possible way of using this command – when too many expressions
are specified in the current drawing. In this case it is possible to mark the variables on which the remaining
variables depend as external ones, and, if necessary, modify their values in the external variables editor.
Upon changing the values of the external variables with the help of the command “М: Model
parameters”, only constants can be used as admissible values of variables.
After completing the command, all variables are recalculated per the changes to the external variables, and
the drawing is regenerated with the new parameters.
Use of Variables in T-FLEX CAD
The variables and expressions created within the variable editor do not affect the drawing in any way per se.
The variable editor in itself is merely a powerful calculator. However, the variables can be used in T-FLEX
CAD system in many various ways.
Variables and Construction Lines
The main application for numerical variables is their use as construction line parameters.
A variable can be assigned as a parameter to a construction line in the following two ways:
When creating construction lines in the commands “L: Construct Line”, “C: Construct Circle” and
“EL: Construct Ellipse”. This can be done in the dialog of the properties window for the given
commands or in the dialog of the construction line parameters, called with the help of the option .
When editing construction lines in the command “EC: Edit Construction”. To do that, it is necessary to
choose a line in the edit command. After that, it is possible to specify the variable as a line parameter in
the dialog of the properties window or in the dialog of the line parameters, called with the help of the
option .
Your actions for defining a construction line parameter via a variable
are the same in both cases. Therefore, consider only the example of
editing construction lines.
In this example, the left and bottom lines are constructed as vertical
and horizontal respectively. The right and top lines are constructed as
parallel, accordingly.
Save this drawing with a certain name, say, TEST, as it will be further used for describing variable
uses.