T-FLEX Parametric CAD. Fundamentals. 2D Design
T-FLEX Parametric CAD. Fundamentals. 2D Design T-FLEX Parametric CAD. Fundamentals. 2D Design
«Bottom-Up» Design In this case the value read from the fragment file will be put into. To change now the ball bearing diameter, it is necessary to download its file as a separate drawing, specify the desired diameter value in that file, and after saving the file return to the assembly drawing. This scheme is used in practice rarely, when it is required to modify the assembly drawing by changing the values of the variables in the fragment file. For filling in unspecified values of the variables automatically, in the System options a special parameter «Substitute variable values» is turned on by default. In this case, upon inserting the fragment, all variables automatically get constant value read from the fragment. Working with user-defined dialog User-defined dialog with control elements represents itself a more visual tool for working with external variables of the fragment. The set of different control elements allows specifying the values for the variables with the help of various toggles, buttons and also by entering the values from the keyboard or working with the list of values. There are two regimes in which the dialog fields for the value entry can operate. Either the value of the variables or the expressions themselves can be displayed in the fields of the dialog. In the latter case, the values of the expressions are shown to the right of the entry field. The second regime works in case the parameter «Show expressions» has been set on in the properties of the entry field. Details of creating user-defined dialogs are described in the chapter “Control Elements. Creating User Defined Dialog Boxes”. In any case, a user can write both values and expressions into the entry fields. After finishing the data entry (when the focus of input is shifted to another field), the fragment external variable which is related to the given entry field will be set equal to the expression. To define a relation between a fragment external variable and an assembly variable, you can use the context menu commands. You can call the context menu command “Insert Variable” or, instead, simply press . The standard “Insert Variable” dialog box will be displayed in the screen. Upon selecting an assembly variable, its value will be assigned to the fragment external variable. A checkmark before the respective command of the context menu will be indicating that the current fragment variable has a relation with an assembly variable. Direct editing of the dialog entries will be modifying the respective assembly variable values. To cancel such a relation, call the same context menu command again. When the connection with the variable is established, it is possible to continue working with the drop-down lists of the values. While doing it, the assembly variable connected to the given fragment variable will be assigned the new value from the drop down list. If necessary, it is possible to switch to the mode of working with the list of variables instead of working with the user-defined dialog. For switching to another regime, use the flag “List of Variables” found at the bottom of the dialog. For loading one of the saved configurations (predefined set of values for the fragment external variables), use the drop-down list «Configuration:» at the bottom of the user-defined dialog. 587
Fundamentals. Two-Dimensional Design 588 The command for working with the configuration can be invoked by the following means: Клавиатура Текстовое меню Пиктограмма “Parameters|Model Configurations…” Details of the work with the command “Model Configurations” can be found in the chapter “Auxiliary Tools for 3D Assemblies Modeling” of the book “Three-Dimensional Modeling”. Working with the connector Upon attaching the fragment (for example, a nut) to the connector of another fragment (for example, a bolt) the values of the variables can be obtained automatically. For successful automatic connection of the variables with the connector, the following conditions must be met: 1. In the connector the named values have to be specified. These named values will subsequently serve as a link between the variables of the fragment having a connector (bolt) and the variables of another fragment (nut) which will be attached to the given connector in the assembly. 2. For corresponding variable of the fragment the list of names for the values or at least one name of such sort must be specified for linking with the connector. The name of the value for the variable has to be specified in advance in the variables editor in the fragment file by modifying the properties of the variable. The name of the connector value specified for the variable must coincide with the name of the value specified in the connector. Only in this case the automatic connection is possible.
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<strong>Fundamentals</strong>. Two-Dimensional <strong>Design</strong><br />
588<br />
The command for working with the configuration can be invoked by the following means:<br />
Клавиатура Текстовое меню Пиктограмма<br />
“Parameters|Model Configurations…”<br />
Details of the work with the command “Model Configurations” can be found in the chapter “Auxiliary<br />
Tools for 3D Assemblies Modeling” of the book “Three-Dimensional Modeling”.<br />
Working with the connector<br />
Upon attaching the fragment (for example, a nut) to the connector of another fragment (for example, a bolt)<br />
the values of the variables can be obtained automatically. For successful automatic connection of the<br />
variables with the connector, the following conditions must be met:<br />
1. In the connector the named values have to be specified. These named values will subsequently serve as a<br />
link between the variables of the fragment having a connector (bolt) and the variables of another<br />
fragment (nut) which will be attached to the given connector in the assembly.<br />
2. For corresponding variable of the fragment the list of names for the values or at least one name of such<br />
sort must be specified for linking with the connector. The name of the value for the variable has to be<br />
specified in advance in the variables editor in the fragment file by modifying the properties of the<br />
variable. The name of the connector value specified for the variable must coincide with the name of the<br />
value specified in the connector. Only in this case the automatic connection is possible.
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