T-FLEX Parametric CAD. Fundamentals. 2D Design

Geometric Dimensioning and Tolerancing Symbols. Datum symbols
A GD&T symbol with a leader can be attached to a dimension by again using the object snapping or the icon
in the automenu. In this case, the tolerance value can be calculated automatically (see “GD&T Symbol
parameters” below). See examples of attaching GD&T symbols with leaders on the diagrams below:
To move a GD&T symbol with a leader, right click over
the leader line and select the command “Edit” in the context
menu. The GD&T symbol will start rubberbanding. Move
the GD&T symbol around and fix the new position by
clicking . Selecting the context menu item “Parameters”
brings up the dialog box of the leader parameters. Here you
can define the arrow type, thickness and size, as well as the
parameters common across all system elements: Level,
Layer, Priority and Color.
To create an additional leader line, use the automenu icon
after calling the command “Create leader or GD&T
Symbol with leader” (the icon ). Upon pushing the icon, select the GD&T symbol to attach the leader
line to. One can create a leader line with jogs, the jog angle being 90°. The end of the leader line should be
attached to a graphic line or a construction line. The last stroke of the leader line is constructed in this case
orthogonal to the line to which it is attached.
The leader line originates in one of the characteristic points of the GD&T symbol . (2D nodes can be
created in those points if the option “Create Nodes on GD&T Symbol” is active, as defined in the
command “Customize|Options…”, the tab [Snap]). The characteristic point nearest to the pointer is
automatically selected when picking the GD&T symbol.
Creating Leader or Datum with Leader
To create a leader or a datum with a leader, use the automenu icon or type
the key . The creation and editing techniques of these elements are similar
to creating and editing of GD&T symbol with leaders. The datum leader has a
different ending tip (see the diagram on the right hand side).
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