T-FLEX Parametric CAD. Fundamentals. 2D Design

Geometric Dimensioning and Tolerancing Symbols. Datum symbols
Object snapping can be used for attaching GD&T symbols to such elements as construction lines (infinite
straight lines), graphic lines (line segments), 2D nodes, graphic entities belonging to 2D projections or 2D
fragments, joint points of graphic lines belonging to 2D projections or 2D fragments (a 2D node is
automatically created upon selecting a joint point). One can also read dimension values for automatic
tolerance calculation (see the section “GD&T Symbol parameters” below). Elements are pre-highlighted
upon the pointer approaching.
When attaching to a node, the position of the GD&T
symbol is fixed upon selecting the node with the
mouse or by typing the option .
When attaching to a construction line, upon selecting the line, the GD&T symbol starts rubberbanding along
the line. Move the pointer to the desired position and click once again to fix the GD&T symbol position
(see the diagrams below).
or L
When attaching to a graphic line, after selecting the line by the mouse or by the option , the GD&T
symbol also starts rubberbanding along the selected line. Move the pointer to the desired position and click
to fix the position of the GD&T symbol (see the diagrams below). The GD&T symbol may appear beyond
the bounds of the graphic line – on its extension.
or L
or N
To set a relation between the tolerance and a dimension for automatic tolerance
value adjustment, press the automenu icon or the key and select the
desired dimension.
Meanwhile, the GD&T symbol itself may be located at an arbitrary position.
The GD&T symbol can be attached to another GD&T symbol. Press the
automenu icon and select a GD&T symbol. The newly created GD&T
symbol will be positioned below the selected one. If the GD&T symbol type is the
same as the other one, then the type notation fields of both GD&T symbols are
merged.
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