T-FLEX Parametric CAD. Fundamentals. 2D Design

Geometric Dimensioning and Tolerancing Symbols. Datum symbols
To modify GD&T symbol position or attachment, upon selecting the GD&T symbol click on another
element for attachment, if the object snapping mode is on, or enter the same commands as at GD&T symbol
creation, by typing on the keyboard. Such elements can be a construction line (the option ), a graphic
line (the option ), a node (the option ) or a dimension (the option ). These steps are similar to
those in GD&T symbol creation. An example of modifying a GD&T symbol attachment and position is
illustrated by the diagrams below.
All attachments (including relations with dimensions) can be canceled by pressing the automenu icon or
typing the key . After that, you can position the GD&T symbol in the absolute coordinates. To do this,
move the pointer to the desired position and click .
Let's review details of editing a GD&T (a datum) symbol with a leader. One can create two seemingly
identical elements – GD&T symbols with leaders. However, in one case, the GD&T symbol could be created
first (for example, in the absolute coordinates), with the leader attached to it later. In the other case, the
GD&T symbol could be created by using the command “Create leader or GD&T Symbol with leader”
that creates the leader first, and then automatically attaches the GD&T symbol to the leader. To modify the
position of a GD&T symbol with a leader, call the command “EFO: Edit GD&T Symbols”, and then
select the primary element. In the first case, it would be the GD&T symbol, while in the second – the leader
line. Once selected, the item starts rubberbanding. To fix the new GD&T symbol position, click .
The option allows modifying the parameters of the selected GD&T
symbol. Modifying the parameters in the case of a single selected element is
similar to original defining of the GD&T symbol parameters.
In the case of multiple selections, calling the option brings up the dialog
box “Change parameters”. In this dialog box, you need to specify the
parameters that you want to edit. By default, all parameters of the selected
elements are subject to editing. If a parameter is not supposed to be modified,
clear the respective checkmark. Upon specifying the parameters to be edited
and pressing [OK], you access the standard dialog box for defining the
GD&T symbol parameters. The only parameters accessible for editing are
those that were check marked.
The option allows setting the relation between the selected GD&T symbol and the desired drawing
dimension. To delete the selected GD&T symbol, press the key . To select and modify parameters of
a group of GD&T symbols, use the same techniques as for other elements.
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