T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
ELLIPSES
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Ellipses in T-FLEX CAD are constructed similar to circles - by defining their geometrical relations with
other construction entities. Examples of such relations are the ellipse center being snapped to a node,
tangency to a line, tangency to a circle, passing through a node, symmetry with another ellipse. Ellipses, like
other construction entities, are displayed in a thin dashed line.
Ellipses in T-FLEX CAD can be divided into two types:
- Ellipses whose size is defined by numerical parameters;
- Ellipses whose position and size are defined by geometrical relations.
Constructing Ellipses
To construct an ellipse, use the command “EL: Construct Ellipse”. The command can be called by one of
the following means:
Keyboard Textual Menu Icon
“Construct|Ellipse”
T-FLEX supports most common ellipse creation modes, that are:
- Constructing an ellipse with the center at a node;
- Constructing an ellipse passing through a node.
These modes correspond to the following options:
Select Node (for ellipse center).
Select Node (for ellipse to pass through).
Upon calling the command, one of the modes activates automatically, as indicated by the pushed icon in the
automenu.
Ellipses Construction Techniques
The following techniques can be used in the mode of constructing ellipses with the center at a node:
1. Center at node, through node, using parameter
This way of constructing an ellipse is realized in the following sequence of options:
or
This combination creates an ellipse with the center at a node, with the first semi-axis ending at a node, and
the second defined by a parameter. To create this type of ellipse, select the desired node. The node will
highlight and an ellipse begin rubberbanding with the center at the selected node. After that, select another
node for the ellipse’s first semi-axis to pass through. Then move the cursor over desired position and click
or use option.