Constraints > Fixed Length

Command call:

The constraint can be applied to straight line segments and arcs. Allows to keep the length of the segment or arc, when editing a parametric sketch.

It is possible to select several lines, while in the mode of selecting objects of constraints. Number of created separate constraints of fixed length will be equal to number of the selected lines.

 

Icon of constraint is displayed near midpoint of constrained object.

Example

Arc Length Fixation

An arc is created by two points and a radius. Fix its length by the Fixed length constraint. Select this constraint in the Ribbon, with the help of select an arc, create a constraint using or <Ctrl>+<Enter>. Next to the arc, an icon appeared indicating the fixed length constraint.

To make it easier to edit the radius and position of the arc, we fix the starting point of the arc. To do this, select the Fix constraint and specify the point. Now edit the arc. With the help of choose an arc, then a point . Now the end point of the arc follows the cursor. The length of the arc cannot change, the starting point remains fixed. Only the radius of the arc and its rotation relative to the first point changes.