2009

all sketch geometry. You can then delete unwanted dimensions instead of
selecting sketch geometry individually for automatic dimensioning.
■ If Auto Dimension does not dimension your sketch appropriately, you can
experiment with selecting some of the sketch geometry to control how
automatic dimensions are applied.
■ If you use automatic dimensions, you may find it easier to accept sketch
default dimension values, and then edit them with correct values in an
order (large to small) so you can control sketch behavior.
■ Use geometric constraints when possible. For example, place a
perpendicular constraint instead of using a dimension value of 90 degrees.
■ Place large dimensions before small ones.
■ Incorporate relationships between dimensions.
■ Consider both dimensional and geometric constraints to meet the overall
design intent.
Modifying Sketches
After you create sketch geometry, you can refine and adjust the proportions
of the sketch by applying dimensions or geometric constraints. You can also
drag any unconstrained or underconstrained geometry.
Patterning Sketches
You can use the Circular and Rectangular pattern tools on the Sketch toolbar
to create patterns of your original sketch. The pattern geometry is fully
constrained. These constraints are maintained as a group, If you remove the
pattern constraints, all constraints to the pattern geometry are deleted.
Workflow overview: Create a circular sketch pattern
1 Use sketch tools to create the geometry to include in the pattern.
2 Click the Circular Pattern tool on the Sketch toolbar, and then select the
sketch geometry to pattern.
3 On the Circular Pattern dialog box, click Axis, and then select the point,
vertex, or work axis to use as the pattern axis.
Modifying Sketches | 47