Sketch Activity 4 Questions

Based one the introduction to Sketch Activity 4, why is it best practice to fully constrain a sketch before creating a 3D model?

In activity 1, step 6d, you are placing the third point of the a 3 point arc. The directions warn about placing the third point directly in the center of the arch because it will create an automatic constraint. Why do we not want this constraint to be applied to the sketch?

In activity 1, step 7 you mirror the cutout of the top outlet over the center line to create a second cutout for an outlet. Based on the introduction paragraph of activity 2, why did we mirror the top cutout and not just create another one?

In activity 2, step 1, you add a concentric constraint to the arc's in the top outlet cutout. What does concentric mean?

In activity 2, step 2, you apply the vertical constraint to the center point of the arcs and the center point of the circle in the middle of the outlet. When you apply the constraint you are informed that the order in which you apply the constraint matters. Explain how the order in which you apply the constraint effects the sketch elements you are applying them too.

In activity 3, step 1, you are informed you can hide the constraint glyphs by unchecking an option in the sketch pallet. Why would you want to hide the glyphs?

Throughout this activity you apply several dimensions and constraints to the top outlet cutout. Why are those dimensions and constraints also effecting the bottom outlet cutout?

What happens to the sketch entities when a sketch is fully defined?

• They change from blue to black

• They become larger

• They disappear

• They turn into construction lines

Tags

Applying

To complete Sketch Activity 4 you went through a process to fully define the sketch. You started by drawing the basic shape with no constraints or dimensions. Then you added dimensions to make sure the sketch elements follow certain rules. Finally you added dimensions to make sure everything was the appropriate size. Why is fully defining a sketch using this process important? Explain what could go wrong if the order is changed.