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## Constraints |

In the Part-Editor, use the commands in the:

•Geometry menu and toolbar : to add sketch-elements. The toolbar is to the left of the graphic-area.

•Constraints menu and toolbar : to add Constraints to

oa sketch-element, and also

oits start-Point, its end-Point, and a center-Point.

To add a Constraint if very easy.

To DELETE a Constraint, you must first show the Constraint in the Selection-Window.

1.SHIFT+CLICK a sketch-element,

or,

1.SHIFT-Click the start-Point, its end-Point, or center-Point of a sketch-element if the constraint was applied to a Point.

The sketch-element and its Constraints show in the Selection-Window.

2.Right-click the Constraint in the Selection-Window

In the contextual-menu:

3.Click Delete

In the Part-Editor, the Constraints toolbar is to the RIGHT of the graphic-area.

MERGE-POINTS : Deletes a Point. You cannot remove a 'Merged Point'. •Use Merge-Points to join sketch-elements end-to-end, and to remove one of the Points. •Use Merge-Points to make a sketch-path. COINCIDENT Points : Does not delete a Point. You can delete a Coincident-Constraint later and move the Points apart again. •Use a Coincident-Constraint to move together two Points, or a Point to a Line, or a Point to an Arc or Circle. •Use Coincident-Constraints for construction geometry. |

You cannot over-constrain a sketch-element in the Part-Editor (SolidWorks allows you to over-constrain, but you are given a warning). For example: A Point has 2 degrees-of-freedom (DOF). It you add a 'coincident constraint' between a Point and a Line, you remove 1 DOF, and 1 DOF remains. The Point can slide along the Line. You cannot then add a new constraint between the same Point and a Point at one end of the Line. A constraint between a Point and a Point would remove 2 DOF, but only 1 DOF that remains. |

1.SHIFT+CLICK a sketch-element in the graphic-area The sketch-element and constraints added to it, show in the Selection-Window. 2.Right-click the constraint in the Selection-Window 3.Click Delete in the contextual-menu |