Add Coincident Constraint

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Add Coincident Constraint

Add Coincident

MD-Toolbar-Constraints-COI

A Line and Line (CoincidentLtoL) :

Add Gearing FB

1.Click Constraints toolbar > Add Coincident

OR

1.Click Add menu > Constraints sub-menu> > Add Coincident

Then:

2.Click a Line*

3.Click a different Line*

The Lines* are now Collinear.

* Line, CAD-Line, X-axis, or Y-Axis
Before Coincident LtoL

Before Coincident LtoL
After: CoincidentLtoL

After: CoincidentLtoL

A Point and Point (CoincidentPtoP) :

Add Gearing FB

1.Click Constraints toolbar > Add Coincident

OR

1.Click Add menu > Constraints sub-menu> > Add Coincident

Then:

2.Click a Point*

3.Click a different Point*

The Points* are now Coincident.

* Point, start-Point, end-Point, or center-Point
Before CoincidentPtoP

Before CoincidentPtoP
CoincidentPtoP

CoincidentPtoP

Point and Line (CoincidentPtoL) ; Point and Circle (CoincidentPtoC)

Add Gearing FB

1.Click Constraints toolbar > Add Coincident

OR

1.Click Add menu > Constraints sub-menu> > Add Coincident

Then:

2.Click a Point*

Then:

3.Click a Line**

The Point* is now Coincident with the ray of the Line**

or

3.Click a Circle or Arc

The Point* is now Coincident with the circumference of the Circle or Arc

* Point, start-Point, end-Point, or center-Point

** Line, CAD-Line, X-axis, or Y-Axis
After  CoincientPtoL

After
CoincientPtoL
After CoincidentPtoC

After CoincidentPtoC

Delete Coincident

1.SHIFT+CLICK a sketch-element with a Coincident Constraint.

The sketch-element and CoincidentPtoP, CoincidentPtoL, and/or CoincidentPtoC constraint show in the Selection-Window.

In the Selection-Window:

2.Right-click the CoincidentLtoL, CoincidentPtoP, CoincidentPtoL, or CoincidentPtoC constraint

3.Click Delete in the shortcut menu

Note: Coincident Constraints, Points and Lines, and Degrees-of-Freedom

Coincident Constraint, Points, and Degrees-of-Freedom

A Point* has two degrees-of-freedom.

1.If you add a Coincident Constraint between a Point* and a Line** (CoincidentPtoL) you remove 1 degrees-of-freedom.

2.Then, add a Coincident Constraint between two Points* (CoincidentPtoP) - which attempts to remove 2 more degrees-of-freedom.

However, it is not possible to remove three(3) degrees-of-freedom from a Point*.

Therefore, the Points* do not move together when you add the CoincidentPtoP

To correct the problem, you must delete the CoincidentPtoL - see Delete Constraint.

* Point, start-Point, end-Point, or center-Point

** Line, CAD-Line, X-axis, or Y-Axis