Add Coincident Constraint

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Add Coincident Constraint

Add Coincident

MD-Toolbar-Constraints-COI

Line and Line (CoincidentLtoL)

Add Gearing FB

1.Click Constraints toolbar > Add Coincident (right of graphics-area)

OR

1.Click Geometry menu > 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

Point and Point (CoincidentPtoP)

Add Gearing FB

1.Click Constraints toolbar > Add Coincident

OR

1.Click Geometry 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 Geometry 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

We do no show constraints in the graphics-area. You must find the constraint you want to delete.

1.SHIFT + Click a Circle or Arc in the graphics area.

If the sketch-element has a CoincidentPtoP, CoincidentPtoL, or CoincidentPtoC constraint, it shows in the Selection-Window.

2.Right-click the CoincidentPtoP, CoincidentPtoL, or CoincidentPtoC constraint in the Selection-Window.

3.Click Delete element in the shortcut menu.


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

Coincident Constraint, Points, and Degrees-of-Freedom

A Point* has two degrees-of-freedom. You cannot remove three degrees-of-freedom from a Point*.

For example:

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

Then, it is not possible to add a Coincident Constraint between the same Point and the start-Point or end-Point of the Line** (CoincidentPtoP) as that attempts to remove 2 more degrees-of-freedom, a total of three degrees-of-freedom.

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

To correct the problem, you must delete the CoincidentPtoL - see How to delete a Constraint


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

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