Why use 'Add Dimension'?
Use Add Dimension to locate sketchelements.
Add Dimension can define Distances, Radii, and Angles.
See more 'How to add a dimension'.
Add Dimension

Toolbar:


Menu:


To Add a Dimension:
Note: If the dimension you want to add is already defined, with dimensions or with other constraints, then you cannot add a 'driven' dimension.
3.  Click one or more sketchelements to dimension a distance, a radius, or an angle 
The dimension shows near to your mousepointer
4.  Click in the graphicarea to place the dimension and extension lines next to your mousepointer. 
The Dimension dialogbox opens.
5.  Edit the dimension in the dialogbox 
6.  Close the the Dimension dialogbox 
•  Click the button 
OR
•  Press the 'enter' key on you keyboard 

The Dimension is now in the graphicarea.

To edit a Dimension:
A command cannot be active. If necessary:
1.  Deselect or any other command cannot be active]. 
In the graphicarea:
2.  Doubleclick the arrowhead of a dimension element 
Note: We recommend you click the arrowhead because it more difficult to click the dimensionlines or extensionlines.
MechDesigner does not respond if you click the Dimension Value/Number..
See How to open a Dialogbox


•  When sketchelements are fully defined, you cannot add a new dimensions or constraints. You can use the Measurement FB in the MechanismEditor to add a 'Driven Dimension'*. 
•  Generally, do not make a dimension zero. It is better to add a constraint [See SketchConstraints toolbar] to move Lines or Points together. 

See also: Dimension Font Size

How to add a dimension to:
Specify the location of a Point in a Part in one of two ways:

Add Dimensions
Examples

Dimension

How?

SelectionWindow
GeometryTree


•  Shortest distance between two Points 


DimPtoPn


•  Perpendicular distance between a Point and a Line 
•  You can also use the X–axis and the Y–axis as a line. 

•  Click the Point then the Line (note Arcs, Circles and Lines have Points) 

DimPtoLn

Use 'Lock & Specify' in the Point Vector and Location dialog box
Example

Dimension

SelectionWindow
GeometryTree


•  'Lock and Specify' the exact location of a Point in a Part. 
•  The Point cannot be moved accidentally. 

Pointn
Note:
You cannot 'Lock and Specify' the Point if it has zero or one degreeoffreedom.

How?

1.  DoubleClick a Point in the PartEditor 
 or 
1.  DoubleClick a Point in the MechanismEditor 
The Point Vector Display and Location dialogbox opens.
2.  Select the Lock and Specify check box. 
3.  Enter 'x' and 'y' values for the Point, with Part Coordinates 


Example

Dimension:

How?

SelectionWindow
GeometryTree




Dimn


•  Distance between two parallel Lines 
•  Distance between an axis and a parallel Line 

1.  Click a Point at the end of one of the Lines 

DimLtoLn


•  Shortest distance between two Points 


DimPtoPn


•  Horizontal Distance between Points 

1.  Add a Vertical Line from one of the Points 
2.  Click the Line and the other Point 



•  Vertical Distance between Points 

1.  Add a Horizontal Line from one of the Points 
2.  Click the Horizontal Line and the other Point. 



•  Perpendicular distance between a Point and a Line [or axis]. 

Toptip: Click the Point then the Line [or axis].
Note: Arcs, Circles and Lines have Points.

DimPtoLn

Example

Dimension:

How?

In SelectionWindow as:



•  Click the Circumference of the Circle 

DimRadiusn



•  Click the Radius of the Arc 

DimRadiusn

Example

Dimension:

How?

In SelectionWindow as:


•  Angle between an axis and a Line 
*The angle is between the intersection of the Line 'rays', even if the Lines do not cross.

The displayed angle has rules. See Below
Bug: When you edit an angle: sometimes the angle does not like passing through 180. If MechDesigner hangs, then please wait, maybe a minute!

DimAngLtoLn


Angle between two Lines  Rules:
The dimension shows next to your pointer when you select two Lines. Before you click your mouse again to define the displayed angle, select which angle to display; from a possible eight:
•  If you move your mouse (in a circular fashion) 'anticlockwise' around the *intersection[apex] of the two Lines, MechDesigner draws the angle less than 180° for the four angle possibilities – the 'acute', the 'obtuse', the 'supplementary' or the 'vertical' angle. 
•  If you move your mouse (in a circular fashion) 'clockwise' around the *intersection of the two Lines, the four 'reflex' angles to the four 'anticlockwise' angle possibilities are displayed. 


•  Angle between three Points 

•  Click the Point that will form the apex of the angle, followed by the other two Points. 

DimAngPPPn
