Why use 'Add Dimension'?

Use Add Dimension to define the Length or Radius of a sketch-element, or the Distance, or the Angle between sketch-elements.

Note: you can also define the Distance, or an Angle, between the X-axis or Y-axis and a sketch-element.

See more How to add a dimension


Add Dimension

Toolbar-SE-AddDimension

Toolbar :

Part-Editor : Geometry toolbar

Menu :

Part-Editor : Add menu > Geometry sub-menu> > Add Dimension

To Add a Dimension:

1.Part-Editor: Geometry toolbar > Add Dimension
2.Part-Editor: Click sketch-elements to add a distance, a radius, or an angle

The dimension shows near to your mouse-pointer.

3.Part-Editor: Click in the graphic-area to place the dimension and extension lines next to your mouse-pointer.

The Dimension dialog-box opens.

Dialog-13.2-Dimension

4.Edit the dimension in the dialog-box

Negative Dimensions.

Do not delete the sign. It is best to ignore it. Edit the dimension in the normal way.

See Why the dimension is negative.
See How to Edit Parameters in dialog-box.

5.Click OK-tiny-13-17 to close the Dimension dialog-box

The Dimension is now in the graphic-area.


 

Notes:

When sketch-elements are fully defined, you cannot add a driven-dimension.

You can add Measurement FB in the Mechanism-Editor as a driven-dimension.

Generally, do not make a dimension zero. It is better to add a constraint (See Sketch-Constraints toolbar) to move Lines or Points together.

See also: Dimension Font Size

To edit a Dimension:

1.De-select all other commands
2.Double-click the arrowhead of a dimension element

Why the 'arrowhead'?

MechDesigner will not respond if you click the Dimension Number

And, simply, it is more difficult to click the dimension-lines or extension-lines.

See How to open a Dialog-box

How to add a dimension:

btn_delkeywordLocate a Point

Locate a Point in a Part in one of two ways:

Add Dimensions

Examples

Dimension

How?

Selection-Window

Geometry-Tree

Dimension-P2P

Shortest distance between two Points
Click each Point

DimPtoPn

Dimension-P2L

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

Lock & Specify in the Point Vector and Location dialog box

Example

Dimension

Selection-Window / Geometry-Tree

Dialog-PointVectors-PartCoords-1

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 the Point

has a dimension,

or

a constraint

How?

1.Double-Click a Point in the Part-Editor

- or -

1.Double-Click a Point in the Mechanism-Editor

The Point Vector Display and Location dialog-box opens.

Expand Point Coordinates

2.Select the Lock and Specify check-box.
3.Enter 'x' and 'y' values for the Point, with Part Coordinates
btn_delkeywordDistance

Example

Dimension:

How?

Selection-Window / Geometry-Tree

Dimension-L

Length of a Line

 

Click the Line

Dimn

Dimension-LL

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
2.Click the Line.

DimLtoLn

Dimension-P2P

Shortest distance between two Points
Click each Point

DimPtoPn

Dimension-HorizontalLP

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

 

Dimension-VerticalLP

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

 

Dimension-P2L

Perpendicular distance between a Point and a Line (or axis).

Top-tip: Click the Point then the Line (or axis).

Note: Arcs, Circles and Lines have Points.

DimPtoLn

btn_delkeywordRadius

Example

Dimension:

How?

In Selection-Window as:

Dimension-Radius

Radius of a Circle

 

Click the Circumference of a Circle

DimRadiusn

Dimension-Radius-Arc

Radius of an Arc
Click the Radius of an Arc

DimRadiusn

btn_delkeywordAngle

Example

Dimension:

How?

In Selection-Window as:

Dimension-Angle-3Points

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

DimAngPPPn

Dimension-Angle-Line

Angle between two Lines
Angle between an axis and a Line

The Lines do not need to cross.

Click each Line

The displayed angle has rules. See Below

 

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, you can select which angle to display.

There are eight possible angle dimensions:

Move your mouse counter-clockwise around the apex of the two Lines, the 'acute', 'obtuse', 'supplementary', or the 'vertical' angle <180° will show.
Move your mouse clockwise around the apex of the two Lines, and the 'reflex' angles to the other angles will show.

Video:

'Expand' then 'Play'

How to...

Add 1 from 8 possible angles between two Lines

 

Tutorials and Reference Help Files for MechDesigner and MotionDesigner 14.2 + © Machine, Cam, Mechanism, and Motion Design Software by PSMotion Ltd