What is Autocad Dimension?

AutoCAD Dimension

Autocad Dimension | A TO Z full info. About with pictures | linear dimensions | Dimension line | Diameter Symbol AutoCAD| Architectural Dimensions

Hey Guys,

Previously we learned how to add text in the AutoCAD. Now, we will learn how to Dimension command from the ‘Annotation’ panel. So, let’s get started.

AutoCAD Dimension
AutoCAD Dimension

The purpose of using the Dimension command is to measuring anything what do you want according to the unit.

By using dimension command, we can get linear dimension (Line length), Align dimension (slop line length), Angular dimension (Angle between connected two lines), length of the arc, Radius if the circle, Diameter of the circle, Dimension from the (0,0) ordinate, Jogged dimension, etc.

We can select the Dimension command from the ‘Annotation’ panel in the Home tab. Or we can use shortcut keys to measure all 8 types of dimensions.

Now we will learn about all types of dimension.

1) Linear Autocad dimension

The Linear dimension is created linear dimensions for all types of lines.

Linear dimension means straight dimension, if you will measure the sloped line, it will measure only straight dimension from the first point to the last point.

Linear dimension-AutoCAD
Linear dimension-AutoCAD

Select ‘Linear dimension’ from the Annotation panel in the Home tab. Or type ‘DLI’ in the command bar and press the Enter key.

It will ask for ‘specify first extension line origin’. Select the first point of line or point of the object which we want to measure.

Then it will ask for ‘specify second extension line object’. Select the second point of the line or point of the object.

It will ask for ‘specify dimension line location’. Select location for the dimension line or we can also give dimension like 10mm.

It will show as shown.

2. Align Autocad Dimension

An align dimension is created to align the dimension of lines. Align dimension means we can measure the proper dimension of the sloped lines.

Align dimension-AutoCAD
Align dimension-AutoCAD

Select ‘Align dimension’ from the Annotation panel in the Home tab. Or type ‘DAL’ in the command bar and press the Enter key.

It will ask for ‘specify first extension line origin’. Select the first point of line or point of the object which we want to measure.

Then it will ask for ‘specify second extension line object’. Select the second point of the line or point of the object.

It will ask for an ‘extension’. Select location for the dimension line or we can also give dimension like 10mm.

It will show as shown below.

3. Angular Autocad dimension

Angular dimension measures the angle between two lines either both are joint or not. It also measures the angle of arc or angle between two points of the circle.

Angular dimension-AutoCAD
Angular dimension-AutoCAD

Select ‘Angular dimension’ from the Annotation panel in the Home tab. Or type ‘DIMA’ in the command bar and press the Enter key.

It will ask for ‘select arc, circle, and the line’. Select the first line if we want an angle between two lines or select arc, or select the first point of the circle if we want an angle in a circle.

For arc, by selecting arc, it will show angle after selecting arc.

For lines, it will ask for ‘select second line’. Select the second line to measure the angle between two lines.

For a circle, it will ask for ‘select second angle endpoint’. Select the second point on the circle to measure the angle between two points.

After selecting the second line for the line or selecting the second point for the circle, it will ask for specifying dimension line location or extension. Give a particular length or select any location for dimension line as per requirement.

It will show you a degree symbol as shown.

4. Arc length

The Arc length measures the length of the arc or length of the segment of any polyline.

Arc length dimension-AutoCAD
Arc length dimension-AutoCAD

Select an arc length from the Annotation panel in the Home tab. Or type ‘DAR’ in the command bar and press the Enter key. ‘AR’ stands for Arc in ‘DAR’.

It will ask for ‘select arc or polyline arc segment’. Select an arc that we want to measure.

Then it will ask for ‘specify arc length dimension location’. Give location for arc length as the same as other dimensions.

It will show you an arc length symbol as shown.

5. Radius

The Radius measures radius of the circle and arc. ‘Radius means the length of the line from the center of the circle to the outer boundary of the circle.’

Radius
Radius dimension-AutoCAD

Select ‘Radius’ from the Annotation panel in the Home tab. Or type ‘DRA’ in the command bar and press the Enter key. ‘RA’ stands for Radius in ‘DRA’.

Then the procedure is the same, it will ask for ‘select arc or circle’.

After that, it will ask for ‘specify dimension line location’. Give location for dimension line.

It will show radius with the ‘R’ as shown.

6. Diameter

The diameter measures diameter of any circle or arc. ‘Diameter means the length of the straight line which passes through the center of the circle and touches outer boundary of the circle.’

Diameter
Diameter dimension-AutoCAD

Select ‘Diameter’ from the Annotation panel in the Home tab. Or type ‘DDI’ in the command bar and press the Enter key. ‘DI’ stands for diameter in ‘DDI’.

The procedure is the same as the Radius. Select a circle and then give a location for the dimension line.

It will show the diameter of the circle or arc with the symbol as shown.

7. Ordinate

The ordinate dimension measures horizontal and vertical length from the (0,0) origin ordinates in x-direction and y-direction. This type of dimension mostly uses in the center-line plan or line plan for showing beam and column positions.

Ordinate
Ordinate dimension-AutoCAD

Select ‘Ordinate’ from the Annotation panel in the Home tab. Or type ‘DIMORD’ in the command bar and press the Enter key. ‘ORD’ stands for ordinate in ‘DIMORD’.

It will ask for ‘specify feature location’. Select the point at which we want the ordinate dimension.

Then it will ask for ‘specify leader endpoint’. If want ordinates with x-direction, then select a point in the vertical direction. And if we want ordinate with y-direction, select a point in the horizontal direction.

It will show horizontal or vertical length from the (0,0) ordinates.

8. Jogged

Jogged dimension measures the Radius of the arc or circle. But the difference between the Radius dimension and the Jogged dimension is, in the Jogged dimension, you can set dimension text location as per requirement by yourself. And the dimension line will show in a Jogged shape.

Jogged
Jogged dimension-AutoCAD

Select ‘Jogged’ from the Annotation panel in the Home tab. Or type ‘JOG’ in the command bar and press the Enter key.

It will ask for ‘select arc or circle’.

Then it will ask for ‘specify center location override’. Select that point from where you want to show the dimension. It is not necessary to choose the center point only.

After that, it will ask for ‘specify dimension line location’. Specify dimension line location as per requirement.

At last, it will ask for ‘specify jog location’. Specify the jog location where you want.

(NOTE: If you have selected the original center point of the circle or arc, it will not show jog, it will show only the radius of the arc or circle.)

It’s done here.

By default in AutoCAD, we cannot see dimension text and arrow size. By default its setting is too small, we have to set those settings again. So, now we will learn how to do ‘Dimension settings’.

Dimension settings

We can do all settings from the ‘Annotation’ tab. Select the ‘Annotation’ tab and click on the small arrow in the ‘Dimension’ panel. One dialogue-box will open as shown.

Or we can ‘DIMSTY’ in the command bar and press Enter key. The same dialogue-box will open to do all dimension settings.

On the left side, we can see 3 options. Select any one as per requirement.

Annotative: Annotative dimension is used to show Annotative measurements for different sized scale sheets. It is working on the scale of the whole workspace.

ISO-25: It is used for 2D and Isometric drawing dimensions.

Standard:  This is the standard style.

Click on the ‘Modify’ option. Another main dialogue-box will open. There are different 7 tabs are available for different settings.

Dimension settings-AutoCAD
Dimension settings-AutoCAD

1. Lines

We can change Dimension line (Arrow lines) color, Line weight (Thickness of the line), Line Type (Continue or dashed), etc.

Also, we can edit the Extension line (Two vertical parallel lines). We can change color, line type, and line weight.

We can extend or decrease the line gap of the extension line from here.

2. Symbols and Arrows

From this tab, we can change the First arrow style and Second arrow style. Also, we can change the arrow size as per requirement.

3. Text

From this tab, we can modify text style, text color, and fill color. The main thing is we can change text height from here.

Also, we can change text placement above, below, center etc.

4. Fit

We can modify text and dimension line position from this tab.

5. Primary units

Change unit from here, which is set at the starting of the drawing in the workspace (mm, meter, cm, inch, feet, etc.) Otherwise, it can show the wrong dimension at the time of measurement.

Also set precision as per requirement.

In primary units, we can show the symbol of the dimension as m, mm, or inch, etc. from the ‘Prefix and Suffix’ option. Write dimension in the prefix or in the suffix as per requirement. It will show the dimension as shown.

Also, we can change Angle units from here.

Primary Unit-AutoCAD
Primary Unit-AutoCAD

6. Alternate Units

If I want to show alternate units with the main unit, then click on the ‘Display alternate units’. It will show two units, for example, 250mm, 0.25m.

After clicking, set alternate unit format and precision.

The main important thing is after the set unit, set ‘Multiplier for alt unit’. It means set relation of multiplier or divider by the main unit.

For example, the primary unit is in mm and I want alternate units as an inch. 1 mm=0.0393701 inch. So we have to write ‘0.0393701’ as ‘Multiplier for alt unit’. And write in suffix, inch.

Alternate Unit-AutoCAD
Alternate Unit-AutoCAD

7. Tolerance

Tolerance means sometimes we have not precise dimension and we want to show some dimension is either + or – some units.

For this type of dimension, set unit, upper value, and lower value. If there are alternate units, its tolerance also can be show from here.

Tolerance setting-AutoCAD
Tolerance setting-AutoCAD

How to add jog (Break line) in between dimension line?

Select the ‘Annotation’ tab and select the ‘Jog line’. Or type ‘DIMJOGL’ in the command bar and press the Enter key for invoke-command.

Then it will ask for ‘select dimension to add jog’. Select those dimension line in we want to add jog.

After that, it will ask for ‘specify jog location’. Specify the location to add the jog. Jog will be added.

Jog-AutoCAD
Jog-AutoCAD

Edit:

To edit jog height, select dimension line and right-click. Select properties from there.

From that dialogue-box, we can edit ‘Jog height’ and other things also.

It’s done here.

Thank you for visiting here…

Also, read our previous Articles.

1 Trackback / Pingback

  1. How to use the AutoCAD stretch command? » Autocadprojects.com

Leave a Reply