Page 324 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Components of a Dimension (Fig 1)
Before you start the exercises in this chapter, it will help to know the names of the parts of a dimension. Figure
shows a sample of a dimension with the parts labeled. The dimension line is the line that represents the distance
being dimensioned. It’s the horizontal line with the diagonal tick marks on either end. The extension lines are the
lines that originate from the object being dimensioned. They show you the exact location from which the dimension
is taken. The dimension text is the dimension value, usually shown inside or above the dimension line. They show
you the exact location from which the dimension is taken. The dimension text is the dimension value, usually shown
inside or above the dimension line.
Here Describe few Dimensioning commands

Fig 1

Dimlinear

Draws a linear dimension with the dimension either horizontal or vertical.
Dimaligned
Draws a linear dimension with the dimension line parallel to the selected dimension origin points. This lets you
align a dimension with an angled line that is not either exactly horizontal or vertical.
Dimradius
To draw dimensions of radius circles or arcs
Dimdiameter
To draw dimensions of diameter circles
Dimcontinue

Allows continued or series dimensioning.
Dimbaseline
Allows baseline or series dimensioning.
Qleader

Draws a line or series of lines with an arrow head (commonly called a “leader”) to point to an object to notate it.
This command will also prompt you for the note at the end of the leader line, but it will allow only one line of text.
The most useful method of using this command is to simply draw leaders between the object to be notated and
text that you create with the DTEXT command.
Dimedit
Editing the dimension object. Adjusts the obliquing angle of a linear associative dimensions and extension lines.
Useful in dimensioning isometric drawings.
Dimangular
Allows the dimensioning of angles.

Adjusting Dimension Styles
Dimstyle (D) (Figs 2 & 3)
From the dialog box You can create your own dimension styles after keeping the base as any one of the default
styles namely Annotative, ISO-25, Standard. Click New.

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CITS : Engineering Drawing (Mechanical) - Exercise 12