Chapter 3 orthographic projections in auto cad 2010

transcript

Chapter 3Orthographic Projections in AutoCAD

Topics

Ortho. Projection: TopicsSummary3.1) Introduction3.2) Layers3.3) Line Type Scale3.4) Properties3.5) Printing using Pen Widths3.7) Title Blocks3.8) Blocking3.10) Model and Layout Space

Creating Orthographic Projections in AutoCAD

Summary

Summary What will we learn in Chapter 3?

→ The tools necessary to draw an orthographic projection in AutoCAD.

Key points→ AutoCAD uses layers to help organize line

types and weights.

3.1) Introduction

Introduction Line types and line weights give valuable

information to the print reader.

Introduction AutoCAD enables you to create different

line types and to print using different line weights.

This is accomplished through the use of layers.

3.2) Layers

Layers Layers are like transparencies, one laid

over the top of another.→ Each layer contains its own line type.→ The line color controls the printed line

thickness.

Layers Let’s use

layers to organize this drawing.

The Layers Panel

The Layer Properties Manager

3.3) Line Type Scale

Line Type Scale LTSCALE: Controls the size of the

dashes and the spaces between dashes or dots.

3.4) Properties

Properties The properties of an individual object may

be changed by selecting the object and then selecting the Properties icon in the View tab - Palettes panel.

The Properties Panel If these properties need to be changed,

your first action should be to use layer properties. → This creates a much more organized

drawing.

3.5) Printing using Pen Widths

Printing using Pen Widths Object color is used to control the print

thickness of the object.→ Access the Page Setup window to assign

thickness’ to the different colors.

Prints each color black

Edit pen thickness’

Choose a color

Assign a line weight

3.7) Title Blocks

Title Blocks Every engineering drawing should have

both a border and a title block. → Border - defines the drawing area→ Title block - gives pertinent information

The information that is included depends on the drawing type, field of engineering, and viewing audience.

Title Block A title block may include:

→ Name of drafter→ Checked by→ School or Company→ Drawing title→ Part name→ Part number→ Material of part→ Number of required parts→ Sheet number→ Number of sheets→ Scale of drawing→ Date→ Last revision

3.8) Blocking

Blocking Commands used

→ BLOCK: Allows you to create a grouping of objects that can be used repeatedly in the current drawing.

→ WBLOCK: This command writes a BLOCK to a file. This allows you to use the BLOCK in all drawings not just the current one.

Blocking Commands used

→ INSERT: Allows you to retrieve a BLOCK or WBLOCK.

→ EXPLODE: (Modify panel ) Allows you to separate a BLOCK into its individual parts.

Live demonstration

3.10) Model and Layout Space

Model and Layout Space Model Space:

→ In model space, you draw your design/model at a 1:1 scale.

Layout/Paper Space:→ The model is scaled to fit on the paper used

to print the drawing (usually 8.5 x 11).

→ One view direction.

Layout/Paper Space:→ Multiple view directions through the use of

view ports.

Model and Layout Space Viewports:

→ A viewport is a rectangular window that views the object from a specified line of sight.

→ Viewports are most useful when working with a 3-D model. • You can create several viewports that view the 3-

D model from several different vantage points.

→ Annotations (dimension, text) may be included on 2-D drawings and one view 3-D drawings.

Layout/Paper Space:→ Annotations may be included in any view

→ Annotations will not scale automatically.

Layout/Paper Space:→ Annotations will scale automatically if the

object is defined as annotative.

Chapter 3 orthographic projections in auto cad 2010

Engineering