Lecture Autodesk inventor CAD viewing and coordinate system commands. The main contents of the chapter consist of the following CAD command categories, CAD viewing commands, viewing in AutoCAD, CAD coordinate systems, right hand rule, CAD coordinate system commands.
Trang 1CAD Viewing and Coordinate System Commands
Trang 2CAD Command Categories
Object (draw, modify)
View
Coordinate System
Trang 3CAD Viewing Commands
Control position from which an object is
viewed
Viewer moves, not the object
2D viewing controls
Pan
Zoom
3D viewing controls
Compose pictorial and orthographic views
Trang 4Viewing in AutoCAD
PAN
Zoom
3DOrbit
View Toolbar
VPoint
VIEW
PLAN
DView
VPORTS
Trang 5CAD Coordinate Systems
Governed by the Right Hand Rule
Defines a workplane
Unique, default global coordinate system
Many user-defined, local coordinate systems
Trang 6Right Hand Rule - 1
Thumb indicates the
positive x direction
Index finger indicates
the positive y direction
Middle finger indicates
the positive z direction
Palm of the right hand
represents the xy plane
Used to define the positive direction of the axes of a three dimensional coordinate
system
Trang 7Right Hand Rule - 2
Right thumb aligned
with positive axis
direction
Positive rotation
indicated by direction
of four fingers
curling about axis
Variation used to determine direction of positive rotation about an axis
Trang 8WorkPlanes
Trang 9CAD Coordinate System Commands
Creates a new, user-defined workplane Used to translate and/or rotate a coordinate system User-defined
coordinate system assists in
object/feature
Trang 10Coordinate Systems in AutoCAD
Global coordinate system is called World
Coordinate System (WCS)
Defines a horizontal xy workplane
Top (plan) view is default
Local coordinate system is called User
Coordinate System (UCS)
User defined
Trang 11Coordinate System Control in AutoCAD
UCS Toolbar
UCS command UCSICON command ddUCs
Trang 12CAD Viewing and Coordinate System Commands
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