Difference between CAD and CAM:
CAD: Computer-Aided Design (CAD)
can be defined as the creation, modification, analysis and optimization of a new component using a computer.
CAD involves
3 major elements:-
1. Hardware
2. CAD software
and
3. The user
The primary function
of CAD involves design, analysis and application to manufacturing. An object
drawn with CAD can be analyzed interactively on the CAD screen and the physical
information can be extracted from it.
In an
engineering sense, Cad also incorporates finite-element analysis, stress
analysis, heat transfer analysis, and fluid flow analysis and so on. I.e. which
enables a part to be constructed and tested virtually before any physical
object is manufactured.
CAM: computer-Aided
manufacturing (CAM) can be defined as the application of computers to plan,
process, manage and control various operations in a manufacturing organization either with direct or indirect computer interface with the available resources.
Keyboard input for Auto-CAD software:
How to use Keyboard Special
Keys in Auto-CAD software:
Keys
|
Action
|
ESC
|
Use the ESC
key to cancel all current actions and return to the Command: prompt.
|
ENTER
|
Press the
ENTER key following all keyboard input. You also complete many commands by
pressing ENTER.
|
SPACEBAR
|
Pressing
the SPACEBAR is equivalent to pressing the ENTER key and is often easier to
use. Pressing the SPACEBAR or ENTER at the Command: prompt repeats the last
command used.
|
UP &
DOWN arrows
|
Pressing
the UP and DOWN arrow keys will cycle through previous commands used.
|
TAB
|
The TAB key
is especially useful to navigate in a dialog box. Use the TAB key to move from
field to field. Be careful not to press ENTER.
|
How to use Keyboard Function Keys in Auto-CAD software:
Function
|
Description
|
F1
|
Displays Auto-CAD Help
|
F2
|
Toggles Text Window
|
F3
|
Toggles OSNAP
|
F4
|
Toggles TABMODE
|
F5 or CTRL+E
|
Toggles ISOPLANE
|
F6 or CTRL+D
|
Toggles UCS,
i.e. Coordinate Display on/off
|
F7 or CTRL+G
|
Toggles GRIDMODE.
|
F8 or CTRL+L
|
Toggles ORTHOMODE.
|
F9 or CTRL+B
|
Toggles SNAPMODE.
|
F10 or CTRL+U
|
Toggles Polar Tracking.
|
F11 or CTRL+W
|
Toggles Object Snap Tracking.
|
F12
|
Toggles Dynamic Input.
|
How to Use the Wheel Mouse in
Auto-CAD software:
To Do
|
You have to do
|
Zoom In
|
Roll the wheel forward.
|
Zoom Out
|
Roll the wheel backward.
|
Zoom Extents
|
Double-click the wheel button.
|
Pan
|
Hold down the wheel button and drag the mouse.
|
Constrained Orbit
|
Press and hold the SHIFT key and the wheel
button and drag the mouse.
|
Pan (Joystick)
|
Press and hold the CTRL key and the wheel
button and drag the mouse.
|
How to Use the Control Keys in Auto-CAD software:
CTRL+0
|
Turns user interface elements on/off
|
CTRL+1
|
Turns properties on/off
|
CTRL+2
|
Turns design centre on/off
|
CTRL+3
|
Turns tool palettes window on/off
|
CTRL+8
|
Launches calculator window
|
CTRL+A
|
Select all
|
CTRL+C
|
Copies objects to clipboard
|
CTRL+H
|
Turns a group on or off
|
CTRL+J
|
Repeats last command
|
CTRL+N
|
Opens create new drawing dialogue
box
|
CTRL+O
|
Opens the select file dialogue box
|
CTRL+P
|
Opens the plot dialogue box
|
CTRL+R
|
Switches between viewports
|
CTRL+S
|
Opens the save drawing as dialogue
box
|
CTRL+SHIFT+S
|
Save as
|
CTRL+V
|
Pastes data from clipboard to
drawing
|
CTRL+X
|
Removes select object from drawing
to clipboard
|
CTRL+Y
|
Performs the operation cancelled by UNDO
|
CTRL+Z
|
Undoes the last operation
|
CTRL+TAB
|
Switches between open drawings
|
CTRL+PAGE
UP
|
Switch up between layout tabs
|
CTRL+PAGE
DOWN
|
Switch down between layout tabs
|
Arrow
UP/DOWN
|
Recall last command
|
How to Entry Coordinates in
Auto-CAD software:
Location measured by distance from
0,0 in current UCS
|
#X,Y
|
Location measured by distance from
last point
|
@X,Y
|
Location measured by distance and
angle from 0,0 in current UCS
|
#distance<angle
|
Location measured by distance and
angle from last point
|
@distance<angle
|
Location by extracting and combining
coordinate values from 2 or 3 points
|
.x or.y or .xy etc
|
An angle override from current point
|
<angle
|