Engineering 22
©
AutoCAD
Advanced Cmds-1
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
1
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Learning Goals
 Use the ACAD “Osnap” tools to facilitate
point selection
 Use ACAD “Grips” to facilitate entity
modification
 Create and Use ACAD “Blocks”
 Create & Modify ACAD “Layers”
 Understand the Use of ACAD
“Attributes”
Engineering 22 – Engineering Design Graphics
2
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Object Snap → Osnap
 Object Snaps (Osnaps for short) are
drawing AIDS that are used in
conjunction with other commands to
help you accurately Select Entity-Points
 Osnaps allow you to snap onto a
specific object location when you are
picking a point.
• For example, using Osnaps allows you to
accurately pick the END-POINT of a line or
the CENTER of a circle.
Engineering 22 – Engineering Design Graphics
3
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap Utility
 Osnaps in AutoCAD are EXTREMELY useful
in that they allow the Designer to QUICKLY
construct Accurate Entities
Osnap ToolBar
Osnap Toggle
Engineering 22 – Engineering Design Graphics
4
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap Dialogs
 Activate the Osnap
menu by Ctrl+[rightclick]
 Osnap Settings
Suggest No Change
Engineering 22 – Engineering Design Graphics
5
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Endpoint
 The Endpoint Osnap snaps to the
end points of lines and arcs and to
polyline vertices.
• This is one of the most useful Osnaps
 Invocation.
• Tool Bar: EndPt icon (Above)
• Pull-down: Shift +
Right Click Endpoint
• Keyboard: END (when selecting objects)
Engineering 22 – Engineering Design Graphics
6
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Snap From
 Snap From HiLites typical “Osnap
Points” on the selected entity
• Essentially IDs modification “handles” or
“grips”
 Invocation.
• Tool Bar: Snap From
icon
• Pull-down: Shift +
Right Click From
Snap-From Handles Activated
• Keyboard: FRO or FROM (when picking)
Engineering 22 – Engineering Design Graphics
7
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → MidPoint
 Midpoint Osnap snaps to the
middle of lines and arcs and to the
midpoint of polyline segments.
• Another VERY Helpful command
 Invocation.
• Tool Bar: Midpoint icon
• Pull-down: Shift +
Right Click Midpoint
• Keyboard: MID (when picking)
Engineering 22 – Engineering Design Graphics
8
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Intersection
 Intersection Osnap snaps to the
physical intersection of any two drawing
objects; i.e., where lines, arcs or circles
etc. cross each other)
 Invocation.
• Tool Bar: Intersection icon
• Pull-Down:Shift +
Right Click Intersection
• Keyboard: INT (when picking)
Engineering 22 – Engineering Design Graphics
9
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Apparent INT
 Apparent Intersection snaps to the
point where objects
APPEAR to intersect
in the current view.
 Invocation.
• Tool Bar: Apparent INT icon
• Pull-Down:Shift + Right
Click Apparent Intersect
• Keyboard:APP or APPINT (when picking)
Engineering 22 – Engineering Design Graphics
10
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Center
 Center Osnap snaps to the center of
a circle, arc or polyline arc segment.
• The cursor must pass over the
circumference of the circle or
the arc to Find the Center
 Invocation.
• Tool Bar: Center icon
• Pull-Down: Shift +
Right Click Center
• Keyboard:CEN (when picking)
Engineering 22 – Engineering Design Graphics
11
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Perpendicular
 Perpendicular Osnap snaps to a
point which forms a perpendicular
with the selected object
• Normal: FROM-pt, TO-entity
• Deferred: FROM-entity, TO-pt
 Invocation.
• Tool Bar: Perpend icon
• Pull-Down:Shift +
Right Click Perpendicular
• Keyboard:PER or PERP (when picking)
Engineering 22 – Engineering Design Graphics
12
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Tangent
 Tangent Osnap snaps to a tangent
point on a circle or arc
• Normal: FROM-pt, TO-circ/arc
• Deferred: FROM-circ/arc, TO-pt
 Invocation.
• Tool Bar: Tangent icon
• Pull-Down: Shift +
Right Click Tangent
• Keyboard:TAN (when picking)
Engineering 22 – Engineering Design Graphics
13
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Nearest
 Nearest Osnap snaps to the nearest
point on a drawing object.
• NEA is useful if you want to make sure that
a pick point lies on a drawing object but the
Exact Location is Unimportant
 Invocation.
• Tool Bar: Nearest icon
• Pull-Down: Shift +
Right Click Nearest
• Keyboard:NEA or NEAR (when picking)
Engineering 22 – Engineering Design Graphics
14
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Osnap → Quadrant
 Quadrant Osnap snaps to one of the
four circle quadrant points located at
north, south, east and west; or 90°,
270°, 0° and 180° respectively
 Invocation.
• Tool Bar: Quadrant icon
• Pull-Down:Shift +
Right Click Quadrant
• Keyboard: QUA or QUAD (when picking)
Engineering 22 – Engineering Design Graphics
15
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Grips
 Quickly ID’s important points on
Drawing Entities
 Act as “Handles” for MOVING or
MODIFYING the Entity
• Activate Grips by
clicking on the
Entities One at time
Engineering 22 – Engineering Design Graphics
16
– No Active Command
needed
– DeActive Grips
w/ Esc
Key
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Grip → Move
 Grips → Move
• Pick the CENTER
Grip point
 Note that the
HeptaGon Does
NOT have a Center
Grip and Thus
cannot be GripDragged
• Mouse-Drag to Move
Engineering 22 – Engineering Design Graphics
17
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Grip → Stretch
 Grips → Stretch
• Pick an EDGE Grip
point
• Mouse-Drag to
stretch
Engineering 22 – Engineering Design Graphics
18
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Grip → Scale
 Grips → Scale
• Pick an Edge Grip
Point
• Right-Click the Grip
to invoke the
PullDown Menu
– Select Scale
• Drag the Grip Handle
to Increase Scale
Engineering 22 – Engineering Design Graphics
19
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Grip → Mirror
 Grips → Mirror
• Pick an Edge Grip
Point
• Right-Click the Grip
to invoke the
PullDown Menu
– Select Mirror
• Drag the Grip Handle
to To Create “Mirror”
Line
• Left-Click to Make
Mirror Image
Engineering 22 – Engineering Design Graphics
20
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
AutoCAD Blocks
 A Block is a COLLECTION of all of the
line and arc entities that create an
object, Grouped & “Frozen” together to
make ONE selectable object
• Selecting one particular entity (such as a
midpoint of a line for example) will select
ALL objects contained within the block.
• Blocks can be moved, rotated, mirrored etc
and will always be treated by Autocad as a
SINGLE Object
Engineering 22 – Engineering Design Graphics
21
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Block Creation → Example
 We’re Making an
electrical Schematic
for ENGR43 and we
need to use the
Symbol for a
polarized capacitor:
 Plan to speed the
Circuit Design
Process → Make a
Block for the Cap
Symbol:
• Many times
• On Several
Drawings
Engineering 22 – Engineering Design Graphics
22
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Insert Block
 With the Cap-Block
in-hand, can easily
insert it whenever
needed
 PullDown Menu
 Activate the INSERT
Dialog Box by one
of
 INSERT Dialog Box
• Command Line
Engineering 22 – Engineering Design Graphics
23
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Insert Block cont
 Click Browse
 From List Pick Cap
 Note the Options list
• Insertion point
• Scale
• Rotation
• Block Unit
 In this case accept
Defaults
Engineering 22 – Engineering Design Graphics
24
 Click OK to Activate
On-Screen Insertion
 Find the insertion
Point on Screen and
then click to
complete insertion
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Block: Scale & Rotate
Engineering 22 – Engineering Design Graphics
25
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Explode Block
 Explode command
“UNblocks" single
objects back to their
constituent parts
• i.e., the command
returns blocks back
to their individual
component parts
 NONexploded Block
• Note the Single Grip
at the INSERTION Pt
 EXploded Block
 Invocation
• Grips for EVERY
COMPONENT
Engineering 22 – Engineering Design Graphics
26
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
WBlock (“Write” Block)
 Blocks made in a
given Dwg are part
of the that Particular
.dwg File
 Wblock Dialog Box
• i.e., the Block is NOT
available to other
Drawings
 To make a Block
“Globally” Available
use the WBLOCK
KeyBd Command
Engineering 22 – Engineering Design Graphics
27
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
WBlock (“Write” Block) cont
 Independent
FileName
Engineering 22 – Engineering Design Graphics
28
 Return to Wblock
Dialog Box, Click
OK
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
WBlock (“Write” Block) cont
 Confirm the Write
• Select the Block,
then hit Enter ()
Engineering 22 – Engineering Design Graphics
29
 Insert the Wblock
into another Dwg
 Use INSERT to
Activate Dialog Box
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
WBlock (“Write” Block) cont
 Find the Block
FileName with the
Std Windows box
Engineering 22 – Engineering Design Graphics
30
 Select the FileName
then Click Open
• Note that ENTIRE
DRAWINGS Can be
Inserted with
WBLOCKBruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
All Done for Today
Some Blocks
from my
Practice-Days
Engineering 22 – Engineering Design Graphics
31
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Engr/Math/Physics 25
Appendix
f x   2 x  7 x 
9x  6
3
2
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
32
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Construct Cap Block
 The LineWork Progression
Engineering 22 – Engineering Design Graphics
33
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt
Build Cap-Block
 Pull-Downs, and Dialog-Boxes



Engineering 22 – Engineering Design Graphics
34
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-05_AdvanCmd-1.ppt