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BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt1
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Bruce Mayer, PELicensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22
DimensionDimensioninging
Part-2Part-2
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt2
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Chp.8 Learning GoalsChp.8 Learning Goals
Apply Proper/Conventional Dimensioning Standards to Adequately Describe a Physical Object (e.g., a Machined Part) Such that It may be Properly Fabricated
Use AutoCAD to Dimension to Standards Orthographic Projections Views in Both Dimension-Line and BaseLine Forms
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt3
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
AutoCAD DimensioningAutoCAD Dimensioning AutoCAD does SEMI-AUTOMATIC
dimensioning• You select the features which should be
dimensioned and the location for each dimension
AutoCAD measures the distance in question and applies the appropriate dimension• Complete with arrowheads, extension
lines, and dimension lines
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt4
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Invoke ACAD DimensioningInvoke ACAD Dimensioning
Turn on the Dimensioning ToolBar
Use the PullDown Menu
Type in Using Command Line dimlinear dimdiameter dimradius
dimbaseline dimcontinue dimordinate
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt5
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Live Dimension DemoLive Dimension Demo
Let’s Dimension some simple parts
DimLine Example BaseLine (Ordinate)Example
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt6
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles - 1 Dimension Styles - 1 Lets copy from the
DimLine example the Part-Drawing, but NOT The Dims Using• Dim Layer-Off
• Select-All & CopyClip
• Paste
Open New file using Acad.dwt
Then apply DimLines using DimLin to yield
The Dims are OUT of PROPORTION Relative to Object
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt7
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 2 Dimension Styles – 2 Fix this Lack of
ProPortion Using a Dimension Style• Estimate that Arrows
& Text are about 4X too Large
Adjust overall Proportions by
New Layer at ¼-Scale & 3-Decimals
Activates the DimStyle Dialog Box
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt8
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 2 Dimension Styles – 2 After Clicking New...
Name the New “Style” “_25X-3Plcs”
New Layer at ¼-Scale & 3-Decimals
Clicking Continue→ Automatically Directed to “Fit” Tab
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt9
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 3 Dimension Styles – 3 Next Select “Primary
Units” Tab Set “Unit Dimensions”
Precision → 0.000
Let’s Also Change the “Angle Dimensions” Precision → 0.0 (in degrees)
Click OK to accept Changes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt10
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 4 Dimension Styles – 4 Taken Back to Dim
Style Mgr Select Style: “_25-
3Plcs” For this style “Set
Current”
Click Close to Activate the _25-3Plcs Style
Now Use “Match Properties” to Fix Dims
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt11
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 5 Dimension Styles – 5 Use DimLin to ADD
a part-width Dimension
Next, Pick the New-Dim, then Hit the MatchProp Tool
Note the New Dim 0.844
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt12
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 6 Dimension Styles – 6 Click the OverSize
Dims one-at-a-time with the MatchProp Paint Brush
Click All Dims to Yield
Still Some Style Probs
Too Far
Not Between Ext Lines
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt13
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 7 Dimension Styles – 7 Additional Style Fix
• Put Dim Between arrows When Possible
Again Active Dim Style Mgr• This Time Pick
Modify
Then Pick the Fit Tab
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt14
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 8Dimension Styles – 8 Under “Fit Options”
Pick “Arrows”
Click OK to Return to Dim Style Mgr
Click Close to Activate the Modifications to Style: “_25-3Plcs”
Find that The 0.219 Dim Fixed Automatically
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt15
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 9 Dimension Styles – 9 The Modified Result The OverSize Spacing
on the BaseLined Width Dims is a LEFTOVER from the “Standard” Dim Style
Erase the Width Distances and Re-Dim with the Modified Style: “_25-3Plcs”
Fixed Automatically
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt16
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Dimension Styles – 10Dimension Styles – 10 The Final Result of the Dim Style
Management
Looks Much Better
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt17
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Explore Dimension Styles Explore Dimension Styles I Suggest that you
spend some Time Exploring the Result of Dim Style Changes; e.g.
Can Now “Slide” the Dim-No. Location Lt-Rt or Up-Dwn
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt18
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Place Text Manually ResultPlace Text Manually Result Dim No. Slid to the Right in this case
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt19
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Caveat - Dim StylesCaveat - Dim Styles
Dim Styles Have Frustrated The Instructor (me) for Years
Even with Extensive Hacking, I still get Unpleasantly Surprised by the Result From Dim Style Management
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt20
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
All Done for TodayAll Done for Today
Be SUREto Read theAPPENDIX
0.234
0.234
0.844
0.090
0.219
0.437
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt21
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Bruce Mayer, PELicensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engr/Math/Physics 25
AppendiAppendixx
6972 23 xxxxf
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt22
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
DimLine Demo - 1 DimLine Demo - 1
1. Open File• DimLine_Dim_Exa
mple_016_Hinge_Spacer_0305_.DWG
2. Strip Out Existing TitleBlk & Dims• Turn off all Layers
but DIM
3. Set Snap to 0.1”
4. DimLinear• TopLeft-Corner to
circle-ctr-line
5. DimBaseline to complete width dims
6. On Left-Edge Dim Ht to Hole (0.219)
7. On Rt-Edge Dim Part Ht (0.437)
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt23
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
DimLine Demo - 1DimLine Demo - 1
8. Make xline from 0.234 arrow
9. On Side-V dim 0.09 thickness using nea to place arrows on xline
10.Erase the xline
11.From Rt-Circ make xline using @10,<-60
12.Leader to Circle Boundary, nea to xline
13.Leader Text making Ø w/ %%c• %%C0.219, 2X
14.Use Mtext to make Note• Light Break, All
Sharp Edges
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt24
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
DimLine Demo – 3 (result) DimLine Demo – 3 (result)
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt25
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 1 OrdDim Demo - 1
1. Open File• BaseLine_Dim_Exa
mple_009_Drv-Cage_Hinge-Retainer_0305_.DWG
2. Strip Out Existing TitleBlk & Dims• Turn off all Layers
but DIM to delete dims
3. Set Snap to 0.1”
4. Call Fabricator and ask where the preferered Origin• They Say UPPER-
LEFT
5. Make xLines that coincide with the TOP and Left Edges
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt26
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 2OrdDim Demo - 2
6. Move the User Coord System Origin to the intersection of the two xLines with the UCS command• Use the NEW
option
7. Offset Left the vertical xLine by 1”• For Y-Dims
8. Invoke Ordinate Dimensioning with DimOrd
9. Pick the top-Lt Chamfer, and move to offset xline• Shows 0.000 as
Dim
10.Pick Lt end of Lt-C’Sink CtrLine
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt27
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 3 OrdDim Demo - 3
11.Move Left to the offset xLine using the “per” option• Sets Y-Dim to
0.375
12.Pick the Bot-Lt Chamfer, and move to offset xline using “per” option• Sets Y-Dim to
0.750
13.Offset UpWard the Horiz. xLine by 1”
14.Pick the Lt-Top Chamfer, and move to offset xline• Shows 0.000 as
Dim
15.Pick Top end of Lt-C’Sink CtrLine
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt28
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 4 OrdDim Demo - 4 16.Move Up to the
offset xLine using the “per” option• Sets X-Dim to
0.550
17.Repeat 15 & 16 for C-Sinks and Rt Edge to Complete all the X-dims• 2.800, 5.800, 8.050• 8.600
Next Dim Side-V 18.Make xLine with Lt-
Vertical Edge19.Offset Lt xLine by
1.00”20.Use DimLin to
“Arrow Dim” at xline Locations• Height = 0.750• Thickness = 0.90
21.Next Add-Notes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt29
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 5 OrdDim Demo - 5
22.Make xLine at Bot-Edge
23.Offset-Down xLine by 1.5”
24.Make xLine at Rt-Bot Chamf using “mid” & @10<-45
25.Leader from Chamf. MidPoint to Xline @45°
• Leader Text = “CHAM 0.12 X 45°, 4X”– Use “Alt248” to
make degrees symbol (°)
26.Make xLine from ctr of Lt-C’Sink with @10<-60
27.Leader from xLine and C’Sink intersection
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt30
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 6 OrdDim Demo - 6 • 2-Lines of Leader
Text as– %%C0.150 THRU,
CSK
– %%C0.282 X 100°, 4X
28.Offset-up Top-Edge xLine by 2”
29.Use Leader to Label Part-No. Box with Reference to Note-2
See Next Slide for Result BEFORE Stripping Out the xLines
Note: When Possible Use ASME Y1.1 Abbreviations• See List in
Appendix
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt31
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 7OrdDim Demo - 7
Just Before Erasing Construction Lines
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt32
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
OrdDim Demo - 9OrdDim Demo - 9
Erasing Construction Lines using Erase + Crossing
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt33
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Insert Csink, Cbore, Depth SymsInsert Csink, Cbore, Depth Syms
2X click dim boxes to activate MText dialog Box
Got to Symbol tool
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt34
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Insert Csink, Cbore, Depth SymsInsert Csink, Cbore, Depth Syms
GoTo OTHER on PullDown Menu
Activates the Character Map with the current Font as default
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt35
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Insert Csink, Cbore, Depth SymsInsert Csink, Cbore, Depth Syms
Pick AutoCAD’s GDT Font
Pick Select & Copy Symbol
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt36
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Insert Csink, Cbore, Depth SymsInsert Csink, Cbore, Depth Syms
Paste Symbol into MText box that serves as text for the DimLeader
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt37
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt38
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Counter-Drilled HolesCounter-Drilled Holes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt39
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Counter-Sunk HolesCounter-Sunk Holes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt40
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Counter-Bored HolesCounter-Bored Holes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt41
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Spot-Faced HolesSpot-Faced Holes
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt42
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
Threads & KnurlsThreads & Knurls
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt43
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ChamfersChamfers
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt44
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ASME Y1.1 Std AbbreviationsASME Y1.1 Std Abbreviations Alloy → ALY Aluminum → AL American Wire
Gage → AWG Assembly → ASSY Auxiliary → AUX Bevel → BEV Bill of Material →
B/M
Bolt Circle → BC Brass → BRS Broach → BRO Center Line → CL Chamfer → CHAM Circle → CIR Cold Drawn Steel →
CDS
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt45
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ASME Y1.1 Std AbbreviationsASME Y1.1 Std Abbreviations Cold Rolled Steel →
CRS CounterBore →
CBORE CounterDrill →
CDRILL CounterPunch →
CPUNCH CounterSink → CSK
Degree → ° or DEG Design → DSGN Diameter → DIA Elevation → EL Engineer → ENGR Existing → EXIST. Flat Head → FH Gage or Gauge →
GA
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt46
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ASME Y1.1 Std AbbreviationsASME Y1.1 Std Abbreviations Hardware → HDW Hot Rolled Steel →
HRS Inch → “ or IN Inside Diameter →
ID Keyway → KWY Laminate → LAM Material → MATL
Maximum → MAX Millimeter → MM Minimum → MIN Mounting → MTG National → NATL North → N Number → NO. Obsolete → OBS
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt47
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ASME Y1.1 Std AbbreviationsASME Y1.1 Std Abbreviations Outside Diameter →
OD OverAll → OA Point → PT Polish → POL Pound → LB Pounds per Sq-Inch
→ PSI Push Button → PB
Radius → R Required → REQD Room Mean Square
→ RMS Round → RD Screw → SCR Sheet → SH Spot Face → SF Steel → STL
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt48
Bruce Mayer, PE Engineering 22 – Engineering Design Graphics
ASME Y1.1 Std AbbreviationsASME Y1.1 Std Abbreviations Structural → STR Taper → TPR Thick → THK Thread → THD Through → THRU Tolerance → TOL Typical → TYP Versus → VS Volume → VOL
Washer → WASH. Week → WK Wrought → WRT Yard → YD
Feet → ‘ or FT Mile → MI
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