# ENGR-22_Lec-17_Dimensioning-2.ppt 1 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Bruce Mayer, PE Licensed Electrical.

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BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 1 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu Engineering 22 Dimensioning Part-2

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 2 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Chp.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.ppt 3 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics AutoCAD 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.ppt 4 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Invoke 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.ppt 5 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Live Dimension Demo Lets Dimension some simple parts DimLine Example BaseLine (Ordinate) Example

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 6 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 7 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 8 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 9 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Dimension Styles – 3 Next Select Primary Units Tab Set Unit Dimensions Precision 0.000 Lets Also Change the Angle Dimensions Precision 0.0 (in degrees) Click OK to accept Changes

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 10 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 11 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 12 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 13 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 14 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Dimension 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.ppt 15 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 16 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Dimension Styles – 10 The Final Result of the Dim Style Management Looks Much Better

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 17 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 18 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Place Text Manually Result Dim No. Slid to the Right in this case

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 19 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Caveat - 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.ppt 20 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics All Done for Today Be SURE to Read the APPENDIX

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 21 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu Engr/Math/Physics 25 Appendix

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 22 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics DimLine Demo - 1 1.Open File DimLine_Dim_Exa mple_016_Hinge_S pacer_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.ppt 23 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics DimLine 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.ppt 24 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics DimLine Demo – 3 (result)

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 25 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics OrdDim Demo - 1 1.Open File BaseLine_Dim_Exa mple_009_Drv- Cage_Hinge- Retainer_0305_.D WG 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.ppt 26 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics OrdDim 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- CSink CtrLine

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 27 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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- CSink CtrLine

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 28 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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 Edge 19.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.ppt 29 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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-CSink with @10<-60 27.Leader from xLine and CSink intersection

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 30 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics 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.ppt 31 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics OrdDim Demo - 7 Just Before Erasing Construction Lines

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 32 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics OrdDim Demo - 9 Erasing Construction Lines using Erase + Crossing

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 33 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Insert 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.ppt 34 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Insert 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.ppt 35 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Insert Csink, Cbore, Depth Syms Pick AutoCADs GDT Font Pick Select & Copy Symbol

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 36 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Insert 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.ppt 37 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 38 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Counter-Drilled Holes

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 39 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Counter-Sunk Holes

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 40 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Counter-Bored Holes

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 41 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Spot-Faced Holes

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 42 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Threads & Knurls

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 43 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Chamfers

BMayer@ChabotCollege.edu ENGR-22_Lec-17_Dimensioning-2.ppt 44 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics ASME 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.ppt 45 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics ASME 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.ppt 46 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics ASME 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.ppt 47 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics ASME 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.ppt 48 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics ASME 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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