EN2_F07_P04_CADGeo_Student

EN2_F07_P04_CADGeo_Student - EN 2 Engineering Graphics and...

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1 EN 2 Engineering EN 2 Engineering Graphics and CAD Graphics and CAD Lecture 4 Lecture 4 2D Geometric Construction 2D Geometric Construction CAD CAD
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2 Announcements I nterested in Architecture? Interested in designing and building a structure on  campus? Come to the Tufts Architectural Society’s General I nterest Meeting! All majors welcome! Wednesday, Sept. 26, 10:15pm Campus Center Room 208
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3 Announcements Electrical and Computer Electrical and Computer Engineering Engineering Faculty Research Symposium Faculty Research Symposium Wednesday, September 26 th Halligan Hall  Room 111A Come Check Out:   Undergraduate Research Opportunities Sponsored by  Tufts IEEE and HKN
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4 Office Hours You are welcomed at any office hours.
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5 AutoCAD Terminology Drawing  Limits Drawing  Extents Objects Object Snap
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6 Linetypes and Use
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7 Cylinders, Centerlines and Hidden Edges 1. When do you include a centerlines? 2. How should they look? 3. What do you sketch if a centerline, hidden edge and  object line overlap? 4. Should you draw an edge where a cylindrical surface  blends with a flat surface?
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8 What is it? Object Lines Center Lines Hidden Edge Lines
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9 What is it? Object Lines Center Lines Hidden Edge Lines
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10 What is it? Counter Sink Hole Counter Bore Hole
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11 1. When do you include a centerline? p52  Graphics Concepts   Centerlines mark axis of rotation, center of cylindrical  parts
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12 2. How should they look? Long dash, short dash pattern Short dashes center at circle center CL extends beyond cylinder Draw if arc 180 º  or larger Optional if less than 180 º
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13 2. How should they look? Do NOT show an edge here when making a pencil drawing. AutoCAD automatically DOES add these tangent lines which you cannot easily remove.
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14 3. What do you draw if centerline, hidden edge  and object lines overlap? 1.
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This note was uploaded on 09/28/2008 for the course EN EN2 taught by Professor Forgot during the Spring '08 term at Tufts.

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EN2_F07_P04_CADGeo_Student - EN 2 Engineering Graphics and...

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