Introduction to Engineering Introduction to Isometric Ellipse Agenda

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Introduction to Engineering Introduction to Isometric Ellipse Agenda: l. Sketching of ellipse for isometric

Introduction to Engineering Introduction to Isometric Ellipse Agenda: l. Sketching of ellipse for isometric drawings l. Introduce concepts and conventions of multi-view projections l. Reference: IGCE, Chap 2: 2. 4. 2

Recall – Before starting Bike Lab 1 we developed an approach to doing an

Recall – Before starting Bike Lab 1 we developed an approach to doing an isometric projection Today - Build on that base and learn how to do circular features (holes and cylinders) in an isometric projection

Review l Sketch an isometric of this object D H W l Start with

Review l Sketch an isometric of this object D H W l Start with a block with dimension W, H, D l “Cut away” material you don’t need

Isometric ellipses l In an isometric drawing, the object is viewed at an angle,

Isometric ellipses l In an isometric drawing, the object is viewed at an angle, which makes circles appear as ellipses. l Holes l Cylinders

Ellipses can be in any of three planes

Ellipses can be in any of three planes

Sketching an Isometric of a Hollow Pipe

Sketching an Isometric of a Hollow Pipe

Step 1 - Creating the Base Box Diameter Length

Step 1 - Creating the Base Box Diameter Length

Step 2 – Ellipse on Front Face - corner to get center - lines

Step 2 – Ellipse on Front Face - corner to get center - lines to tangent points Tangent Points Lines to Tangent Points

Step 3 – Ellipse on Front Face Sketch in Arcs Tangent Points

Step 3 – Ellipse on Front Face Sketch in Arcs Tangent Points

Step 3 – Ellipse on Back Face and Profile Repeat for ellipse on rear

Step 3 – Ellipse on Back Face and Profile Repeat for ellipse on rear face Draw Tangent Lines for Profile Complete Visible Part of Back Ellipse

Step 4 – Ellipse for Hole on Front Face Create Box for Hole Sketch

Step 4 – Ellipse for Hole on Front Face Create Box for Hole Sketch Ellipse

Isometric of Hollow Pipe

Isometric of Hollow Pipe

Example

Example

Assignment #3: Isometric Sketch l Complete the isometric sketch of the object below:

Assignment #3: Isometric Sketch l Complete the isometric sketch of the object below: