## ENG 004 Lecture 12, Nov 6, 2012

### Announcements

• Lecture schedule updated
• Homework #5 available after class
• Homework submission changes
• Office hours

### Topics

• 3D Constraints: sketch planes/assemblies
• Projection theory

## Midterm Overview - Stats

Mean Std Median Max Min
Problem 1 15.450000 1.982486 15 20 10
Problem 2 9.041667 1.692275 10 10 2
Problem 3 11.633333 7.368948 12 20 0
Problem 4 18.141667 4.654980 19 24 4
Problem 5 21.975000 4.785241 23 26 0
Total Score 76.241667 14.272849 77 98 29

## Assembly Constraints

### Mate

Two surfaces associated with difference objects are set coplanar with directional vectors in opposing directions

### Align (Flush)

Two surfaces associated with different objects are set coplanar with directional vectors in the same direction

## Assembly Constraints

### Offset

Same as Mate/Align except the planes are not coplanar but parallel, with an offset distance between them

## Assembly Constraints

### Align Axis

Axes of two parts are constrained to be colinear

## Assembly Constraints

### Tangency

Two surfaces are constrained to be tangent to each other either at a single point or along a line.

## Assembly Constraints

### Angluar

Two planes are angled relative to each other.

## Projections

Rotated about one or two axes relative to the picture plane.

Sections 7.2-7.8

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