Lecture 3 Flashcards
1
Q
When was the first numerical manufacturing system?
A
1957
2
Q
Pros of CAD deign.
A
The move from paper drawings to using a computer is
relatively simple
• Electronic sketches and drawings are much easier to share
• Digital 2D CAD designs are much easier to amend,
accommodating changes in the design.
3
Q
Cons of CAD design
A
• Many 2D tools are designed for creating engineering
drawings rather than concept design work
• 2D CAD drawings cannot be relied on for digital prototyping
and they cannot be used at all for rapid prototyping.
4
Q
What is a geometric constraint?
A
Non-numeric geometric relationships that the user
assigns to sketched elements
5
Q
Dimensional Constraints
A
- Distances between objects
- Sizes of arcs and circles
- Angles between objects
