Review

	Definitions
		Machine
			A collection of components that effectively transmit or transform forces, energy, motion, or loads for a specific purpose
		Design
			Applying mathematical and scientific principles in order to produce useful devices and processes
		Machine Design
			Calculating motions, forces, and or energy in order to size, specify geometry and materials for a collection of interrelated components that work safely and effectively together for a specific purpose

The Design Process

	A need must exist for the machine
	Search for existing machines that may fulfill the need; search for information that may be useful in the design
	State the function and goals for the machine
	Outline the criteria and constraints of the design
	Begin ideation and invention stage (synthesis)
	Analyze the resulting design
	Select machine components
	Detail the design with drawings and specifications
	Build and test the prototype
	Produce the design

Establishing a need

	Design a pogo-stick for use by small children

Conduct a search for existing designs

	Name 5 Places that you would search for possible existing designs
	1
	2
	3
	4
	5

Insert functions and goals for the page turning device

	Functions:
	Goals:

Criteria and constraints

	Constraints:
	Criteria:

Begin synthesis

	Work in groups of three or four and begin sketching your proposed design
	Include as many details as you have time
	Anticipate what types of analysis would be necessary to demonstrate that all design constraints are met.
	Iterate as you have time between now and our next meeting

Analyze design

	Look at critical loadings
	Make and clearly state important assumptions
	Size parts and establish geometry based on what loading analysis suggests
	Specify materials based on loadings

Select component parts

	Any parts from stock will greatly reduce cost
	Any required machining will increase cost

Detail the design

	parts drawings
	assembly drawings
	dimensions
	tolerances

Build, test and take into production

	Are there manufacturing concerns?
	What testing conditions should be set up?
	How much testing is warranted?
	How do we establish a factor of safety for this type of device?