Welcome to the Lassonde Design Club Promoting Design Skills and Practices

What is Engineering Design? Politics Sociology, psychology Economics Industrial Design Architecture Art Engineering Science Science Engineering Technology Production Engineering Design

What is Design? Design is: a systematic intelligent generation and evaluation of specifications for artifacts whose form and function achieve stated objectives and satisfy specified constraints (Dym and Little) More Art than Science Science proceeds by laws (often mathmatical) Art proceeds by intuition, experience and feeling Still must follow the laws of nature

Systematic Approach Requirements for a systematic design methodology: Be applicable to every type of design activity Foster inventiveness and understanding Be compatible with other disciplines Not rely on chance Facilitate the application of known solutions Be compatible with electronic data processing Be easily taught and learned Reflect the findings of psychology and ergonomics Emphasize the objective evaluation of results

Systematic Approach Planning and Clarification Conceptual Design Embodiment Design Detail Design TASK PRINCIPLE SOLUTION (CONCEPT) PRELIMINARY LAYOUT DEFINITIVE LAYOUT PRODUCT DOCUMENTATION REQUIREMENTS LIST (DESIGN SPECIFICATION) SOLUTION

Task Where do Design Requests come from? Internally Marketing/Product Planning Department Customer Service Manufacturing Department Externally Customer Contract TASK PRINCIPLE SOLUTION (CONCEPT) PRELIMINARY LAYOUT DEFINITIVE LAYOUT PRODUCT DOCUMENTATION REQUIREMENTS LIST (DESIGN SPECIFICATION) SOLUTION

Reference Material

Component Highlight Stepper Motor

Stepper Motors Stepper Motors are a type of DC Brushless Motor A full rotation of the motor is broken up into a number of steps The motor can be commanded to move and stay at any of these steps without feedback control (open-loop)

Stepper Motors Advantages: Easy to control Has full torque at a standstill Very repeatable positioning (~3-5% of a step size) Disadvantages: Difficult to operate at high speeds Relatively low accuracy (especially under load) Low power relative to similarly sized other motors

Stepper Motors Where are they used? Generally used for positioning applications where loads are low Examples: Floppy disk drives Scanners CD drives CNC Machines 3D Printers