Gears and CAM Systems
A gear placed in between 2 other gears to cause them to turn in the same direction without changing their gear ratio.
What is an idler gear?
The first of the C's which determines the range of conditions that a system can operate within. Several Important examples include power, spatial, and sequence of operation.
What are constraints?
A decision method which involves determining whether or not ideas are better than, the same as, or worse than a datum design in several criteria.
What is a Pugh Chart?
An individual or group who is interested or affected by your product.
What is a stakeholder?
3 Examples of ways to encourage creativity.
- bouncing ideas off of someone
- changing physical environment
- physical movement
- spending time in nature
- getting off screens
- extending functionality of a product
A gear system in which the gear ratio changes depending on which part you hold.
What is a planetary gear system?
The second C which refers to how assemblies are arranged and connected. One way to optimize this C is through modules which are contained units, designed separately to perform a specific task in the larger system.
What are constraints and architecture?
A decision method that involves ranking the importance of criteria before ranking different designs in said criteria.
What is the weighted objectives method?
A method for gathering stakeholder needs which involves creating a fake customer in your mind to determine needs and wants for the project.
What is personas?
A type of ideation techniques that involves making connections to inspire other ideas.
What are associative techniques?
If we have conjugate action between two
meshing gears, then we have a constant
angular velocity ratio.
What is the Fundamental Law of Gearing?
This controls the flow of energy, material, and information between components.
What are connections and interfaces?
3 reasons why decision methods are useful.
- provides a structured way to discuss disagreements
- can speed up the decision making process
- ensures that everyone is heard
- makes for a more objective discussion
- helps differentiate between ideas you like and useful ideas
The six qualities that make a good engineering requirement.
What is correct, feasible, necessary, unambiguous, verifiable, and open.
A chart which involves thinking of and drawing several different ways to accomplish a specific tasks within a system.
The 4 types of cams you can use in a design.
What are plate cams, wedge cams, cylindrical cams, and globoidal cams?
The C which involves the make/buy decision which is where you must decide on whether you will make a component or outsource it.
What is define components?
3 cons of the weighted objectives method.
- Hard to keep constant reference or baseline between ideas
- can be challenging if unfamiliar with concepts
- provides more spread on results
- can give the impression that there is a clear "winner" among designs
What is wrong with the following engineering requirement:
The device should be able to survive extreme temperatures and weather conditions.
- Should be replaced with shall or must
- survive is ambiguous and hard to verify
- there are two requirements in one
A type of ideation techniques which involve getting inspiration for your design from nature, patents, and existing products.
The angle that affects how much force is transmitted along the radial and axial directions of the shaft of a gear.
What is the pressure angle?
A self-contained unit which performs a specific function in a larger system. Allows producers to reduce the number of parts and interfaces in a product, simplifying the design.
What are modules?
3 rules for the criteria you use during your decision making process.
- They should connect with your engineering requirements and stakeholder needs
- Criteria must be broad enough to compare concepts to
- Criteria must be something on a scale or spectrum
What is a house of quality?
The seven rules of brainstorming.
Defer judgement, encourage wild ideas, build on the ideas of others, stay focused on the topic, one conversation at a time, be visual, go for quantity