Blog Entry 6 ( Week 13 + Practical 4)

Hey guys it's me Eshvin, I have recently just uploaded my blog on my journey in 3D printing and egg challenge✅. If you have not read it, please do check it out.😊

For this week's blog, I will be talking about week 13's lesson which is Operating Principles & Mechanism🛠 and I will be talking through my journey in Practical 4 where my group and I had to design and build a cardboard structure that incorporates a manually operated mechanism to keep a marble in continuous motion for at least 30 seconds😯.

Operating Principle and Mechanism Design

Operating Principle

All devices, apparatus, and equipment are designed based on working principles that are either mechanical, electrical, chemical or magnetism.

Examples of operating principles;

• Steam traps operate on the principle of specific gravity

• Foil shavers work based on reciprocating motion

• Air-lift pump (such as the one inside a coffee maker) works on the principle of buoyancy

• Brewing coffee involves the leaching of coffee solubles

• Centrifugal pumps impart energy to the liquid by means of a centrifugal force developed by the rotation of an impeller.

Mechanism Design

Mechanism design enhances and enables principle. In order for the identified operating principle to work efficiently, mechanical movements are often required.

In Chemistry🧬, the mechanism is the fundamental chemical processes

involved in or responsible for an action, reaction, or other natural

phenomenon.

In Engineering⚙️, however, mechanism refers to the combination of rigid or resistant bodies, formed and connected so that they move with definite relative motions with respect to one another. More simply, it is something that transforms forces and movement into a desired set of output forces and movement.

6 Essential Mechanism in functional prototypes

Actuators

converts stored energy into motion

Cams

convert the rotation of a shaft into simple or complex reciprocating linear motion

Gears

transmit torque and adjust rotational velocity

Lever

transmit and amplify force by fixing the input and output about a fulcrum or pivot point

Ratchets

lock in one direction, allowing them to tighten without fear of literally "going backward."

Springs

store and dissipate energy

CA2 Report Part 4 Mechanism Design

For CA2 Report Part 4, my group was tasked to design a ping pong (table tennis) ball launcher that can shoot and reload ping pong balls and the device should be able to hold at least 5 ping pong balls.

The sketches below were made by my group and me;

My Sketch:

Valerie Sketch:

Asraf Sketch:

Insyirah Sketch:

Clearly, my sketch is not that great and asraf's one also so it comes down to Valerie and Insyirah.

We have chosen Valerie's sketch as although her sketch and insyirah's one are the same, in terms of aesthetics wise Valerie's one looks better😂.

This is the video that shows the gun Valerie sketched out in action🔫

CA2 Report Part 4 Mechanism Design

Practical 4

for practical 4, my group and I were tasked to design and build a cardboard structure that incorporates a manually operated mechanism to keep a marble in continuous motion for at least 30 seconds.

A week before the practical, my team and I had a meet-up to plan our design.

During that meet-up, we researched videos online for inspiration.

We then came across two videos that we were keen🤩 on making.

The mechanism we chose to use is a double crank locomotive mechanism which has been primarily used as a coupling between two parallel non-inline shafts generating nonuniform motion of the driven shaft. This non-uniformity of the continuous output rotation makes the double-crank mechanism a versatile input source.

Design Sketches

My Group's Finalised Design:

Mechanism (will be joined with a connecting rod behind the spiral base):

Photos📸 of the fabrication process

Gluing the spiral to its cardboard base

Gluing the sides of the slope

Gluing the slope to the back of the spiral base

Hero👑 shot of the finished product

Video📹 of the product in operation

WELLLLLL my group's product was successful🎉🎉

Initially we were concern🤔 about the crank as we can only use cardboard materials to make the product and for the fixed link we had to use cardboard materials instead of a string.

The crank did failed at first and it was because the width of the cardboard that replace the string was too big.

Then for the second try, we shorten the width of the cardboard and it WORKED💪🏻💪🏻

SP STUDENTS I NEED YOUR HELP👀👀

If you like my group's cardboard design and want to see it in operation,

visit the lab at W319 and please vote for us🙏🏻🙏🏻

That is it for my blog!

Really hope that you enjoy reading it😃

STAY TUNEE FOR MY NEXT BLOG AND HAVE A GREAT ONE!!!!!