Project Development- Egg boiler
1. 1. Our team Chemical Device
In this section, you will briefly
describe your team's chemical device.
What it is. What problems will the
chemical device solve? And provide
a hand sketch of the chemical device.
What
it is:
Our chemical device is a soft-boiled egg maker. Its objective is to cook a quail egg till half-boiled and lift the egg up when done. The quail egg will be placed into a basket that is equipped with a temperature sensor to measure the temperature of the water in a container filled with hot water. The motor will lower down the basket filled with the quail egg according to the time delay set. This timer will run until a set time is up and the motor will be activated to reel in the basket.
Problems it will solve:
It is able to solve the inconvenience and inefficiency for users to cook soft-boiled eggs. First, it will solve the problem of making it automatic, so the user does not have to manually be in the kitchen to cook the egg and is able to focus on other kitchen duties. It will eliminate the problem of the user being unable to determine the temperature of the water to cook the egg with the help of a temperature sensor. Next, the user may overcook or undercook the egg so this maker is able to address that problem as it can cook a perfect soft half-boiled egg every time and can cook 2-3 eggs at a time. Lastly, it eliminates the problem of the tedious task of cleaning the stove and pot after cooking the egg
Hand sketch:
2. 2. Team Planning, allocation, and
execution
In this section, list down your team member's name.
Team Wasabi Group 3 Members:
1. Katrina (Chief Executive
Officer/ Team Leader)
2. Ashwati (Chief Operating
Officer)
3. Xin Ni (Chief Safety Officer)
4. Jun Lin (Chief Financial Officer)
Finalized BOM table
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Soft-boiled egg
maker |
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Team members: |
Ashwati, Katrina, Jun Lin, Xin Ni |
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Created by: |
Jun Lin |
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Date created: |
2/12/2021 |
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Date updated: |
18/2/2022 |
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BILL OF MATERIALS (BOM) |
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|
No |
Description of item |
Supplier (include hyperlink to the item in
website of seller) |
quantity |
quantity unit |
unit price |
Total cost |
Available at W319 Lab or FabLab? (Y/N) |
|
|
1 |
Temperature Sensor - Waterproof |
Cytron Marketplace
(https://sg.cytron.io/p-temperature-sensor-waterproof) |
1 |
pcs |
S$2.86 |
S$2.86 |
Y |
|
|
2 |
3kg.cm 360 Degree Continuous
Rotation Servo |
Cytron Marketplace
(https://sg.cytron.io/c-motor-and-motor-driver/c-dc-motor/c-servo-motor/p-3kg.cm-360-degree-continuous-rotation-servo) |
1 |
pcs |
S$10.86 |
S$10.86 |
Y |
|
|
3 |
Stainless Steel Sieve (Small) |
Mr DIY (https://www.mrdiy.com.my/default/stainless-steel-sieve-small-9064388-001001) |
1 |
pcs |
|
|
N |
|
|
4 |
Power Fishing string 0818A |
Mr DIY (https://www.mrdiy.com.my/power-fishing-string-0818a-9081771-001001) |
1 |
pcs |
|
|
N |
|
|
5 |
Arduino Maker UNO Plus Edu Kit |
Cytron
Marketplace
(https://sg.cytron.io/p-maker-uno-plus-simplifying-arduino-for-education) |
1 |
pcs |
S$21.43 |
S$21.43 |
Y |
|
|
6 |
Heat Resistant Cup |
|
|
|
|
|
N |
|
|
7 |
I2c 1602 Serial LCD for Arduino &RPI |
Cytron Marketplace (https://sg.cytron.io/p-i2c-1602-serial-lcd-for-arduino-and-rpi) |
1 |
pcs |
S$3.93 |
S$3.93 |
Y |
|
|
8 |
Power Bank |
|
1 |
pcs |
|
|
N |
|
Finalised Gantt Chart: HERE
Task Allocation
|
Project
Activity or Task |
By who |
Duration |
Date |
|
Discuss how
set-up should look |
Everyone |
2 days |
24/1 to 25/1 |
|
Discuss the
timeline of activities to be done |
Everyone |
1 day |
27/1 |
|
Program
individual components – temperature sensor, motor, LCD screen |
Jun Lin and
Xin Ni |
7 days |
27/1 to 3/2 |
|
Discuss specifications
of each component needed |
Everyone |
1 day |
31/1 |
|
Combine the
program for all components and ensure it works |
Jun Lin and
Xin Ni |
7 days |
3/2 to 10/2 |
|
Book Fablab
for laser cutting and 3D Printing machine |
Ashwati and
Katrina |
1 day |
3/2 |
|
Buy
components needed – metal basket and string |
Everyone |
1 day |
31/1 |
|
Design each
component to be laser cut and 3D printed in Fusion360 |
Ashwati and
Katrina |
1 day |
1/2 |
|
Design the
entire egg maker machine in Fusion360 |
Ashwati and
Katrina |
2 days |
1/2 to 2/2 |
|
Laser cutting
components - pillars |
Ashwati and Katrina |
3 days |
7/2 to 10/2 |
|
3D printing
components - cylinder |
Ashwati and
Katrina |
3 days |
3/2 to 10/2 |
|
Assembly of
components and programming into the machine |
Everyone |
2 days |
14/2 to 16/2 |
|
First testing
of soft-boiled egg maker |
Everyone |
1 day |
16/2 |
|
Final testing
- Adjustments to soft-boiled egg maker to ensure prototype works |
Everyone |
1 day |
16/2 |
1. 3. Design and Build Process
In this section, provide documentation
of the design and build process.
Part 1. Design and Build of Pillars and box (done by Katrina)
link to Katrina's blog: HERE
Part 2. Design and Build of Part B (done by ME)
Documentation for part 2.
Fusion of Cylinder between the 2
pillars
2.Extrude out circle to 12.5cm
3.Create a new circle of diameter 7.2mm in between the first
sketch and extrude out to 1cm.
4.Create another new circle of diameter 10.2mm around the previous
circle.
5.Extrude that circle out to 1cm.
6.On the other end of the cylinder, create a new circle with diameter 20.5mm
7.Extrude out to -0.2cm
8.Create a new line and draw the lines according to the lengths shown in the picture below from top view.
9.Create 2-point rectangle 5mm x 5mm
10.Use Ctrl/Shift key to select both rectangles and extrude out to 1mm.Then press finish sketch.
Fusion of Cylinder for Ball Bearing
1. Create a new sketch. Form a circle of diameter 0.3cm
2.Extrude the circle by 12.5cm
3.A cylinder which serves as a pole sticking through the
ball bearing is made.
3D Printing of the 2 cylinders
Cura Settings
Save the file from Fusion as stl file and open it in Cura
with the 3d printer set as Creality Ender-3 #2
Set the settings of layer height to 0.3mm and infill density
to 20%
Set the settings of print
speed to 100mm/s and add a raft as the cylinders being printed need support
so that it doesn’t roll off while printing.
3D printing machine SOP:
- Switch on the power supply and on
the switch of the 3d printer which is located at the back.
- Press the knob of the 3d printer
to turn the control panel on,
- Insert the filament into the
filament case and cut the filament at an angle.
- Press the prepare tab on the
control panel then press preheat PLA.Set the hot end of the nozzle to 200
degrees Celcius. Let the temperature rise to the set point.
- Press Disable stepper, then
select move and move Z.Turn the knob clockwise to around 25 mm above the
bed. This is to raise the bar.
- Press Disable stepper again.
- Insert filament into the printer
through the directed holes when the temperature has reached 200 degrees
Celcius.
- Press the lever to insert the
filament so that the 2 gears round the hole will open and the filament can
be inserted. Push the filament in while still pressing the lever.
- Once the filament starts to come
out through the end of the nozzle, cut the excess using a cutter.
- Transfer the gcode file saved in
the laptop to the micro-SD card
- Insert the SD card into the slot in 3d Printer and start to print the model.
Hero shot for task 2.
Part 3. Soldering of Temperature Sensor Wires to the Male
Jumper Wires (done by ME). Documentation for
task 3.
1. Test the conductivity of
the male jumper wires and the temperature sensor wires using the digital
multimeter to see whether the wires are alive or not.
2. Cut of about 2.5cm of the
insulation off the end of each wire using a penknife.
3. Insert a piece of
heat-shrink tubing onto the male jumper wires. Make sure it's long enough to
cover the splice and some of the insulation later on.
4. Twist the filaments of the temperature sensor wire and
jumper wires together to keep them orderly and behave as a single entity.
5.Heat the soldering tool to about 240 degree Celsius.While
waiting, put on some flux on the spliced wire to help the solder adhere
better.Make sure there is a thin layer of flux coated evenly on all the wires.
6. Get a leaded solder and melt the solder on the tip of the
soldering iron to prevent oxidation. Continue putting solder on the iron until
it has a shiny appearance. Be careful to not touch the soldering iron.
7. Hold the soldering iron against the bottom of the splice
to heat up the flux. The heat will transfer from the iron and into the wires so
that flux turns into a liquid Once the flux starts bubbling, we can begin to
add solder to the splice.
8.Run the tip of the solder on top of the wire so it melts
into the wires. Continue melting the solder until there’s a thin layer of
solder covering all the exposed wires.
Hero Shot for Task 3
Part 4. Programming of motor and lcd and temp sensor (done by XinNi & JunLin).
Link to XinNi's blog :HERE
Part 5. Wiring for the Arduino
components(done by XinNi)
Link to XinNi's Blog: HERE
Part 6. Integration of all parts and electronics (done by Everyone)
Documentation for integration:
1. Gather all the 3D printed, laser cutting components which are the faces of the pillars, box, cylinder, and rod
2. Tie the string through the strainer and attach it to the sides of the cylinder in between the knobs.
In This section describes the problems encountered in the design and build process and how the team solved them.
1. a) Programming the motor to turn clockwise, stop
and turn anti-clockwise
Solution: We did a lot of
research from various resources followed by trying out the codes and editing them
to fit our needs. So, from the research, we found that the “Attach” and “Detach”
commands work very well so we used them.
2. b) Programming motor to connect to the entire
Arduino code with LCD and temperature sensor
Solution: Since there was a problem in combining these
different codes, we had to do more trial and error by changing the wiring of
all the components and the Arduino Uno. From there we realized that the wire
was wrongly connected to PIN 13 and not the ground pin which caused all the
problems
3. c) Did not increase speed for 3d printing, takes a
long time to print
Solution: We had a chance to redo the 3d printing by
increasing the speed of the printer to 100mm/s.
4. d) Putting support in our cylinder covers the hole
for ball bearing, hole for the motor is not fully printed, and the bed adhesion is
only printed half the cylinder
Solution: After several checks on our design and settings in
CURA, it came to our knowledge that the particular Creality Ender 3D Printer
was not able to print out our design. So, to solve that issue, we changed the
3D printer to Ultimaker. By using this it gave us perfect coverage of the bed
adhesion. The holes on the cylinder were not covered too.
5. e) Our measurements were off by a few centimeters.
We predicted that it's because the sensitivity of the measuring equipment we
used (ruler) is not sensitive enough. we should have used a vernier caliper
Solution: We predicted that it's because the sensitivity of
the measuring equipment we used (ruler) is not sensitive enough. We should have
used vernier calipers to produce an accurate measurement.
2. 5. Project Design Files as downloadable
files
In this section, provide all the design files (Fusion360 files, .dxf files, .stl files, Arduino programs files) as downloadable files. You upload these files in one drive or google drive of your personal account. Each person must have these files. Always check that the links to download the files are working.
Add in FUSION Files (for Cylinder Rod), DXF
files (laser cutting), STL files (3d printing) (for Cylinder Rod), ARDUINO program files
Shared google file: HERE
Arduino Program Files: HERE
Box (DXF): HERE
Box(FUSION) : HERE
Cylinder(FUSION): HERE
Cylinder(STL) :HERE
Pillar 1(DXF) : HERE
Pillar 1(FUSION) : HERE
Pillar 2(FUSION) : HERE
Stick for ball bearing( FUSION) : HERE
Stick for ball bearing (STL): HERE
The embedded prototype link : HERE
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