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8/3/2019 Team2_VFood_Preliminary Design Document 02.12.2012
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GE401- Innovative Product Design & Development I
Preliminary Design Document
12/07/2011
Team 2
Seydi Afin nlEmirhan Akdemir
Cansu Acar
Melodi TrkiliOnur entre
Engin yidoan
Version: 1.0
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Contents
Introduction .................................................................................................................................................. 3
Block Diagram ............................................................................................................................................... 3
Description of Main Blocks and Their Relationships ..................................................................................... 3
Descriptions of Subassemblies...................................................................................................................... 5
Arduino Uno .............................................................................................................................................. 5
Stepper Motors ......................................................................................................................................... 5
Stepper Motor Drivers .............................................................................................................................. 5
Gas Compressor ........................................................................................................................................ 5
Cooling System Control Card .................................................................................................................... 5
UPS ............................................................................................................................................................ 6
Steel Case .................................................................................................................................................. 6
Pasta Tank ................................................................................................................................................. 6
Ingredients Tanks ...................................................................................................................................... 6
Bowl Slot ................................................................................................................................................... 6
Helical Mixer for Pasta .............................................................................................................................. 6
5 x Helical Mixers for 5 Ingredients .......................................................................................................... 6
Product Tree ................................................................................................................................................. 7
Interfaces ...................................................................................................................................................... 9
Bill Validator .............................................................................................................................................. 9
LCD Display ................................................................................................................................................ 9
Keypad .................................................................................................................................................... 10
LEDs ......................................................................................................................................................... 10
Output Slot .............................................................................................................................................. 11
Bowl Slot ................................................................................................................................................. 11
Software Structures .................................................................................................................................... 11
Conclusion ................................................................................................................................................... 12
References .................................................................................................................................................. 13
Appendix A. ................................................................................................................................................. 14
Appendix B. ................................................................................................................................................. 15
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Introduction
The aim of this report is basically to describe the main blocks of the MacQuick and the
relationships and interfaces between these blocks. It will be supported with the block diagram
and the software flowchart to illustrate the functioning of the product which also gives a more
clear understanding of the relationships between blocks. (See Appendix A,B)The product tree
will be given in the document which clearly indicates the needed components to build the
product completely and their quantity. In product tree, unique codes will be assigned to each
component to prevent any confusion in the process of building the product. So the preliminary
design document of MacQuick is also a guide in the process of assembling and turning a number
of components to a functioning MacQuick.
Block Diagram
Since in Preliminary Design Document it is aimed to define the components of MacQuick and
the relationships between them, it is a good idea to give the block diagram of MacQuick
beforehand. So that, the reader can easily follow the information provided in the report. The
block diagram is provided in Appendix A.
Description of Main Blocks and Their Relationships
There exixts basically 4 main blocks in the system. First main block can be titled as the user
interface block which consists of bill validator and keypad. Second block includes Arduino Uno
and can be named as the brain of the system. Main operations of the system; in particular, filling
the bowl with pasta and macaroni, is done in the third block. Last block is the cooling system.
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Descriptions of Subassemblies
The descriptions of the subassemblies which are the parts of user interface are provided in the
Interfaces title. So here, the rest of the subassemblies will be explained under separate sub
topics as follows.
Arduino Uno
Arduino Uno is a microcontroller card with the microcontroller ATmega328. It is used as the
brain of the MacQuick. It s responsible all the processes except cooling control that are explained
in detailed in the light of the flowchart in Preliminary Design Document of MacQuick.
Stepper Motors
Stepper motors are the motors that you can easily control how many degrees it will turn. This isimportant in our application since it is planned to control the amount of pasta and ingredients
with the number of turns of the helical mixers.
Stepper Motor Drivers
Even if stepper motors receive the command from Arduino Uno, Arduino Uno can not provide
enough current to start the motor movement. For the purpose of providing enough current to the
motors while not damaging any other component in the system, Stepper Motor Drivers are used.
So they basically provide enough current to the motors.
Gas Compressor
The pasta and the ingredients will be cooled to the 15 degree Celsius with the traditional vapor-
compression refrigeration. It consists of a gas compressor basically compresses the gas to the
pipes to keep the cooling process going.
Cooling System Control Card
As explained, cooling system will be controlled with a different microcontroller which will be
provided in the refrigeration system itself . It has a temperature sensor and an ADC in it and the
controller card sends the command turn on the gas compressor if the current temperature is
above 15 degree Celsius and sends turn off command if the currently measured temperature is
below 15 degree Celsius.
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UPS
Uninterruptible Power Supply (UPS) will be used to supply the system if any power cut situation
happens. Also it will prevent the system from the harmonics which means transient ripples that
may occur in the input current. In brief, UPS enables system to maintain its durability.
Steel Case
To prevent any breaking in attempt, the case of the MacQuick will be steel.
Pasta Tank
This tank is a part of the internal mechanical structure and it keeps all the pasta inside it. Since
MacQuick will not be refilled in the middle of the day, it will be big enough to store enough
pasta for one day. It will be a inverted conical shaped tank so that the macaroni will constantly
tent to move down where the empty blow is.
Ingredients Tanks
Ingredients tanks are again inverted conical tanks due to the same reason. However, it will be
relatively smaller than the pasta tank.
Bowl Slot
In the vending process it is expected the user to take a empty bowl from the bowl slot and place
into the output box. So we are providing the user the empty bowls in the bowl slot. Bowl slot is a
slot near the output slot where the user can take an empty bowl by just applying a small force
downwards like in the electric water fountains. It can
Helical Mixer for Pasta
As stated, the mechanical component to drop the pasta and the ingredients will be a helical
mixer. By turning it for a specific angle, a specific amount of pasta will be dropped.
5 x Helical Mixers for 5 Ingredients
The helical mixer to use for ingredients will be smaller ones of the pasta version. Since
MacQuick offers 5 different ingredients, there are 5 same sized helical mixers for each
ingredients.
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Product Tree
According to VFood component numeration system all components of MacQuick numerated as
follows:
1 x x x x x --> MacQuick1 0 x x x x --> MacQuick Internal Structure
1 0 1 x x x --> MacQuick Internal Structure - Electrical Components
1 0 2 x x x --> MacQuick Internal Structure - Cooling Components
1 0 3 x x x --> MacQuick Internal Structure - Mechanical Components
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Bill of Material
Table 1: Bill of Material for MacQuick except Cooling Unit
Assembly Stock Number Assembly Part Description
100000 MacQuick
Stock Number Part Describtion Number Used
101001 Arduino Uno 1
101002 LCD 1
101003 Keypad 1
101004 Bill Validator 1
101005 Stepper Motor 6
101006 Motor Driver 6
101007 Adapter 1
101008 LED 12
102000 Cooling unit 1
103001 Steel Case 1
103002 Pasta Tank 1
103003 Ingredient Tank 5
103004 Bowl Slot 1
103005 Helical Mixer for Pasta 1
103006 Helical Mixer for Ingredients 5
Drawing no Prepared by Checked by
100000 - BOM Emirhan Akdemir Seydi Afin nl
Assembly Part
Description Date
MacQuick 12.08.2011
Table 2: Bill of Material For Cooling Unit of MacQuick
Assembly Stock Number Assembly Part Description
102000 Cooling unit
Stock Number Part Describtion Number Used
102001 Gas Compressor 1
102002 Control Card 1
102003 ADC Block 1
Drawing no Prepared by Checked by
102000 - BOM Emirhan Akdemir Seydi Afin nl
Assembly Part
Description Date
Cooling Unit 12.08.2011
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Interfaces
This section includes all user interface components specifications. There are 5 different of user
interface components in MacQuick:
Bill Validator
The first interface component is bill validator which is used by customers to give an input to the
machine. G-13.mft is used as bill validator.Bill validator is the component that counts the money
that user pays and sends the money is paid signal to the microcontroller. It has a small slot that
takes the coin money as input and a locked small case that keeps the paid money inside.
Figure 1: Bill Validator
LCD Display
LCD display is main interface component that is used to show messages to users. It is standard
4x20 LCD that is used with a micro-controller easily. Total credit of the customer, problem
messages, informing messages such as the the message shown when the macaroni is ready, are
displayed through LCD screen.
Figure 2: LCD
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Keypad
Keypad is another main interface component that is used to take inputs from users. It simply
consists of several number of hard buttons. Customer chooses ingredients by pressing the related
buttons on keypad. If an ingredient button pressed inadvertently by a customer, this can be easily
compensated by pressing the Clear button. After the ingredients are chosen, the customer
presses the Give me my Macaroni button and the process of preparing the macaroni starts.
Figure 3: Keypad
LEDs
LEDs are placed to show current status of all ingredient stocks including macaroni stock. All
these LED need to be labeled accordingly. For each ingredient, there exist two LEDs, red and
green one. Green one indicates that the specific ingredient exists in stocks and available for
customers, whereas red one indicates that the ingredient has ran out of stock.
Figure 4: LEDs
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Output Slot
Main output interface of MacQuick is this output slot. It is the place that MacQuick fills the bowl
that is placed. In order to avoid unwanted situations, this slot has a sensor that monitors the bowl
before the macaroni filling process's beginning. It needs to be big enough for bowl. Also it has a
grate that is placed at the bottom of this component. User puts the bowl to this slot and wait for
the machine to complete the macaroni making process and takes the bowl with a macaroni from
there.
Bowl Slot
This slot simply has bowls on it and the only thing user should do is taking bowl on it. Further
information is provided under Descriptions of Subassemblies topic.
Software Structures
The main software related component of system is Arduino UNO board. Its language is based on
C/C++. On the other hand, it has lots of open source libraries written by Arduino community that
enables users to use other programming languages and development environments. Also it is
allows the use of any ofAVR Libc functions. It is a subset package of standard C library used for
Atmel AVR 8-bit RISC microcontrollers. Development environment is also provided by the
Arduino community. The open sourced Java based Arduino environment makes us to implement
and upload the code to the board. It is multi platform software that runs on Linux, Mac OS X and
Windows so there is no need to install any virtual machine to run the software.
The software flowchart that will be implemented is provided. (See Appendix B) The software
flowchart of MacQuick is explained. The complete vending process is given step by step in
following.
http://www.nongnu.org/avr-libc/user-manual/modules.htmlhttp://www.nongnu.org/avr-libc/user-manual/modules.htmlhttp://www.nongnu.org/avr-libc/user-manual/modules.htmlhttp://www.nongnu.org/avr-libc/user-manual/modules.html8/3/2019 Team2_VFood_Preliminary Design Document 02.12.2012
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1. When the ingredients are filled and the MacQuick is plugged in the machine starts. When it is
filled, the amount of ingredients is set to full.
2. First, ingredients in each slot are checked. If there is a missing ingredient, the status is set to
missing and a specific LED is turned to red. If not, it writes Ready to LCD.
3. And start to wait for someone to come and pay for the macaroni. When the sufficient amount
of money is paid it moves to step 4 given below.
4. MacQuick starts to wait user to push the specific ingredient button or done button which
means the user finished to choose ingredients and s/he wants the macaroni.
5. If ingredient button is pushed, the ingredient is displayed in LCD. Increase the counter of the
ingredient. And if user wants any more ingredients, s/he just presses the button of it and the same
process repeats. If user pushes Give me my macaroni button, program moves to the step 6
6. Presence sensor checks whether there is an empty bowl is placed into the output box or not. If
not wait until the bowl is placed. If it is placed, the macaroni preparation process begins.
7. Write Preparing in LCD until the preparing process is completed. When it is done the
process is repeated from the beginning. And again checks ingredients.
Conclusion
In Preliminary Design Document the main blocks and subassemblies are described and their
relationships are explained. The block diagram of the MacQuick is provided in the Appendix A
because it gives a general overview to the all the components and their connections which is the
main discussion of this report. The software flowchart and the explanation of the vending
process step by step also gave a further illustration of the blocks and their relationships. The
product tree is also created. First the whole product, MacQuick is divided into 3 parts whcih are
Electrical Components, Cooling System and Mechanical System then the subassemblies
are listed under these blocks. Each subassembly is given a unique number and this creates a
common language that everybody will understand in the light of our product tree.
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References
1. Arduino Uno. arduino.cc.http://www.arduino.cc/en/Main/ArduinoBoardUno
2. Back UPS-Pro. apc.com.http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BR700G&tab=models
3. EasyDriver Stepper Motor Driver. sparkfun
.com. http://www.sparkfun.com/datasheets/Robotics/A3967.pdf
4. Small Refrigeration Compressor. alibaba.com.http://www.alibaba.com/product-
gs/397489299/small_refrigeration_compressor_GFF86AA_R134a.html?s=p
5. Specification for LCM Module. es.co.th.
http://www.es.co.th/Schemetic/PDF/ABC020004B21-BIW-R-01.PDF
6. Step Motor. sparkfun.com. http://www.sparkfun.com/datasheets/Robotics/SM-42BYG011-
25.pdf
7. PIC16C5X. microchip.com.http://ww1.microchip.com/downloads/en/DeviceDoc/30453b.pdf
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Team2_VFood_Preliminary Design Document 02.12.2012
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Appendix A.
8/3/2019 Team2_VFood_Preliminary Design Document 02.12.2012
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Appendix B.