Team2_VFood_Subassembly Specifications Document 02.12.2011

8/3/2019 Team2_VFood_Subassembly Specifications Document 02.12.2011

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GE401- Innovative Product Design & Development I

Subassembly Specification Document

12/09/2011

Team 2

Seydi Afin nlEmirhan Akdemir

Cansu Acar

Melodi TrkiliOnur entre

Engin yidoan

Version: 1.0


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Contents

Introduction ................................................................................................................................................... 3

Subassembly Descriptions, Functions and Specifications ............................................................................ 3

Arduino Uno ............................................................................................................................................. 3

Physical Specifications ......................................................................................................................... 3

Electrical Specifications:....................................................................................................................... 4

Software Specifications......................................................................................................................... 5

Stepper Motors .......................................................................................................................................... 5

Stepper Motor Drivers .............................................................................................................................. 6

Bill Validator ............................................................................................................................................ 7

Physical Specifications ......................................................................................................................... 7

Electrical Specifications ........................................................................................................................ 7

Software Specifications......................................................................................................................... 7

LCD Display ............................................................................................................................................. 8

Keypad ...................................................................................................................................................... 8

Gas Compressor ........................................................................................................................................ 9

Cooling System Control Card ................................................................................................................. 10

Physical Specifications: ...................................................................................................................... 10

Electrical Specifications:..................................................................................................................... 10

Software Specifications: ..................................................................................................................... 10

UPS ......................................................................................................................................................... 11

Steel Case ................................................................................................................................................ 12

Pasta Tank ............................................................................................................................................... 12

Ingredients Tanks .................................................................................................................................... 13

Bowl Slot ................................................................................................................................................ 13

Helical Mixer for Pasta ........................................................................................................................... 14

5 x Helical Mixers for 5 Ingredients ....................................................................................................... 14

6xGreen and 6xRed LEDs ...................................................................................................................... 15

Subassembly Product Tree .......................................................................................................................... 16

Conclusion .................................................................................................................................................. 17

References ................................................................................................................................................... 18

Appendix A. ................................................................................................................................................ 19


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Introduction

In subassembly specification report, the aim is to specify the subassemblies that are required to

build MacQuick. Descriptions, functions and specifications of each sub-parts of product are

explained. Specifications of product includes electrical specifications (such as operating voltage,

output current, torques, power) and physical specification (such as dimensions, operating

temperatures, shapes). In addition to them, connections and protocols between subassemblies are

clarified throughout report. Block diagram, product tree and software flowchart are also added to

report as appendix.

Subassembly Descriptions, Functions and Specifications

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 the cooling system that are

explained in detailed in the light of the flowchart in Preliminary Design Document of MacQuick.

Arduino Uno has 14 Digital input/output pin. It has also 6 analog inputs (Figure 1). The crystal

oscillator that is used in it is 16MHz. It has a USB port. The software is installed to the

microcontroller via USB port. It has a power jack, ICSP header and a reset button. Further

technical specifications are given in the list given below.

Physical Specifications

The maximum length and width of the Uno PCB are 6.8cm and 5.3cm respectively. It consists

of 4 screw hole to attach the Arduino Uno to a surface. The range that Arduino Uno is functional

is between +10C TA +40C.


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Figure 1: Arduino Uno Front View

Electrical Specifications:

Microcontroller ATmega328

Operating Voltage 5V

Input Voltage (recommended) 7-12V

Input Voltage (limits) 6-20V

Digital I/O Pins 14 (of which 6 provide PWM output)

Analog Input Pins 6

DC Current per I/O Pins 40mA

DC Current for 3.3V Pin 50mA

Flash Memory 34KB (ATmega328) of which 0.5 KB used by

bootloader

SRAM 2KB(ATmega328)

EEPROM 1KB(ATmega328)

Clock Speed 16MHz


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Software Specifications

Arduino Uno communicates with a computer serially over USB. It uses standard USB COM

drivers. The Arduino software includes a serial monitor which allows simple textual data to be

sent to the Arduino Uno and this is how the code is installed on the microcontroller.

Arduino Uno can be programmed with the Arduino software. It also has a different programming

language. 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 of AVR 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.

Stepper Motors

As described before, stepper motors are used to turn the helical mixers in order to pour the

enough amount of pasta into the bowl. Sparkfuns stepper motor is used in MacQuick and its

specifications are given below.

COMMON

RATING

ELECTRICAL

SPECIFICATIONS

DIMENSIONS

Step angle: 1.85 Voltage: 12V Height: 6cm

Phases: 2 Current: 0.33A Width: 4cm

InsulationResistance:

100Mohm(500VDC) Resistance: 34%10 Depth: 4cm

Weight: 0.2Kg Inductance: 46%20Mh

Holding torque: 0.23N.M
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.htmlhttp://www.nongnu.org/avr-libc/user-manual/modules.html


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Figure 2: Stepper Motor

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. EasyDrivers A3967 will be used in

project and this stepper motor driver is designed to control one bipolar stepper motor. It provides

7V-30V and maximum 0.75 amperes for each coil in motor. In the case of emitting more

amperes than providing, motor driver can fix ampere in 0.75 amperes by using ampere regulator.

A3967 have 13 pins and four pins will be used to control stepper motor. There are two pins

(direction, step) which can be assigned to arduino uno; however, we will only use step pin of

motor driver because stepper motor will turn in one direction. Specifications are given in table :

Load Supply Voltage: 7V-30V

Max Output Current: 0.75A

Logic Supply Voltage 7V

Maximum Wake-up Time 1ms

Dimensions 20x50x3 mm

Controller A3967SLBT


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Figure 3: Stepper Motor Driver - EasyDrivers A3967

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.

Physical Specifications

Dimensions 102 x 89 x 52 mm

Coin Diameter 1.5 - 31.5 mm

Coin Thickness 1.5 - 2.5 mm

Operating Temperature -20oC up to 70

oC

Electrical Specifications

It uses 12-24VDC 10% as power supply.

Software SpecificationsThe NRI G13.mft is able to be taught up to 8 coins/tokens as standard.

It uses WinEMP software for downloading complete device and coin configuration.

Some of the interfaces that are used are serial s1, serial MDB, ccTalk, USB connectiton.


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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.

Messages shown on LCD is determined by Arduino Uno. LCD and Arduino communicate using

HD44780 protocol.

Supply Voltage: 5V%20 Height: 5cm

Supply Current: 3mA Width: 9cm

Operating Temperature: -20C / 70C Depth: 1cm

Figure 4: LCD

Keypad

Keypad enables user to choose the desired ingredients and keypad directly connects with

Arduino Uno. There will be seven buttons in keypad as indicated requirement report. The

operating voltage is 5V and Arduino Uno serves as voltage supply for keypad. Data is send

serialy from keypad to Arduino Uno and keypad library is used for implementation. Further

specifications are given below.


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Operation Voltage 5V

Operating Temperature -20C / 50C

Dimensions 70x120x5 mm

Number of Output Pins 3 (one of pins is serial connection)

Figure 5: The Keypad of MacQuick

Gas Compressor

The pasta and the ingredients will be cooled to the 15 degree Celsius with the traditional vapor-

compression refrigeration. Macquick consists of a gas compressor which basically compresses

the gas to the pipes to keep the cooling process going. Gas compressor will be controlled by

cooling system control card. The operating voltage of compressor will be 220V-240V and the

cooling capacity is approximately 250W. All specifications of gas compressor are indicated

below;

Supply Voltage 220V-240V

Cooling Capacity 250W

Displacement 9cm3

Dimensions 100.5x113.5x184 mm

Cooling Type Static Cooling


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Cooling System Control Card

As explained, cooling system will be controlled with a different microcontroller card based on

PIC16C58A 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. Since this will be taken from a mini

refrigerator already coded and designed. So as a subassembly, we are interested in not the

specifications of the PIC16C58A in a detailed way but the specification of the complete control

card.

Physical Specifications:The length and width of the cooling system control card is 16cm and 14 cm respectively. It

consists of 4 screw hole to attach the it to a surface. The range that it is functional is between

+10C TA +40C.

Electrical Specifications:

Supply Voltage 3 - 6V

Supply Current 1.8 - 3.3 mA

Operating Frequency 4MHz

Software Specifications:

The PIC16C58A in the cooling system control card is preprogrammed and we will not reprogram

it again. We may just make some small changes to adjust the critical temperature that it chages

the state of the gas compressor from on to of or vice versa.


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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. The

capacity of the UPS is 700VA/490W and it specifications are given below.

Output Input

Output power capacity: 420 Watts/700 VA Nominal Input

Voltage:

120 V

Nominal output

voltage:120V Input Frequency: 50/60 Hz3%

Efiiciency at full load: 78% Cord Length: 1.83 m

Waveform Type: Stepped approx. to sinewave Maximum inputcurrent:

12 A

Baterries & Runtime Physical

Included batterymodules:

1 Height: 190 mm

Typical recharge time: 12 hours Width: 91 mm

Backup time: Given in the figurebelow

Depth: 310 mm

Operating temperature: 0C / 40C Weight: 8 KG


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Figure 6: Load vs. Backup Minutes Characteristics of UPS

Steel Case

To prevent any breaking in attempt, the case of the MacQuick will be steel. Steel case can be

thought as a rectangular prism with dimensions 180cm(height)x80cm(width)x80cm(depth).

Weight of the steel case is about 90kgs. Since all the internal structure will be mounted on steel

case,

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. It will be made of steel which will not give a bad

taste to the pasta inside it. The volume of the pasta tank is determined as 58434cm

3

and theamount of pasta to be dropped into bowl is 971cm

3so a full macaroni tank can serve up to 60

bowl of macaroni. The exact sizes of the pasta and the macaroni tanks are given in Figure 5.


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Figure 7: a. Pasta Tank - b. Ingredients Tank

Ingredients Tanks

Ingredients tanks are again inverted conical shaped tanks due to the same reason. However, it

will be relatively smaller than the pasta tank. It will be made of steel which will not give a bad

taste to the pasta inside it. The exact volume and the sizes of the ingredients tanks are given in

Figure 5.

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. Bowl slot is integrated to inside of MacQuick by

using screws. Bowl slot will be cylindrical and plastic. User will draw bowl from bowl-slot.

There will be approximately 150 bowl in bowl slot. Dimensions of bowl slot are determined in

accordance with required number of bowl.

Dimension of bowl (frustum) : top radius 15cm, bottom radius 12cm, height 12cm

Dimension of bowl slot (cylinder) : radius 16cm, height 80cm


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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. The exact

sizes of the helical mixers are given in Figure 6.

Figure 8: The Model of the Helical Mixer for Ingredient and Pasta

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. The exact sizes of the helical mixers are given in Figure 6.


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6xGreen and 6xRed LEDs

Since there are 5 ingredients and the macaroni pasta tanks, here are total 12 LEDs in MacQuick.

Green LEDs stand for there are enough amount of the ingredient or pasta in the tanks and red

LEDs stand for that specific ingredient or pasta has ran out of so that the user know what

ingredient s/he can not choose beforehand.


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Subassembly Product Tree

1 x x x x x --> MacQuick

1 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 Components1 0 3 x x x --> MacQuick Internal Structure - Mechanical Components


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Conclusion

In previous reports, we mainly focused on whole structures by evaluating requirements of

product. After implementing block diagram and software chart, we became to look sub-units of

product and with this report we state all specifications and designs of subassemblies ofMacQuick. Before documentation of this report, subunits had been analyzed and market

researches had been done; hence, subassembly specification report also improve our perspective

on the design of the product. Block diagram and product tree added to report as appendix

because this report are mainly shaped by evaluating them.


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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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19/19

Appendix A.

Documents

Team2_VFood_Subassembly Specifications Document 02.12.2011