Bakers DJ

By Troy MillsELM-Final Project

Contents

• Problem Statement• Background• Solution• Project Design

Parameters• System Diagram• State Machine

Problem Statement

• To design and build a machine that would decorate cakes, cookies, and anything that is placed upon it with a frosting design predetermined by the owner.

Background

• In the baking occupation decoration is very important to make a product that is aesthetically pleasing for customers.

• This decorating takes lots of time and is very tedious work.

• Not all bakers are good decorators.

Background Continued

• Machines are out there for certain types of decorating but they are very expensive. The average mom and pop bakery cannot afford such a device.

• These machines are also very large and used to pushing out thousands, the average low level baker might need a few hundred max.

• There are also screen printers for photo images but this can give the confectionaries a fake look.

Constraints

• A device that is cheap enough for normal bakeries to own, that will utilize an automated table along with frosting extension arm to decorate confectionaries in seconds.

• By limiting the mechanics the design will have more complex software, but comparatively the cost will be greatly reduced.

• Eventually a baker will be able to load a predesigned monochromatic design from Microsoft paint into the machine and the design will be produced using continuous line design.

Prototype Parameters

• 4 inch maximum cookie.• 3 predetermined designs.• Monitor frosting usage amount needed for

design.• Limited to one frosting color.

Solution

• Polar Coordinate system, instead of using X,Y Coordinate system:– Use a rotating mechanism to move cookie to every

known angle.– An Arc mechanism will deliver frosting to any radius.

• Frosting dispenser will be similar to toothpaste tube, with a hose mounted on radial mechanism.

• User interface will be 4 buttons: Reset, Pattern 1-3.

System Diagram

Rotary Table Break Down

• Rotary table will be run by a 5 Volt stepper motor with timing belt, and pulleys.

Sizing Stepper Motor

• 360

• .3125lb cookie plus .5lb frosting resistance• .8125lbs• Single power supply 5 Volts optimal.• Inexpensive model• Compact

Stepper Motor

• Model # 42BY48H08• 5 Volt .55 Amp• 7.5 ° Step Angle 48 steps/ rev

Electrical Design

• HCS08SH8 Microcontroller 20-pin– Power = 1 pin– Ground = 1pin– Stepper Motor (Rotary Table) = 4 pins– Stepper Motor (Frosting Extruder) = 4 pins– Error LED = 1 pin– Frosting LED = 1 pin– Reset = 1 pin– Servo Motor (Frosting Arm) = 1 pin– Design Buttons = 3 pins– Limiter button = 1 pin

• Total 18 pins

Electrical Schematic

Electrical Board Design

General Operation

Conclusion

•Cost Effective• Simple to Use

•Acceptable accuracy•Marketable

Pattern Examples

Schedule

Budget

Timing Belt 2.71

Stepper Motor 7.95

Servo Motor 15

Miscellaneous Parts 50

Timing Pulleys 20.58

Frosting Hoses 30

Sleeve Bearing .83

Frosting 15

Cookies 20

161.24

Questions?