1. Team INASAD Members: Jose Medina Joseph Leone Andrew Merk Alex Sanders Michael Fox

2. 22 Past Events Midterm presentation Current Events Post Mid-Term Review Layout Drawings Future Events Engineering Analysis Agenda:

3. 33 Past Events Midterm Presentation comments were reviewed as a group Positive feedback, questions and suggestions were received on concept and presentation Questions and comments were organized and answered Layout drawings were created

4. 4 Comments on the Presentation GT Facilities pays electrician $35/hour to change bulbs Less information on weighing process needed Be sure to account for gravity in calculations Design looks complex Must balance power to lift and turn bulbs with the delicacy needed not to break them Nice images Presentation was long Presentation showed great polish and poise

5. 5 Question Categories 1. Baseline Comparison 2. Extra Options 3. Suction Cup Questions 4. Installation/removal of bulbs 5. Maintenance 6. Operational Questions

6. 6 Baseline Comparison Question: Wouldn’t a handheld tool be more useful? Answer Target market is commercial or industrial facilities Replace many bulbs at a time Handheld device would cause strain on the back and muscles Product is designed to eliminate that strain and work faster than a handheld system.

7. 7 Extra Options Question: Is a motor and LCD Camera really needed and will there be a light tool for changing the first bulb? Answer: May be needed for higher ceilings All three of these would be purchasable options

8. 8 Extra Options Question: Does it require electricity? Answer: The base tool does not require electricity motion caused by pull cables, levers, and hand cranks Extra options would require electricity supplied by a rechargeable battery attached to the base

9. 9 Suction Cup Questions Question: How are the suction cups pressed to the bulb and then eventually released and how secure are they? Answer: Contact between suction cups and the bulb are a result of raising the tool into the bulb The tool will be lowered pulling the suction cups off the bulb The suction cups have been qualitatively tested and from these experiments the assumptions that the cups would securely stick while still release was acceptable.

10. 10 Suction Cup Questions Question: How reliable are the suction cups and have any calculations been run to determine how much they can hold? Answer: No quantitative calculations have been run Quantitative Testing is needed Qualitative tests show 2 suction cups (1 on each side) can hold 1 bulb 2-3 will be used to increase reliability and ensure adequate suction to perform desired task

11. 11 Suction Cup Questions Question: How many uses will you get out of the suction cups and how will it be adjusted for the suctions cups loosing grip over time or the affects of dust/dirt? Answer: The number of uses will be found by product testing Total load is distributed to reduce wear In the case of lost grip Multiple suctions cups were added to ensure usability even if one suction cup fails Affects of dirt and dust Can be removed prior to usage by wiping the suction cups with cleaner or water

12. 12 Installation/removal of bulbs Question: How long do bulbs usually last in service and how will the light screens/covers be removed? Answer: Fluorescent bulb life is about 10,000 hours There is a large variety of light screens/covers Removing them is not being explored currently The tool is seen as a way to minimize the use of a ladder thereby increasing speed and safety of the process

13. 13 Installation/removal of bulbs Question: Can it be used to replace bulbs of different diameters as well as bulbs which are next to each other? Answer: Various diameters can be obtained with interchangeable sleds inserted into the mechanism. The tool will be able to be used for fixtures with a minimum of.875” distance between the bulbs

14. 14 Installation/removal of bulbs Question: What is being designed to account for the dexterity needed to align and is it possible to self align? Answer: Alignment position gained by the removal of the old bulb will be used to install the new one If more dexterity is needed the optional camera and LCD screen can be purchased A mechanism is being examined to provide self alignment capability

15. 15 Installation/removal of bulbs Question: Is there a chance of the spring force breaking dislodging the bulb? Answer: Calculations will be made to ensure that the spring force rarely if ever breaks a bulb.

16. 16 Maintenance Question: Will the curved track give present a problem with the length of the spring? Answer: An extension spring is used so the track shape should not affect the spring length The curve will only affect the spring when it is fully extended and most flexible

17. 17 Operational Questions Question: Why is a shield required? Answer: To protect the operator from broken glass

18. 18 Operational Questions Question: How will the bowing affect the stability? Answer: The base will be heavy enough to counter the tilting motion cause by the bowing.

19. 19 Operational Questions Question: How long will it take? Answer: Time can not determined until product is created and tested Attempting to reduce the time by over 50%.

20. 20 Operational Questions Question: How much will the product weigh and as a result will it be easy to move and store? Answer: The weight will be determined when the material selection analysis is completed The product will have a rolling base to provide easy transport Storage room in a closet or dedicated area would be required.

21. 21 Overall Design

22. 22 Bulb Rotation Subsystem

23. 23 Height Adjustable Support Subsystem

24. 24 Bowing Subsystem

25. 25 Bulb Changing Subsystem

26. 26 Future Engineering Analysis Failure modes and Factors of Safety Potential problems Estimate basic features The design analysis Strength of materials analysis Fatigue analysis Stability during operation Kinematic analysis Dynamic load analysis Control methods and algorithms Material selection Safety Human interface Tolerances Performance analysis and prediction

27. 27 INASAD Fluorescent Light Changing System