1. Abstract As our second project for the semester we were confronted with an assignment to improve the functioning of a printer. Our task is to develop a device that can read the velocity of the paper that’s moving through by the printer’s internal rollers. Knowing the velocity of the paper can prevent many problems such as “paper jams” and misalignment. Generating many different solutions we decided on a final design that would be a device that uses a light source that can detect the velocity of the specific paper. Meaning that the paper can be of any texture and size and its velocity can still be read from the device. As a team we believe that our design should be independent, user friendly, flexible, and durable. We determined these four customers’ needs categories by external research. By using internet research and methods of dissection we have learned more about the body and interior of the printer, which allowed us to develop better ideas for our printer prototype. Conclusion Figure5&6. Case Study 1. Independent (0.352) 1.Velocity measurement is independent from the drive rolls (0.1) 2.Velocity measurement is independent from the thickness of the paper (0.075) 3.Velocity measurement is independent from the diameter of the drive rolls (0.066) 4.Velocity measurement is independent from the finish of the paper (0.066) 5.Velocity measurement is independent from the length and width of the paper (0.046) 6.The measurement system will not change the speed of the paper (0.114) 1.User friendly (0.319) 1.Sensor must be cost effective (0.074) 2.Must be easy to clear paper jams (0.065) 3.Must work in direct sunlight (0.007) 4.8.5″×11″ paper size (0.061) 2.Flexible (0.271) 1.The paper stock velocity needs to be measured within a tolerance of ±0.25% (0.104) 2.Hardware must be override-able if sensor stops working (0.054) 3.Must work with paper that contains slight imperfections (0.036) 4.The sheet velocity will be between 250 to 750 mm/s (0.078) 3.Durable (0.057) 1.Sensor must stay clean (0.022) 2.Sensor must be Durable (0.035) Weighted Customer Needs EMS Model Pugh Charts After considering several options for our roller material, we deemed some form of metal to be the best option. This would allow us to have excellent durability and also the option of recyclability. To determine the type of metal we turned to the sustainability tool found in the SolidWorks modeling program. This tool allowed us to compare many different metals to determine the one that is best suited for our application. We narrowed our search down to aluminum and titanium. Aluminum is better for the environment in the categories of carbon footprint, energy use, and water use. Titanium is more sustainable for the air. The other main difference between the two materials is the cost. While aluminum costs about $0.95 per pound, Titanium costs about $18 per pound. This made the choice quite clear to us. We decided that we would choose aluminum as the material to make the rollers with. This would minimize environmental impact and give our customers a significant cost savings. At this point our final design has focused on the rollers and their materials. Further development will focus on other aspects of the printer, including the LDS speed detection system, paper path, and user input. These features will all be designed to meet our specific customer needs and also to reduce environmental impact. By incorporation LDS technology with sustainable design practices, we feel that we were able to develop a concept that will satisfy all customers.