The Perfect Shot Semester 2 Week 6

 This week our team put a focus on completing our build 100% and worked one Deliverable 6. To finish our build we grinded off excess material to ensure a smooth fit, smoothed out metal burs on all brackets and tubing. While we were grinding off excess material, we grinded past the metal and created a hole. This hole was to deep to be patched up so we remade the square tubing bracket, and finished grinding the build. We aligned every square tube and used a standing drill press to go through the metal in the same spot. This allows us to use one trailer hitch  bracket on the backboard and just pull the bolt that goes through 2x places on the square tubing. This quick change system allows our team to make rapid rim changes that can be adapted to different age groups during testing. When our system is put into full operational mode it will allow the referee or coach of a team change the rim based on the age group who is playing quickly. Additionally, this system is forecasted to promote proper form thus reducing injury in children. The testing we have completed has show an accuracy of 60-80 % in children, this was our targeted accuracy that closely mimics the accuracy of high school students. 

Deliverable 6 consist of manufacturing details, issues that arose during our building process, methods to mass manufacture our prototype, and our budget to date/ future budget needs.

To manufacture our rim design we had to order materials from a local vendor ( the items needed are outlined in an image below in the budget), once the material was obtained we cut the material to size, 1x cut at 4" on the 2" square tubing, an identical cut on the 1-3/4" square tubing, the base plate was cut into a square 5"x5", 1/2 in circular tubing was bent into pre determined circles, these pieces were welded together, and grinded down to ensure a smooth fit. Once everything was welded and grinded a standing press was utilized to make holes to ensure interchangeability. 

Issues that came up during this process are as follows:

• Missing the correct die to bend circular tubing and was not sold in store. To combat this problem solid steel circles were machined to the proper fit on the bending press in order to bend the tubing
• Issues arose in aligning the holes on the square tubing,  the tubing would shake when drilled. Our solution was a clamp and using 2x people to drill the holes
• grinding metal on square tubing, this process was a lot of trial and error. One issue came up where we ground to much material off and made holes. Our solution was to add metal on one side and grind that side down. we had to re manufacture the portion we ground through
• Adding material was difficult, we used what we can find in the machine shop and shaved it down to size
• man hours was an issue, this manufacturing process took close to 100 hours due to learning curves and mistakes made 

To mass manufacture our design we would want a metal injection mold made of the base plate and bracket, an additional mold would be made for the inner square tubing and each rim. Our rim design would be sold as an attachment someone could buy and add to their pre existing portable basketball hoop. This set would come with our recommended, shot distances, basketball heights, and ball size per age group. Additionally, this set would have each rim needed, the bracket to replace the current rim setup and 4x ball sizes

The above photos represent our budget for the build to date and possibly what might be needed if issues with the rim occur.

Below is a link to our data that has been gathered for our current prototype:

https://docs.google.com/spreadsheets/d/1sBigCzvpr4RhSynhKHkC-CzYINABXmyUbPwT5xA3D8s/edit?usp=sharing

Unfortunately no additional data was collected this past week, our team was going to go out today to attempt to complete our goal of 10x additional children, however inclement weather hindered our attempt to gather the data. Additionally a mistake was made when grinding the material so a replacement needed to be made. Moving forward we plan on gathering the data we missed out on this week.