Connor: Safety Weight Hazard
●User will be unable to assemble or transport our device due to weight, or worse yet that they may incur injury while attempting the tasks.
●System is easily broken down into multiple pieces that are projected to be relatively light weight.
●We are also using aluminum as much as possible to reduce part weights.
●We also plan to incorporate adjustable weights, should our product be too heavy.
●We plan to gather a weight of every part to get a running total of the system weight.
●For now, we feel confident that our current mitigation is sufficient.
Shayne: Safety Hazard Pinch Points
●User could possibly be injured from moving parts.
●Hazard areas include pinch points during set up and while machine is running the program.
●A plexiglass cover has been implemented in the design to ensure no audience members handle the display in motion.
●Plexiglass cover must be large enough to encapsulate the whole system and clear for audience viewing. If necessary, add a “Do not touch” sign.
●During setup and packaging the system parts should be locked in place to ensure no movement of rotation parts.
●Plan to involve plexiglass into system. Dimensions and cost must be researched. Possible prototype.
●Ideal Dimensions:
Top x1: 18”x18”
Sides x4: 18”xh”
h: 6”~18” Whatever will contain demo
●Impact danger from moving masses.
●Could cause minor injury to operator or customer while being setup/interacted with Lack of guarding around moving parts
●Add guards to ensure the device cannot be touched during operation
Malik: Technical - Mismatch operating frequencies
●TVA’s impact on the system will not be properly displayed. Thus, the model would be ineffective.
●First, we must determine the ideal operating frequency. Then we must figure out of a way to ensure the system constantly operates at that frequency.
●Current Task - MECE simulation of the overall system. (Determines the operating frequency)
●Later Tasks - Implementing the code for a feedback system that uses the output from the encoders to adjust the speed to what’s desired.
Kyle: Safety - Shock hazard from circuitry
●The person setting up, operating or standing near the TVA is in potential harm of getting an electric shock.
● An added hazard beyond electric shock is that if someone was to be caught in a pressure point, the motors will continue to try and keep speed, causing for even more harm to the person and equipment.
●Incorporating fuses into the circuitry and insulating all electrical contact points will allow for guaranteed protection from the possibilities of a current overload from either a ground fault, an exposed wire being shorted or a rise in torque demand from the motor (if someone or something was to suddenly impede or stop the motor from rotating at its normal speed, the motor will draw more current). This will cut power supply to the system being jeopardized and will mitigate harm to the system itself or the person involved.
●Researching the current requirements for normal operation will allow us to pick the fuses that have the current rating that best suits or application.
●Designing the location of the circuitry to be out of the way and impossible to touch, completely insulating all electrical contact points via electrical tape, shrink wrap, encasing the display in Plexiglas etc. will allow eliminate the possibility of someone accidently shocking themselves though contact.
Nathan: Environmental - Rough Handling/Assembly Causes Damage
●Handling of the system components during shipping, setup, and teardown may cause damage to the system, causing it to become inoperable. I
●improper setup or minor damage to components may increase the wear rate of the system.
●In the short term, designing the system to be overbuilt will help to mitigate risks from aggressive handling and setup, and a protective case to cover all moving components will decrease the likelihood of the system being impacted during transport or setup.
●For long term support, spare parts will be included for handling damage and wear susceptible components so that a new component can be swapped onto the display if needed.
●Specific tasks for mitigation involve stress and fatigue life calculations for the mechanical components, long hour testing to determine wear susceptible parts, and live testing with untrained persons operating the display to identify any potential durability issues.
Shayne:
Possible Vendor:
From provided MSD links, eplasticssells Plexiglass sheets and glue.
They are also willing to cut the Plexiglass $18.
0.125x24x48
$34.92
5.85 lb.
0.125x24x96
$69.84
11.7 lb.
48/96 depend on the height of plexiglass walls.
Shipping: Costs $10.50, Located in California: Shipping will take 5-7 Business days plus 1 for additional cutting.
2 weeks with extra MSD hold ups
Budget:
Plexiglass sheet:
Best Case: $63.42
Worse Case: $98.32
Plexiglass glue:
$4.68
●Recommend having a shorter height to reduce cost and weight
Links to Vendor:
guide:
- What is the main concern for this risk?
- What general things can we do to mitigate it? (short term & long term)
- What tasks are we planning/can we plan to do to help mitigate it? (ex: system simulation, physical hardware tests, surveys, etc.)
- Any other contributions (these are the most important risks we determined - should have the most mitigation plans!)