Parts Decision Matrix
- Jason Li
- Yuchen Lin
Part | Material & Method | Cost | Ease of Manufacture | Strength | Longevity | Total Score | Chosen? |
|---|---|---|---|---|---|---|---|
Gears | 3D Printing | Cheapest but depends on material | Very flexible and can be rapid prototyped and altered | Weak compared to metal but can be enough depending on material | Again depends on material choice | Â | Tripod plate with inner gear ring will be printed(leaning towards PETG or CF based filaments, preferably something like nylon-cf |
 | Metal & CNC | Most expensive | Difficult to manufacture, needs proper measurements and sketches. ALOT OF WORK | Metal is strong. Depends on the metal as well but overkill for this project. | Same as strength |  |  |
 | Metal/Polycarb Laser Cut | Middle ground, highly dependent on material and machine | Fast to make than 3d printing but harder to design with(2d surfaces only) | Metal and polycarb is stronger than filament based models | Same as strength |  | Primary means of making the gears, but due to size model difficulties, some will be 3d printed. |
Base Plate | Metal | High Costs | Hard to make | strong | strong | Â | Â |
 | Acrylic | Cheap | Fast to make | mid | mid |  | Most flat plates will be polycarb plates cut in laser cutter since its fast and can be easily altered(drill for additional screw holes/mounts) |
 | Plastic | Cheap | Longer to make(for plates due to print speeds) | weak | weak |  |  |
Servo | https://www.amazon.ca/Servo-Digital-Torque-Continuous-Rotation/dp/B0B9FYCG97/ | Â | Â | 20kg | waterproof | Â | Chosen because it was one of the only continuous servo with a more standard/durable enclosure(waterproofed as well) |
 | https://hobbyhobby.com/standard-servo-hs-311-universal/hrc31311s/107501/ |  |  | 3-5kg | no |  | Not weatherproof and weaker(possible future proofing) Not accurate enough(rpm spin rate and other stuff) |
 | https://www.amazon.ca/ZOSKAY-Coreless-Digital-Stainless-arduino/dp/B07SBYZ4G5/ | 43.68 |  | 35kg | IP66 |  | chosen against other servos for additional strength(cheapest in 35kg). Futureproofing for longer/different antenna(pole sticking out higher leverage = more torque needed) |
Tripod | 139.99 | expensive version | item weight: 2.05 Kilograms weight limit: 12kg  This tripod is heavier for one person to carry and assemble | N.A |  | This is not choosen because it’s more expensive and did the same task as the cheaper version | |
 | 69.99 | cheaper with the samiliar functionality | item weight: 1.5 Kilograms weight limit: 5kg Reasonable weight is around 3 kg | N.A |  | choosen because it is cheaper and also perform the same tasks. The advantages will be this version is slightly lighter for one person to finish the assembly. | |
Bearing (6804zz) | CA$85.20 |  |  |  |  | the size fits the need. It’s needs to large in size to make it stable. |