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 |
| 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 |
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| 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 |
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| 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 |
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Servo | https://www.amazon.ca/Servo-Digital-Torque-Continuous-Rotation/dp/B0B9FYCG97/ |
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| 20kg | waterproof |
| Chosen because it was one of the only continuous servo with a more standard/durable enclosure(waterproofed as well) |
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| 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 |
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| the size fits the need. It’s needs to large in size to make it stable. |