Week 7

Summary

• After researching more about our initial idea, we discovered that since the drone is about 1 meter wide, the coconut tree leaves might prevent the drone from getting close to the coconut in some cases. It is also a safety hazard if the drone gets too close to the leaves. Figure 1 shows a coconut tree where the leaves will prevent the drone from getting close to the coconut.

Figure 1: Coconut tree leaves are blocking direct access to the coconut (Source)

• To fix this, we decided to implement the idea of using a robotic arm, which was first thought of in week 5. Attaching the laser cutter to the robotic arm should allow the drone to cut the coconut at a safe distance.
• Table 1 shows the updated parts list with a robotic arm, and cheaper drone that has a higher takeoff weight.

Table 1: Updated parts list

Category	Part	Weight (kg)
Drone	Allied Drones HL88 "Nemesis"	-
Robotic Arm	Global Specialties R680 C-Programmable Banshi Robotic Arm	0.589
Laser Module	CNC Laser Engraver DIY Metal Marking Machine	2.400
Laser/Robotic Arm Battery	2x YUASA BATTERY NP4-12 12 V 4AH BATTERY	3.174
Camera	SportShot® - Full HD 1080P 12 MP Waterproof Sports Camera	0.0589
Total Weight		6.2219

• The Allied Drones HL88 "Nemesis" has a maximum takeoff weight of capacity of 8.2 kg. That is about 2 kg under the limit.