8. Resource specification - P-Division-2022-2023-Odd/Repo11 GitHub Wiki
8.1 Motor sizing
volume of two Front and back sheets = 10.5 * 19.5 * 0.8cm^3 * 2 = 327.6 cm^3
volume of two side sheets = 10.5 * 28.5 * 0.8 * 2 = 478.8 cm^3
the volume of top and bottom sheets (including lid) = 19.5 * 28.5 * 0.8 * 2 = 889.2cm^3
Total Volume of foam sheets = 1695 cm^3
Density of Foam sheet= 0.961 g/cm^3
Mass= 1627.0g
max load capacity = 1kg
total mass with load = 2.6278 kg
Torque = co-efficient of friction * total mass * acceleration due to gravity * radius of the wheel = 0.85 * 2627.8 g * 10 * 6 cm Toruqe = 134.0178 g-cm = 1.340178 Kg-cm
T= 1.35 kg cm
Total Torque= Torque * FOS
Total Torque= 1.35 * 1.5
Total Torque= 2.025 kg cm
This implies the required motor is 100 rpm DC Motor.
Servo motor to be used is tower pro SG-90
8.2 Battery selection
The required battery for DC motor is 11.1V battery
8.3 Bill of materials(BOM)
| sl no | Name of parts | price | quantity |
|---|---|---|---|
| 1 | Robot wheel | 40 | 2 |
| 2 | neo 6M | 306 | 1 |
| 3 | C5883L | 200 | 1 |
| 4 | L289N | 120 | 1 |
| 5 | HC-05 | 620 | 1 |
| 6 | Arduino mega 2560 | 840 | 1 |
| 7 | 100RPM motor | 50 | 2 |
| 8 | Swivel caster wheels | 108 | 1 |
| 9 | cutting wood | ... | ... |
| 10 | wires | ... | ... |
| 11 | cardboard | ... | ... |
| 12 | Styrofoam | ... | ... |
| 13 | PLA | ... | ... |
| 14 | wheels | 40 | 2 |
| 15 | Towerpro SG90 | 183 | 1 |
| 16 | plastic box | 100 | 1 |
| total | ... | 2737 | ... |