# 6.5 MECHANISM AND RESOURCE SPECIFICATIONS

MOTOR SIZING

Density=0.92

Height=10cm

``````VOLUME=3.14*R^2*H

=3.14*5*5*10

Volume=785.5cm^3
``````

Mass=density*volume

``````=0.92*785.5

=722.66g
``````

Mass=0.72266kg

Force=mass*acceleration due to gravity

`````` =0.72266*9.8
``````

Force=7.08148 Newton

Torque=Force*perpendicular distance

``````  =7.08148*5.5*10^2
``````

multiply by safety factor

Torque=7.081485.510^2*1.5

``````  Torque=1.98422 kg-cm
``````

Here we are using 1 dc motors

Hence required DC motor is 60rpm.....

Rated RPM at 12v Rated torqe in kg-cm at 12v 1000 0.12 500 0.25 300 0.35 200 0.5 150 0.8 100 1.2 60 2 30 4 15 8 10 12 3.5 30

For our course project we will use dc motor of 60 RPM

BATTERY SIZING

Sl no Components Quantities operating voltage Operating current of each component Total current
1 DC motor 1 12v 300mA 300*1=300mA
2 servo motor 1 4.8v 650mA 650*1=650mA
3 arduino mega 2560 1 5v 100mA 100*1=100mA
4 2-Channel Relay module 1 5v 70mA 70*1=70mA
5 LED 2 3.6v 30mA 30*2=60mA
12v 5v
300mA=0.3A 850mA=0.85A

6.6 3D MODEL