6. Resource Specifications - B-DIV-2023-2024-ODD/B12 GitHub Wiki

Resources

Diameter of pulley = 1.5cm

Density of the acrylic sheet = 1,15g/cm3

Density of the sponge = 0.40

Mass of DC motor = 250g

Mass of pulley = 0.50g

Mass of belt drive = 300g

Calculation of acrylic duster holder 1

Length (l)= 26.5

breadth (b)= 4cm

thickness (h)=0.8cm

V=lxbxh= 84.8cm3

M= Densityvolume = 1.1584.8 = 97.52

Calculation of acrylic duster holder 2

length(l) = 8cm

breadth(b) = 8cm

height = 0.4cm

v= lxbxh

= 25.6

M=dv =1.1525.6 =29.44

Total mass

97.52+ 29.44= 126.96

Calculations of duster

length= 23cm

breadth= 4cm

height= 2mm=0.2cm

v=lxbxh

= 18.4

Mass= volume * density

= 1.2 * 18.4

= 22.08

Total mass

Total mass (m1) = mass of belt drive + mass of the DC motor

              + mass of the duster holder + mass of the duster

              + mass of rubber + mass of pulley

            = 300+250+126.96+22.08+0.50

            =699.54

Total mass(m2) = Total mass + mass of runner

           = 700 + 350g
          
           = 1.050kg

Force Calculations

F= mg

F= 0.85 * 1.05

F= 0.892 N

Torque

T= F*r

=0.892*3

=2.67

considering factor of safety

T= 2.67 * 1.5

T= 4.005

corresponding motor rpm = 60rpm

Power calculation

Arduino mega 2560 = 5v

current = Current required for 1 dc motor

    = 200mA

Power = V*I

  = 5x200x10^3
 
  = 1W