7.RESOURCE SPECIFICATION - H-Division-2021-2022-Even/Repo-14 GitHub Wiki

MOTOR SIZING

Stepper Motor Calculation

1.Dimensions of Inner Disk= 13 cm radius and 0.5 cm thickness

  • Density of Acrylic sheet=1.19 g cm^3

  • Volume of inner disk=3.1421313*0.5 =265.499 cm^3

  • Mass of inner disk=Volume x Density =265.499 x 1.19 =315.94 grams

  1. Dimensions of Aluminium Channel = 1.5cmx1.2cmx22.5

  • Volume of Aluminium Channel = 40.5 cm^3

  • Density of Aluminium = 2.7g cm^3

  • Mass of Channel=40.5 x 3 x 2.7 =328.05 grams

  1. Mass of Motor = 240 grams

  2. Total mass = 240 + 328.05 + 315.94 = 883.99 g = 0.883 kg

  3. Torque = 0.883 * 1 = 0.883 kg cm

  4. Total Torque = 0.883 x 1.5 = 1.32 kg cm

Thus, the motor suitable for our application is a 28BYJ-48 Unipolar Stepper Motor 5V.

DC Motor Calculation

  1. Dimensions of Outer Disk = 17.5 cm Radius and 0.5 cm Thickness

  • Density of Acrylic Sheet = 1.19 g cm^3

  • Volume of Outer Disk = 3.142 x 17.5 x 17.5 x 0.5 = 481.11 cm^3

  • Mass of Outer Disk = 481.11 x 1.19 = 572.53 grams

  1. Dimensions of Aluminium Channel = 2.5cm x 1.2 cm x 26 cm

  • Volume of Aluminium Channel = 2.5 x 1.2 x 26 = 78 cm^3

  • Total Volume = 78 x 3 = 234 grams

  • Density of Aluminium = 2.7 g/cm^3

  • Mass of Aluminium Channel = 234 x 2.7 = 631.8 grams

  1. Mass of Motor = 300 grams

  2. Total mass = 572.53 + 631.8 + 300 = 1504.33 grams

  3. Torque = 1.5 kg × 1 cm

  4. Total Torque = 1.5 × 1.5 = 2.25 kg cm

Thus, the suitable motor for our application is a 60 RPM -12 V , Low Noise DC Motor with Metal Gears - Grade A

Power Adapter Calculations

Let I be the total current required.

  • Current (I) = ?
  • Number of Motors (N)= 2 ( Stepper and DC)
  • FOS = 1.2
  • Current supply (I) for DC motor = 300 mA
  • Current supply (I) for Stepper Motor = 300 mA
  • I = i×N×FOS
  • = (300+300) mA × 2 × 1.5
  • = 1800 mA = 1.8 A

As per our Calculations,we are going to use Power Adaptor of Specifications 12V-2A.

Sl. No. Name Specifications Current Specification Quantity Weight (In grams)
1 60 RPM Low Noise metal geared dc-motor operates at 60 rpm 300 mA 1 300
2 Power Adapter operates at 12 V 2.5 A 1 --
3 Stepper motor 28BYJ-48 5V 300 mA 1 240
4 Microcontroller Arduino Mega-2560 20mA to 50 mA 1 37
5 LED's operating voltage (3v) 20 mA 2 2
6 Buzzer operating voltage (5v) <=32 mA 1 --
7 IR sensor operating voltage (5v) 40 mA -- 50
8 Colour sensor TCS3200 2mA 1 2
9 Combined two Relay-module operating voltage (12 V) 80 mA 1 30
10 Bluetooth Module HC-05 40 mA 1 50