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7.Resource Specifications

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Divyanagsupritha edited this page Jul 28, 2023 · 4 revisions

Motor Sizing

Total Mass = m(motor)+m(cards)+m(gear)+m(other Components)

Force = μmg

Torque = Force * Radius

T(max) = Torque * 1.5 (Factor of safety) .(N.m)

T(max)= T(max)*100/9.8 (in Kg.cm)

To calculate mass we need the volume of the components

The volume of gear = 3623.832 mm^3.

Calculation of mass:

  1. Mass of the gear = density * volume = 4.4935 g

  2. Mass of the other components = 200g (misc)

  3. Mass of the motors= 50 g + 150 g = 200 g

  4. Mass of the cards = 130 g.

  5. Mass of Arduino = 40g

    Total mass= 574.5 g

    Force = μmg = 0.3824 * m * 9.81 = 2.15514 N

    Torque = Fr

    = 2.15514 * 1.4111 cm = 0.03041128 Nm

    = 0.31010876 kgcm

    T(max) = Torque * 1.5 = 0.46516314 kg cm

Thus we select NEMA 17 3.2 kgcm Stepper motor.

For DC motor:

Mass of 1 card = 130/54 = 2.407 g

Mass of DC motor = 150 g

Force F = μmg = 0.28552.40710^-3*9.81

= 0.1465 N

Torque = Fr = 0.1465 * (25*10^-2)m (distance which card needs to travel)

= 0.03663 Nm

= 0.37352 kg cm

Tmax = 1.5 * T = 0.56028 kg cm

We decide to use an N20 micro metal gear DC motor to deal the cards.

Adaptor Sizing

We are using 1 stepper motor and 1 DC motor for our project.

For one DC geared motor load current = 300mA.

Factor of Safety = 1.2

1A * 1.2 = 1.2 A

For dealing the 1 deck of cards we needed 200 rpm DC motor. Therefore we use a 12 V, 2A adapter for the N20 metal geared DC motor.

For Stepper motor:

We are using NEMA 17 3.2 kg-cm Stepper motor:

Load current at max load = 1.4 A

Factor of Safety = 1.2

1.4*1.2 = 1.68 A

Therefore we use 12V, 2A adapter for NEMA 17 Stepper motor.

We made use of L298N driver for supplying power to the stepper motor. We used a 12 V 2A adapter to supply power to the L298N driver. And we also used a 12V 2A adapter through a 2 channel relay to power the N20 DC motor to obtain adequate spin speed.

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