6. Motor sizing & Battery sizing - C-Division-2022-2023-Odd/Repo-13 GitHub Wiki

MOTOR SIZING

Mass of body to hold (m) = 0.2 Kg

Radius(r) = 0.075m

Acceleration due to gravity(g) = 9.8 m/s^2

μ = 0.45

F = m * g

F = 0.2 * 9.8

F = 1.96 N

Now considering friction

f = mg * μ

f = 1.96 * 0.45

f =0.882 N

Now Torque : T = f * (D/2)

T = 0.882 * (0.075/2)

T = 0.033 Kg-m

T = 0.033* (100/9.8)

T = 0.3367 Kg-cm

Considering Factor Of safety i.e. FOS = 1.3

Final Torque = T * FOS

Final Torque = 0.3366 * 1.3

∴ Final Torque = 0.43 Kg-cm @ 12V

∴ By comparing with table of specification for 0.241 Kg-cm Rated Torque , We need Stepper Motor.

BATTERY SIZING

Sl.no.	Components	Quantity	Voltage required	Current drawn
1.	Stepper motor	1	12v	500 mA
2.	Aurdino Mega	1	5v	40 mA