SERVO MOTOR

Mass of the body(m)= 2.66g = 0.0026kg

radius=15 cm=0.15 m

acceleration due to gravity(g)= 9.8 m/s

µ= 0.5

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F=m*g

F=0.0026*9.8

F=0.0261 N

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Now considering friction

f=mg*µ

f=0.0261*0.5

f=0.0130 N

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Now torque:

T=f*r

T=0.0130*15

T=0.195kg-cm

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Considering Factor Of Safety i.e., FOS=1.5

Final torque=T*FOS

Final Torque=0.195*1.5

Final torque=0.2 Kg-cm

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By comparing with table of specification for 0.2 Kg-cm ,we need servo motor of specification Tower Pro SG-90.

Operating Voltge:(3.0-7.2)V.

Stall current:650mA.

No. of SG 90 Servo Motor Required: 4