Theory of Machine
Pitch point on a cam is

Any point on pitch circle
Any point on pitch curve
The point on cam pitch curve having the minimum pressure angle
The point on cam pitch curve having the maximum pressure angle

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Theory of Machine
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

Tension in the slack side of the belt
Tension in the tight side of the belt
Sum of the tensions on the tight side and slack side of the belt
Average tension of the tight side and slack side of the belt

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