The formula to calculate the Velocity Ratio of Compound Belt Drive is:
\[ i = \frac{P_1}{P_2} \]
Velocity ratio is the distance through which any part of a machine moves to that which the driving part moves during the same time. Product of diameters of drivers is the value obtained after the multiplication of all the diameters of the driver pulley. The product of diameters of drivens is the value obtained after the multiplication of all the diameters of the driven pulley.
Let's assume the following values:
Using the formula:
\[ i = \frac{40}{60} = 0.666666666666667 \]
| Product of Diameters of Drivers (P1) | Product of Diameters of Drivens (P2) | Velocity Ratio (i) |
|---|---|---|
| 30 | 60 | 0.500000000000000 |
| 35 | 60 | 0.583333333333333 |
| 40 | 60 | 0.666666666666667 |
| 45 | 60 | 0.750000000000000 |
| 50 | 60 | 0.833333333333333 |