The formula to calculate the RPM from PPR is:
\[ RPM = \left(\frac{PR1 \times 60}{PPR}\right) \times GR \]
Where:
Let's say the pulses received in one second (PR1) is 120, the pulses per revolution (PPR) is 100, and the gear ratio (GR) is 2. Using the formula:
\[ RPM = \left(\frac{120 \times 60}{100}\right) \times 2 = 144 \]
So, the Rotations Per Minute (RPM) is 144.