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PGD Motor Pulse Distance Calculation

For the PGD motor there are 30 pulses per revolution of the motor shaft. The formula to calculate the linear distance the pulley would turn in one pulse is:

mm/pulse = (π × Pulley Diameter) / (30 × Gear Ratio)

*Gear Ratio values for specific speed codes are found in our Senergy MDR & Gear Drive Technical Guide

For example, we have a standard Senergy roller with a diameter of 48.6 mm (standard 1.9” tube) and our speed code is 60. From the chart on page 10 (2019 edition of the Catalog) indicates that the Gear ratio for a 60-speed code is 11. From this information we plug in the values into our formula:

(π × 48.6) / (30 × 11) = 0.463 mm per pulse

For this 60-speed code Senergy roller, when you set the Deceleration in Closed Loop mode to 50 pulses; the roller will decelerate for a distance of:

0.463 mm/pulse × 50 pulses ≅ 23 mm