Pulseroller Products / Motor Rollers / Performance Data /

Motor Pulse to Distance Calculation

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

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

This data has been summarized in the following chart for the available Senergy Speed Codes

Data for 48.6 Dia Motor Rollers

Speed Code	Gearbox Stages	Gear Ratio	Distance per Pulse mm/pulse (in/pulse)
10	3	605/9	0.076
			0.0030
15		45	0.113
			0.0045
20		33	0.154
			0.0061
25		27	0.188
			0.0074
35	2	55/3	0.278
			0.0109
45		15	0.339
			0.0134
60		11	0.463
			0.0182
75		9	0.565
			0.0223
95	1	75/11	0.746
			0.0294
125		5	1.018
			0.0401
175		11/3	1.388
			0.0546
215		3	1.696
			0.0668

Calculation Example

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