Lenze ECSCPxxx - Manual (Page 214)

Commissioning
Configuring the electrical shaft ("E−Shaft")
Setting the stretch factor (C3097 / C3098)
6
l
214 EDBCSXP064 EN 8.0
Arithmetic example: The following is given ...
ƒ Roll diameter − master (d1) = 175 mm
ƒ Gearbox ration − master (i1) = 7,21
ƒ Roll diameter − slave (d2) = 225 mm
ƒ Gearbox ration − slave (i2) = 9,73
stretch factor
+
9, 73
7, 21
* 175
225
stretch factor
+
9, 73 * 175
7, 21 * 225
+
1702, 75
1622, 25 +
1, 049622
The stretch factor can only be entered as a rounded value:
ƒ C3097 = 1703
ƒ C3098 = 1622
Entered stretch factor:
stretch factor + 1703
1622 +
1, 049938
This example results in a deviation of 0.03 % by rounding.
I
Tip!
By extending the numerator and denominator by the factor 4, input values can
be found which correspond to the real stretch factor: C3097 = 6811; C3098 =
6489
Entered stretch factor: 6811 / 6489 = 1.049622
This example with the extended input values does not show any deviations by
rounding.