Lenze ECSCPxxx - Manual (Page 213)

Commissioning
Configuring the electrical shaft ("E−Shaft")
Setting the stretch factor (C3097 / C3098)
6
l
213 EDBCSXP064 EN 8.0
Formulas for setting the stretch factor
Requirements:
ƒ The circumferential speeds of both rolls are to be the same.
ƒ Both rolls have the same diameter so that they must have the same speed too.
roll 1 roll 2
ratio i1 ratio i2
motor 1
(Master)
motor 2
(Slave)
stretch
factor
ECSXP004
Fig. 6−50 Electrical shaft: Master and slave roller drives affect the same web.
roll 1 Roll 1
roll 2 Roll 2
ratio i1 Mechanical gearbox ratio − master
ratio i2 Mechanical gearbox ratio − slave
stretch factor Stretch factor
Requirement: Synchronism of the rolls
n
roll 1
+ n
roll 2
n
motor 1
i1
+
n
motor 2
i2
stretchfactor
+
n
motor 2
n
motor 1
+ i2
i1
stretch factor + i2
i1
+ C3097
C3098
Different roll diameters (d1, d2) must be considered for the stretch factor as follows:
stretch factor + i2
i1
@ d1
d2
+ C3097
C3098