Lenze E94AxHE Technology Application Electronic gearbox - Manual (Page 17)

EDS94TA10030xxxx EN 1.2 - 11/2009
L
17
9400 Technology applications | Electronic gearbox
Introduction
Application examples
3.9.4 Tighten the web via trimming function with cascade
In case a clearance has developed, the web must be "tightened" again. Only then the
machine can be accelerated again via the master. The subsequent slave (cascade structure)
must run along in the set ratio. Thus, the trimming function acts directly before or after the
stretching factor.
[3-6] Trimming function in case of the electronic gearbox as cascade
n Real master/slave 1
o Slave 2 with master value trimming
p Slave 3
q Digital frequency cascade (digital frequency extension module required)
i
Slave Master/Slave
d v
d v
d v
R1
R2
R4
1
2
4
i
1
i
2 4
Œ Ž
v
3
v
4
i
Slave
d v
R3 3
3

v
1

Digital
frequency