Lenze i950

7.2.1 Dening the winding direcon
In order for the feedforward control values and the interference compensaon to act in the
r
equired direcon, the winding direcon must be adapted to the material ow direcon. The
sign in the parameter Winding direcon with line velocity > 0 denes whether the winder
drive operates as an unwinder or a rewinder. 40x5051:011
Once this winding direcon has been dened in the parameter Winding direcon with line
velocity > 0, the winder will automacally switch the winding direcon when the sign of the
line speed signal changes.
The current winding direcon is displayed in bit 17 = TRUE of the parameter Status signals.
40x5050:110 Bit 17
3
~
3
~
F
RR
F
v
M
n
n, M
Unwinder
Rewinder
Material flow
Fig. 34: Eecve direcon of speed and torque as a funcon of the material ow
Minimum line velocity
The minimum line speed is dened in the parameter Minimum line speed. The lo
wer limit
value is dened via the parameter Minimum line speed.
The winder permanently follows the line speed, regardless of the altude, as there may other-
wise be a risk of that the material may slack or tear. The diameter is maintained below the
minimum line speed. For the dancer posion control, the I component is reset.
Hold diameter
t
v
[mm/s]
Min. line velocity
0x5051:013
Fig. 35: The diameter must be held at VLine < VLine:min
Conguring the "Winder Dancer" TA
Con
trol sengs
Dening the winding direcon
99