GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 338)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
210
4. Drive used as an unwinder – unwinding side = down
M
W[+]
DRIVE
R
Line speed
T[-]
M
Nip roll Unwinder
Winder side = Down
Wind/unwind = Unwinder
Figure 6.17.16: Drive used as an unwinder – unwinding side = down
If the speed demand function is used, the system creates a positive speed reference; it is therefore necessary
to connect the motor so that, with this polarity, the coil unwinds the material starting from the lower side. The
unwinding torque is negative.