B&R 8I84T200037.01P-1, User Manual

Page: 281 / 405

Programming guidelines
ACOPOSinverter P84 User's Manual 2.10 281
2.8.11.32 Counter wobble
Traverse control
drive
Winding drive
Winding motor
Traverse control motor
Gearbox
Cam
Reel of yarn
Thread guide
Thread
Main shaft
Gearbox
The function "Counter wobble" is used for some applications to attain a constant voltage of the yarn as the function
"Traverse control" results in too heavy frequency fluctuations of the motor of the thread guide ( trH and trL ).
Two motors must be used (one master and one slave).
The master controls the speed (frequency) of the yarn guide, the slave controls the winding speed (winding fre-
quency). The function returns a setpoint correction to the slave in the opposite direction to the master. This means
that synchronization is then required using one of the master's logic outputs and one of the slave's logic inputs.
Run command on
master and slave
Traverse control
command on master
and slave
Yarn guide motor
speed
(master drive)
tSY/ SnC synchronization
Winding motor speed
(slave drive)
t
t
t
t
trH
trL
trH
trL