3.20 Parameters: 30-** Special Features
3.20.1 30-0* Wobble Function
The wobble function is primarily used for synthetic yarn
winding applications. The wobble option is to be installed
in the Adjustable frequency drive controlling the traverse
drive. The traverse drive Adjustable frequency drive will
move the yarn back and forth in a diamond pattern across
the surface of the yarn package. To prevent a buildup of
yarn at the same points at the surface, this pattern must
be altered. The wobble option can accomplish this by
continuously varying the traverse velocity in a
programmable cycle. The wobble function is created by
superimposing a delta frequency around a center
frequency. To compensate for the inertia in the system a
quick frequency jump can be included. Especially suitable
for elastic yarn applications, the option features a
randomized wobble ratio.
175ZB001.10
Par. 30-09: RANDOM FUNC
Par 30-11: RANDOM MAX
Par 30-12: RANDOM MIN
T
DOWN
T
UP
Par. 30-06: JUMP TIME
Par. 30-04 [Hz]: JUMP FREQ
Par. 30-09 [%] : JUMP FREQ
CENTER FREQ
Par. 30-07: WOBB TIME
Frequency
[Hz]
Time [s]
Par. 30-01 [Hz]: DELTA FREQ.
Par. 30-02 [%]: DELTA FREQ.
(Par. 30-03)
Par. 30-01 [Hz]
Par. 30-02 [%]
(Par. 30-03:)
Par. 30-*1: RAMP UP
Par. 30-10: [RATIO T
UP
/ T
DOWN
]
Par. 30-08: [INDEPENDENT UP and DOWN]
30-00 Wobble Mode
Option:
Function:
The standard speed open-loop mode in
1-00 Configuration Mode
is extended with a
wobble function. In this parameter, it is
possible to select which method to be used
for the wobbler. The parameters can be set
as absolute values (direct frequencies) or as
relative values (percentage of other
parameters). The wobble cycle time can be
set as an absolute value or as independent
up and down times. When using an absolute
cycle time, the up and down times are
configured through the wobble ratio.
[0]
*
Abs. Freq.,
Abs. Time
[1]
Abs. Freq.,
Up/ Down
Time
[2]
Rel. Freq.,
Abs. Time
30-00 Wobble Mode
Option:
Function:
[3]
Rel. Freq.,
Up/ Down
Time
NOTE!
This parameter cannot be set while running.
NOTE!
The setting of “Center Frequency” takes place via the
normal reference handling parameter group, 3-1*
30-01 Wobble Delta Frequency [Hz]
Range:
Function:
5.0
Hz
*
[0.0 -
25.0 Hz]
The delta frequency is determining the
magnitude of the wobble frequency. The delta
frequency is superimposed on the center
frequency.
30-01 Wobble Delta Frequency [Hz]
selects both the positive and negative delta
frequency. The setting of
30-01 Wobble Delta
Frequency [Hz]
must thus not be higher than
the setting of the center frequency. The initial
ramp-up time from standstill until the wobble
sequence is running is determined by
parameter group 3-1*.
30-02 Wobble Delta Frequency [%]
Range:
Function:
25 %
*
[0 - 100 %]
30-03 Wobble Delta Freq. Scaling Resource
Option:
Function:
Select which drive input should be
used to scale the delta frequency
setting.
[0]
*
No function
[1]
Analog input 53
[2]
Analog input 54
[3]
Frequency input 29
FC 302 only
[4]
Frequency input 33
[7]
Analog input X30/11
[8]
Analog input X30/12
[15] Analog Input X48/2
30-04 Wobble Jump Frequency [Hz]
Range:
Function:
0.0
Hz
*
[Application
dependant]
The jump frequency is used to
compensate for the inertia in the traverse
system. If a jump in the output frequency
is required in the top and in the bottom
of the wobble sequence, the frequency
Parameter Descriptions
FC 300 Programming Guide
MG33MD22 - VLT
®
is a registered Danfoss trademark
3-151
3
3
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