Parameters: 30-** Special Features - Danfoss VLT AutomationDrive FC 300 Programming Manual

Parameter Descriptions

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 frequency converter controlling the traverse drive.
The traverse drive frequency converter 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.
Frequency
[Hz]
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
CENTER FREQ
Par. 30-10: [RATIO T
Par. 30-08: [INDEPENDENT UP and DOWN]
Illustration 3.64 Wobble Function
30-00 Wobble Mode
Option: Function:
NOTE
This parameter cannot be adjusted while
running.
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
parameter). The wobble cycle time can be set
as an absolute alue 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
®
VLT AutomationDrive Programming Guide
Par. 30-07: WOBB TIME
Par. 30-06: JUMP TIME
Par. 30-04 [Hz]: JUMP FREQ
Par. 30-09 [%] : JUMP FREQ
Par. 30-09: RANDOM FUNC
Par 30-11: RANDOM MAX
Par 30-12: RANDOM MIN
T T
UP
DOWN
/ T ]
UP DOWN
Time [s]
®
MG33MG02 - VLT is a registered Danfoss trademark
30-00 Wobble Mode
Option: Function:
[2] Rel. Freq.,
Abs. Time
[3] Rel. Freq.,
Up/ Down
Time
NOTE
The setting of "Center Frequency" takes place via the
normal reference handling parameter group, 3-1*
References
30-01 Wobble Delta Frequency [Hz]
Range: Function:
5 Hz [0 - The delta frequency is determining the
*
25 Hz] magnitude of the wobble frequency. The delta
frequency is superimposed on the center
frequency. 30-01 Wobble Delta Frequency [Hz] is
selecting 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* References.
30-02 Wobble Delta Frequency [%]
Range: Function:
25 % [0 - 100 %] The delta frequency can also be expressed
*
as percentage of the center frequency and
can thus be maximum 100%. The function
is the same as for 30-01 Wobble Delta
Frequency [Hz].
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 Hz [ 0 - The jump frequency is used to compensate for
*
20.0 Hz] the inertia in the traverse system. If a jump in
the output frequency is required in the top and
3 3
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