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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 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.
30-00 Wobble Mode
Option:
Function:
The standard speed open-loop mode in par.
1-00 is extended with a wobble function. In
this parameter, it is possible to select which
method to be used for the wobbler. The
frequency 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 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., U/
D Time
[2]
Rel. Freq.,
Abs. Time
[3]
Rel. Freq., U/
D Time
FC 300 Programming Guide
NOTE!
This parameter can be set while running.
NOTE!
The setting of "Center Frequency" takes place via the normal
reference handling parameters, 3-1*
®
MG.33.MA.22 - VLT
is a registered Danfoss trademark
30-01 Wobble Delta Frequency [Hz]
Range:
Function:
5.0
[0.0 -
The delta frequency is determining the
Hz
25.0 Hz]
magnitude of the wobble frequency. The delta
*
frequency is superimposed on the center
frequency. Parameter 30-01 is selecting both the
positive and negative delta frequency. The
setting of parameter 30-01 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
parameters 3-1*.
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 par. 30-01.
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
3
3
3-141
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