btsr ULTRAFEEDER, Руководство по эксплуатации

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YTT Device
ULTRAFEEDER - 5.5 -
Stretch Mode (applications:
PANTYHOSE
,
SEAMLESS
…)
In this mode the operator can program a speed ratio between the two devices. This function offers the
following advantages:
•
for elastic yarns it allows you to stabilize the yarn;
•
for rigid yarns it allows you to “stretch” the yarn. Despite having one yarn count on the creel, it is
possible to create a stretch variation and then obtain yarns with different counts starting from one
count.
The following figure shows the correct yarn threading for the Stretch mode.
The stretch ratio can be defined on parameter P2.4
STRETCH YARN
or to increase or decrease the yarn stretch ratio.
[Allowed values -95.0% ÷ +25.0%]. Positive values indicate that the
YTT device motor will turn faster than the ULTRAFEEDER device,
while negative values indicate that the YTT device motor will turn
more slowly than the ULTRAFEEDER device. The value indicated on
the parameter indicates the percentage of speed difference.
Another parameter that can be changed when the YTT device operates in Stretch mode is the parameter P1.5
INC
-
DEC STRETCH
.
With this parameter it is possible to increment/decrement the
resolution of the yarn stretch graduated by INC/DEC external pulses
(Upon every INC/DEC pulse, the stretch ratio will be either increased
or decreased by the amount indicated by this parameter, with respect
to the value set in
STRETCH YARN
)
In this mode it is then possible to modulate:
ƒ the tension only (P1.4 active, P1.5 OFF),
ƒ the stretch ratio only (P1.4 OFF, P1.5 active),
ƒ both tension and stretch ratio (P1.4 e P1.5 both active).
Yarn threading in Stretch mode
YTT/SS