Most draw frames have contact rollers installed in the creel as stop mo-
tion. The problems with these rollers are known to the industry.
Once the S
liver
W
atch
sensor is installed, a sliver breakage will be detected
and the draw frame will be stopped. Another stop motion is no longer
required.
Sliver breakage stop motion
On lappers up to 24 sensors can be installed in the creel to monitor sliver.
In case a contaminant is detected the lapper is stopped.
A special communication logic avoids the use of long sensor cabling,
which results in an easy, fast and reliable S
liver
W
atch
installation on the
machine.
SliverWatch on lappers
Heather yarns (blends of cotton with 1%, 3%, 5% or more black poly-
ester) can be monitored by S
liver
W
atch
.
Not enough black or too much black polyester in the sliver, makes
S
liver
W
atch
stop the draw frame.
As the position of the PE/CO blend cans versus the pure cotton cans in
the creel is important, S
liver
W
atch
will stop the machine if a can position
is not respected by the operator.
SliverWatch on heather yarns
Production data, such as machine efficiency, produced kg, produced sliver
length, number of can changes, number of production stops as well as
quality stops are available in real time and on shift base.
Statistic evaluation: histogram of defects, number of contaminants per
shift, number of sliver breaks, etc.
Production and quality data
The installation of a S
liver
W
atch
on cards allows the mill to keep track of
the level of contamination in the production.
The purpose here is to monitor the contamination index of the sliver
can.
The contamination index of the can is an expression which relates to the
number of contaminants per 1000 meters of sliver.
Monitoring on cards