Drawing Sliver protocol test
Before running the test, the menu 20.3 should be set with the
leveling intensity at 99.0%. Also the “adaptation fiber type” should be
entered.
Produce
drawn sliver with the normal (n) number of doublings and take 3 samples of 10 m
each. Weigh each sample and determine the g/m or grains/yard. Calculate the
overall average weight.Produce sliver with one less sliver (n–1) in the feed
and calculate the overall average. Produce sliver with one additional sliver
(n+1) in the feed and calculate the overall average.
Use the
chart in the machine manual, and follow the suggested procedures to find the
percentage of “Under compensation” or “Over compensation”.Adjust the leveling
intensity value in 20.3 of the menu.Repeat the sliver test with the new
leveling intensity value and correct if necessary.
Exceptions:
If a
sliver test reveals an over compensation and an under compensation, of the
leveling device then one of the following could apply:
The wrong
size scanning rollers are installed,The pressure of the scanning rollers is
wrong for the application,The scanning roller is not able to move freely
throughout its full range.
Sliver
protocol test (example) The following
protocol is taken from the machine manual and can be used as a guideline.
Material correction factor
This setting is also referred to as the “Adaptation fiber type” and is used to ensure that the system will function effectively at both running and jog speeds. Three, ten meter, samples should be produced at:Normal delivery speed and Slow speed by using the jog button (T) Compare the sliver weights.If the sliver produced at slow speed is heavier than that produced at normal speed, the material correction factor should be increased.Re-check and continue to adjust until the difference in sliver weight is < 0.5%
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