Repairing the knitting machine 7
Needle selection displacement 7.6
354
7.6 Needle selection displacement
Condition:
Operating system of the knitting machine: Operating system OKC V 2.5
(or higher).
With this test the interaction of the impulse sensor, the control unit and the
different selection systems is synchronized. This takes place with the help
of test series. With different reaction times it is checked whether the needles
are driven out to the "stitch" position for knitting or not. You have to check
this in both carriage directions. You enter these test results in a table. From
these test results the optimum reaction time is calculated.
The needle selection displacement is carried out with the following steps:
Preparations [-> 355]
Reset reference values of impulse sensor, carry out carriage reference
run [-> 356]
Determining the needle selection displacement manually [-> 357]
Time required
Manually:
If you carry out the test series manually, you will need
between 2 and 4 hours depending on the machine gauge.
Automatic:
The measuring system "JNA" (Setup-Needle-Selection) is
available at your agency or at Stoll. With this measuring
system the test series are carried out automatically. Time
required: 30 - 60 minutes.
"JNA" measuring system
With the "JNA" measuring system you will get instructions on
how to carry out a needle selection displacement.
You do not need to carry out the section "Determine manually
the needle selection displacement" of this instructions.
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