453
Repairing the knitting machine 7
Needle selection displacement
Needle selection displacement
7.6 Needle selection displacement
Condition:
Operating system of the knitting machine: Operati
ng 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 displacemen
t is carr
ied out with the following steps:
Setting the impulse sensor type
[454]
Preparations [458]
Reset reference values of impulse sensor, carry out carriage referenc
e run
[459]
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-Selec
tion) is
available at y
our 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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