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Operation
169
Pos: 30.32 /BA/Bedienung /Großpackenpresse/Garnlaufanzeige Oberfaden (Doppelknoter) @ 20\mod_1238741788902_78.doc @ 224916
9.11.2
Twine motion indicator upper twine (double knotter)
Fig. 102
The upper twine motion is monitored by reflectors (twine motion indicator) positioned above the
machine. While the bale is being formed, the twine motion indicator should move back and forth
in a pulsing cycle. All indicators generally rise and lower at the same time except in the event of
a malfunction. A malfunction of this nature is indicated by the fact that the twine motion indicator
that is featuring a malfunction will not be in the same position as the other indicators.
The following malfunctions can be indicated:
The twine motion indicators are staying up:
•
Twine has wound around the knotter hook
•
The needle has not caught the upper strand of twine (twine will not be cut through)
•
The knot has been left hanging on the knotter hook (after the tying is complete, one twine
motion indicator remains down longer than the other)
The twine motion indicators are staying down:
•
Twine tension is too low
•
The upper twine strand is torn
•
The knotter hook has not tied a knot
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BPHS0015
Fig.103
With the Comfort Electronics version the machine is also equipped with an electrical knotter
monitor. In this case each knotter is monitored via a separate sensor (1).
If a knotter malfunction is detected a corresponding error message is displayed on the operating
terminal.
The knotters are numbered from left to right as viewed in the direction of travel from 1 to 4 (BP
890) or from 1 to 6 (BP 1270/1290).
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