DURKOPP ADLER 540-100-1 Manual Complete page 158

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Hook and needle thread can now be threaded or checked.
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Further measures according to the thread breakage modes
Method A, B or C preset in the technician level (see thread
breakage mode).
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By pressing the ESC-key the thread breakage mode can be ended.
The automat references, the sewing basket is lifted and the
material is released.
Thread breakage mode
There are three possibilities to clear a thread breakage. The respective
method has to be preset in the technician level.
Method A:
The buttonhole has to be undone and re-sewn.
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After switching the automat on again, the sewing basket is lifted
and releases the material.
The automat is now available for a new sewing cycle.
Method B:
The buttonhole is completely re-seamed.
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After switching on again the sewing basket stays down. The
material under the sewing basket remains in position.
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Push pedal forwards to position 2 . Sewing begins.
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After sewing the automat drives to the reference position and the
sewing basket is lifted.
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The material can be removed.
The automat is now ready for the next sewing cycle.
Method C:
The buttonhole will continue to be sewn beyond the detected thread
breakage spot.
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After the automat is switched on again, the sewing basket stays
down. Thus the material under the sewing basket remains in
position.
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Push the pedal forwards to position 2. The sewing basket proceeds
with the material to the thread breakage spot.
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In order to reach the position to continue sewing without having to
sew, use the arrow keys ñ and ò.
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Push the pedal forwards to position 2. Sewing begins.
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After sewing the machine drives to the reference position and the
sewing basket is lifted.
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The material can be removed.
The automat is now ready for the next sewing cycle.
The number of stitches that the thread breakage monitor does not
register before signalling an error is set in the technician level. With
the setting stitch number "0", the thread breakage monitor is
switched off.