Duerkopp Adler 579 Operating Instructions Manual page 4

6
The use of step motors confers great versatility. No use of control
–
cams.
One-pedal operation for the following functions:
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- close/open clamps
- switching on the sewing process
- rapid halt with needle lift
Pneumatically-operated thread-trimming system with short drive
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distances for precise operation.
Pneumatic buttonhole slit.
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Central oil-wick lubrication from two oil reservoirs.
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Simple cutting-block replacement.
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Seam-width alteration in the cross tack.
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The special design of the machine arm permits the use of a
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different material holder (optional extra) enabling the material to be
placed lengthwise.
Smooth design with casing. A gas-pressure spring helps to swing
–
the machine up and ensures that the head does not swing down
too quickly.
Vertically-operating cutting-block holders mean that no finishing-off
–
work is necessary even with different cutting-block heights.
After the material has been released a display setting enables the
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cloth carrier plate to move to the starting position for the next
buttonhole, which improves visibility for material positioning.
Controller
A counter, shown in the display, counts the number of buttonholes
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sewn.
A number of parameters can be set on the BF 2A operating panel,
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depending on the subclass and buttonhole shape. These include
the following:
- with or without eye
- speed max. 2200 rpm
- buttonhole length, various ranges depending on the subclass
- cut before or after sewing
- no cutting
- stitch count in the eye
- stitch distance
- taper tack overlap
- taper tack length
- overlap in round tacks and eyelets
- overlap in the round tack
- number of stitches in the round tack
- stitch distance in the cross tack