Needle-Zero Setting - Duerkopp Adler 579 Service Instructions Manual

12.3 Needle-Zero Setting

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Rule and Control
The needle zero position lies to the left (inside), meaning, the
oscillation of the needle bar is one-sided, that is, during sewing, it
moves from left (inside) to right (outside).
The inner needle entries of the forward and reverse lips must, at the
needle zero position, lie inline (see adjacent illustration).
Set a narrow seam width (see Chapter "Narrow Seam Width").
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Insert a short needle (see Parts List).
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Insert a piece of paper or cardboard as sewing material.
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Sew a buttonhole without cutting the buttonhole.
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With a narrow zero stitch, the inner stitches of the lip must lie
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exactly above one another.
Correction
Loosen screws 7 and 8.
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Push the swing sleeve 6 up or down.
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Tighten screws 7 and 8.
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Sew another buttonhole and check if the inner stitches of the
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forward and reverse lips lie above one another.
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