DURKOPP ADLER 577 Series, Manual

Page: 178 / 202

6 Needle thread scissors
6.1 Function sequence
Phase Flow of movements Position of scissors
Initial position - Sewing basket lift
- The closed scissors are clamping the thread
- Scissors standing behind the needle
(right end position)
Seam start position
(right end position) - Sewing basket lowered
- The closed scissors are clamping the thread
- Scissors standing behind the needle
(right end position)
Release of the thread
clamp after sewing
start - Sewing start,
After the first 4 -10 stitches the thread clamping
will be releasing.
- The release lever (see pos. 1 on page 34)
covers the shears (loosening of the thread
clamping).
Opening the scissors
(left end position) - 5 stitches from the seam end the buttonhole
will be cut up.
- By the descending of the knife block the
scissors will be moved to the left side and
consequently it will be opened.
Catching position - The opened scissors will fall down as soon as
the knife block rises
Cutting
and clamping -With the machine stopped the control cylinder
will be moved out.
- The scissors closing lever will close the
scissors, the thread will be clamped and cut.
- The sewing basket will be lifted.
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