Duerkopp Adler 558 Service Instructions Manual page 20

20
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2
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7
b) Cutting before and after sewing
By sewing machines laid out for cutting before and after sewing two
cams on the main control disc control the movement of the clamp
closing lever.
The first cam in the direction of turn conducts the closing movement
for cutting before sewing and the second cam for cutting after sewing.
Two stops, between which the clamp closing lever can be adjusted,
limit the positions.
Caution Risk of Injury !
Pull the mains plug before setting.
–
With clamping plates closed turn the sewing machine out of the
end position with the hand crank until the hook block has turned
360°.
In this position the underthread tension 5 points to the front.
–
Move stop 6 in direction N (see sticker) until touching.
–
Turn the sewing machine out of the end position with the hand
crank until the hook block has turned 360°.
In this position the underthread tension 5 points to the front again.
–
Turn a bit farther until the closing movement of the clamp closing
lever downward starts (for cutting before sewing).
–
Turn farther until the clamp closing lever moves upward again.
With the upwards movement the tip of the tappets 4 must move
past as close as possible to the tip of the angle lever 3. The two
tips may not, however, thereby touch.
–
Loosen screw 2.
–
Set clamp closing lever 1 appropriately.
–
Tighten screw 2 again.
–
Bring stop 7 to touching in direction V (see sticker).
ATTENTION !
The flawless functioning of the clamp closing lever is dependent on the
precise settings of chapters 11 to 15.
If one of these settings is changed, then all settings for chapters 11 to
15 (in this order) must be made.