Underthread Gripper By Sub-Class - 211000 And - 241000 - Duerkopp Adler 558 Service Instructions Manual

37. Underthread Gripper by Sub-class - 211000 and - 241000

11 12 13
58
1
2
3
4
5
6
7
8
9
10
After the sewing sequence is completed latch 4, through the movement
of the material support plate, runs onto the operating edge 10 of the
operating piece 6. The feed rod 1 lowers itself onto lever 8. The upper
thread knife 3 connected to the underthread gripper 2 conducts the
cutting movement.
Latch 4 glides on surface 9. The underthread gripper 2 initially moves
back until in the waiting position in front of thread slit 12 in the needle
plate. The underthread gripper 2 must touch with light spring pressure
in front of the face of the needle plate. Thread slit 12 should not yet be
covered in this position.
During the material support plate's run into the end position the
underthread is drawn into the thread slit 12. The latch 4 moves from
the surface 9. The underthread gripper 2 moves 1 mm beyond the exit
of the thread slit 12 and holds the underthread clamped.
With the subsequent turning movement of the hook block the
underthread and gimp are cut on the right clamping plate by the thread
scissors.
Caution Risk of Injury !
Pull the mains plug before adjusting.
Clamping pressure
–
Transport the material support plate with the hand crank so far that
screw 7 is accessable.
–
Loosen lock nut 5.
–
Set screw 7.
The underthread gripper 2 which is under slight spring pressure
should not be blocked in its movement to the back by the needle
plate edge 11.
When gliding onto the face 13 the spring pressure must become
effective.
–
Check the setting by swinging the lever 8 by hand.
–
Tighten lock nut 5 again.
Continued on the next page !