Thread Trimmer; Retaining Ring - Duerkopp Adler 550-12-12 Service Instructions Manual

8. Thread Trimmer

8.1 Retaining Ring

1
2
3
At the seam end the thread cutting device is switched on.
After stepping back on the pedal up to the stop the cylinder is operated
by a solenoid valve. The hooked knife is moved out of its clamping and
cutting position to the left.
After ventilation of the solenoid valve the hooked knife with the upper
and lower thread moves back in the clamping and cutting position to
the right again (see illustration). Hereby the threads are clamped under
the clamping plate 2 and cut at the counter knife 1.
During the cutting process the lower thread behind the hook and the
rear thread of the upper thread loop must be caught by the tip of the
moving knife.
ATTENTION !
The cutting process can only occur with the needle bar positioned high.
Only in this position does the retaining ring 5 release the movement of
the retaining pin 4 to the right.
Caution Risk of Injury !
Turn off main switch before adjusting.
–
Arrest the machine head in position B (2 notches visible).
–
Loosen the screws of the retaining ring 5.
–
Set the retaining ring.
The retaining pin 4 should be at the center of the milled section.
The clearance between the retaining pin and the face of the
retaining ring is 0.5 mm.
–
Tighten the screws of the retaining ring 5.
4
5
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