2.8 Trimming and clamping device for the needle threads
2.8.1 Function
Caution: Danger of injury!
Switchthemainswitchoff.
Check knife and thread catcher only w ith the sewing unit switched off.
Function
–
The cylinder 2 is switched on after the seam end and during the
feed to the corner knives.
The thread catcher 3 is lowered and takes the needle threads up.
–
After a preset time the thread catcher shoots up.
The needle threads are clamped at the c lamping collar 1 and cut
off by knife 4.
–
After the first s titches of the next seam the clamped needle threads
are released.
–
By means of the springy clamping sheet 1 the thread catcher 3
abuts flat on the knife 4. Thus, the knife is automatically in parallel
position.
Function check
–
Actuate the pneumatic switch at the machine head.
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