Counter-Blade Cut Pressure - Duerkopp Adler 550-16-23 Service Instructions Manual

7.4 Counter-blade cut pressure

3
6
2 1
Caution: danger of injury
Turn off the main switch.
The counter-blade cut pressure may only be checked and adjusted
with the machine switched off.
Regulation and inspection
The needle and shuttle threads must be severed with the minimum
possible pressure.
Excessive pressure increases wear and reduces the reliability of the
cut.
Adjustment
–
Turn the hand-wheel until the roller 4 can be manually swivelled
into the control cam 5.
–
Undo screw 1.
–
Press the counter-blade with the thread guard 3 lightly onto the
drawing blade.
–
Tighten screw 1.
–
Check the cut pressure and the free movement of the thread cutter
by moving the connecting rod 6 up and down.
–
Test the cut with sewing thread and adjust the setting as required.
NB:
The thread guard 3 must always lie flat on the counter-blade.
5 4
3
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