Fitting And Removing The Blades - Duerkopp Adler 743-221 Service Manual

3.1.1

Fitting and removing the blades

S30
22
1
2
3
4
5
S31
S28
6
The blades must be replaced and adjusted with the thread clipper
removed. The thread must be reliably severed with the minimum
possible pressure.
Regulation and inspection
The distance from the edge of the fixed blade 12 to the surface of the
body of the clipper is 1.5 mm.
The edge of the moving blade is just beneath that of the fixed blade.
This is the case if the distance from the edge of the blade to the
surface of the body of the clipper is 2 mm.
Caution: danger of injury
Turn off the main switch.
The thread clipper may only be removed with the sewing machine
switched off.
Blades may only be fitted and removed when the thread clipper has
been removed.
Removing the blades
–
Remove thread clipper (see section 3.1).
–
Remove screws 3 and 5.
Remove cover plate 1 and blade-guide plate 6.
IMPORTANT !
Do not lose the pressure spring 4.
–
Remove moving blade 2 downwards from the blade-guide plate 6.
This is necessary to ensure that the blade is not damaged.
–
Undo screws 15 and 17.
Remove the pressure plate 16.
–
Remove blade 12 (fixed blade).
Position markings S28, S30 and S31 (compressed-air connections)
denote the respective solenoid valves.
1 7