Height - Clearance - Angular Position Of Lower Looper - ELNA 745 Service Manual

HEIGHT-CLEARANCE-ANGULAR POSITION OF LOWER LOOPER
1. Remove: Mains lead - Sewing foot
2. Make sure that there is no axial play on looper shaft "x".
3. Loosen screw "a", adjust height of lower looper as shown and tighten screw "a".
4. Adjust clearance of overlock needle guard.
5. Insert a new needle (No.90) in R1 and check height and orientation of needle bar.
6. Remove needle plate and machine base.
7. Loosen screw "b" just enough to be able to shift lever "c".
8. Adjust lever "c" axially to obtain a clearance of less than 0.05mm between point of looper
and needle.(See Fig.2)
9. Turn the handwheel towards you and bring lower looper to its far left swing position and
adjust lever "c" angularly to obtain 2.8 to 3.1mm between point of looper and the left side
of the overlock needle.(See Fig.1)
10. Recheck clearance and carefully tighten screw "b".
a
2mm
0.05 mm
Fig.2
x
2.8mm
2.8~3.1mm
R1
c
Fig.1
6
b
3mm