Pfaff hobbylock 783 - Adjusting the Right Overedge Looper

14 Adjusting the right overedge
looper
1 6
Position right looper 1 in
right looper lever 2 to set a
clearance of 6 mm. For this
adjustment use adjustment
gauge (dimension F, see Fig.
46). After adjustment, tighten
screw 3 again.
When the right looper is at
its far left posi tion the
clearance between the looper
eye and the left needle must
be 3.54 mm. For this adjust-
ment loosen screw 4 of the
right looper arm and position
dri ve arm 5 up or down (see
Fig. 47). Adjust, using adust-
ment gauge (dimension C, see
Fig. 48). Afterwards tighten
screw 4 very firmly.
When both loopers cross each
other as shown in Fig. 49 the
clearance between the point of
right looer 1 and the head of
left looper 2 must be from 0.2
to 0.5 mm. To do this, loosen
two eccentric screws 6 of
right looper drive (see Fig.
50). Afterwards turn eccentric
until required clearance is
set. Also, the clearance be-
tween right looer point 1 and
the back of left looper 2 must
be 0.1 to 0.2 mm. To adjust,
loosen screw 3 of right loo-
per. Move right looper forward
or backward. Afterwards tigh-
ten screw 3 again.
Check.
When the right overedge looper
is moving from right to left
and the looper eye has reached
the left needle, the needle
should be positioned as shown
in Fig. 51.
Tolerance.
Needle point in
looper eye.
c
2
Fig. 46
Fig. 48
Fig. 47
4
_-_3--1
E 2
E
N
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I O,2-0,Smm
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Fig. 49
6
o
FIg. 50
Fig. 51
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