19
19.1
Setting:
Adjustment:
19.1.1
.2
Bobbin
case
opener
(not on 838)
Position
of
bobbin
case
opener
There
must be a
clearance
of abt. 0.8 mm
between
bobbin
case
opener
finger
and
bobbin
case
base
(Fig.19.0.3). Furthermore,
there
must
be a
clearance
of
abt.
0.5
mm
between
the
top of
the
bobbin
case
position finger
and
the
inner
edge
of
the
bobbin
case
base
(Fig.19.0.2). And, finally,
there
should
be a
clearance
of
abt.
0.3
mm
between
the right
side
ofthe bobbin
case
slot
and
the bobbin
case
position finger
when
the bobbin
case
opener
is at its left point of reversal (Fig.19.0.4).
19.0.2
R
19.0.3
19.0.4
19.0.1
Turn bobbin
case
opener
finger 1
so
that
it
contacts
the
right
side
of
the
bobbin
case
slot.
Push
the
opener
finger against clamp crank 2 located underneath and tighten clamp
screw
3 just sufficiently to allow
the
opener
finger to be turned on Its shaft
against
resis
tance.
Loosen alien
screw
4 of the eccentric bobbin
case
opener
bushing.
29
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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