19.2
Setting:
Adjustment:
19.2.1
.2
.3
.4
Timing
the
bobbin
case
opener
When the needle bar isat a position2.0 mm
beyond
b.d.c. (pininhole "1")the opener
finger must be at its right pointof reversal (Fig. 19.0.6).
€)
O
1—
19.0.6
19.0.5
Loosen
the
three
screws
1 of bobbin
case
opener
eccentric
2.
Tighten the central
screw
1 just sufficiently to allow eccentric 2 to be turned on its shaft
against
resistance.
Bring
the
needle
bar
to a position
2.0
mm
beyond
b.d.c.
and,
in this position,
insert
the
pin in
hole
"1" (to block
the
machine).
To facilitate determining the
exact
point of reversal insert a small screwdriver in the
slot of
the
clamp
of
opener
finger 3.
Turn
opener
eccentric
2 until
opener
finger
3 is
at
its
right
point
of
reversai
(Fig. 19.0.6).
Pull
the
pin out of
the
hole
in
the
bearing
plate.
Tighten the central
screw
1 first, then the two outer
screws
1.
Pull
the
screwdriverout of
the
clamp
slot of
the
bobbin
case
opener
and
check
this
adjust
ment
(see
"Setting").
31
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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