4
When both the sewing hook and the needle are at the position indicated in par. 2.6
above, the bottom edge
of
the
hook
point should be positioned about
1.5
mm
or
1116
inch above the top
of
the needle eye.
If
adjustment is required, loosen the setscrew
in the needle bar connecting stud and set the needle bar higher or lower, as
appropriate. Then tighten the setscrew securely again.
5 Setting hook to needle:
With the needle
bar
set at the correct height and risen the required distance from the
bottom
of
its stroke, there should be a clearance
of
about
0.1
mm
or
.004 inch
between
hook
point and needle (which equals the thickness
of
a piece
of
paper).
To
adjust, reposition the hook saddle and the large bevel gear.
6 Adjustment
of
the needle guard
Having set the hook to the needle as instructed above, the latter should contact the
needle guard lightly without being deflected.
To
this end, the needle guard should
be bent accordingly.
7 Bobbin case opener
7 .1. Insert the bobbin case base into the sewing hook.
7.2.
Screw on the needle plate, making sure though that the position finger
on
the bobbin
case base enters the recess in the needle plate.
7.3. Loosen the set screws to the right or left
of
the sewing hook and adjust the bobbin
case lever fulcrum on the hook saddle so that the bobbin case base is rotated
counter-clockwise, lifting it clear
of
the stop in the needle plate recess by
half
its
amount
of
play. Tighten the screw securely again.
7.4. Check and correct this setting after threading the machine. As you do this, make
sure that the bobbin case opener opens a clearance gap for the thread to slop through
be
7.5.
By
no means must the bobbin case opener rotate the bobbin case base so that it
strikes the opposite stop in the needle plate recess.
4
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