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Seiko CH-2B - (D) Timing of Needle and Hook; Positioning of Needle and Tip of the Hook; Adjusting the Height of Needle Bar; Adjusting the Position of the Tip of Hook

Seiko CH-2B
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(C) Adjusting
the
Forward
and
Backward Position of Needle Bar Frame
Correct position
between
needle
bar
frame
and
presser
bar
is
determined
by
the
distance
between
presser
bar
and
needle
bar
being
16mm
under
the
stitch length being "0"
mm.
(D)
Timing
of
Needle
and
Hook
Adjustment
of
the
clearance
between
presser
bar
and
needle
bar
is
to
be
made
by
the
screws
(1).
Positioning
of
needle
and
tip
of
the
hook
When
the
needle
bar
has
risen
4.5mm
-
5.5mm
from
its
lowest
position,
the
tip
of
the
hook
should
meet
the
center
Line
of
the
needle.
2.5imD~3nn
U
4.5inD~5.5min
Distance
between
the
upper
tip
of
the
needle-eye
and
the
tip
of
the
hook
shall
be
2.5mm
-
3mm.
Adjusting
the
height
of
needle
bar
Loosen
the
screw
of
bar
connecting
stud
(2) by
wrench
which inserts to
the
hole (1) of
arm
and
adjust
the
needle
bar
(3)
(
upward
and
downward.
Adjusting
the
position
of
the
tip
of
hook
Loosen
the
screw
(5) of
the
shaft
crank
by
the
spanner
which
inserts
to
the
hole
(4) of
the
head,
then
determine
the
forwardness
or
backwardness
(high
speed
or
low
speed)
of
the
tip
of
hook.
Tighten
the
screw
(5)
after
adjustment.
- 8
From the library of: Superior Sewing Machine & Supply LLC

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