SET
SCREWS
'V;
.
;
i''
^
i
'N
ROTARY
SHAFT
bevel
GEAR
m<//rrmm
Fig. 28. Timing the Loopers
Fig. 29. Needle Eye Aligned with Looper Eye
'V
CiLLL
CLAMPING
r SCREW
Fig.
30. Setting
the
Needle
Bar ot Correct Height
(Low and
Medium
Lift Mochines)
TIMING
THE
LOOPERS
When
needle bar is of
its
lowest position, loopers
should
be
of
end
of
backward
stroke.
Remove bed
slides
(left and right).
Remove
presser
foot and throat
plate.
Loosen two
set
screws on bevel gear shown In
Fig.
28.
Turn machine pulley over toward operator until
needle bar is
at
lowest position.
Rotate rotary shaft, Fig. 28
(now
free of gears)
as
required to
set
loopers at extreme right position.
Tighten one of the
set
screws
on bevel
gear
and
check timing adjustment by turning machine pulley and
observing whether eye of front looper is in line with
needle eye
as
they
pass
each
other on forward stroke
of looper.
If they are not in alignment, check to
see
whether
eye of looper is some
distance
above or below eye of
needle on both
strokes
of looper.
If so, loopers are correctly timed, but needle bar
height is incorrect.
Otherwise,
repeat
timing operation.
Then tighten both
set
screws shown in Fig. 28.
SETTING
THE
NEEDLE
BAR
AT
CORRECT
HEIGHT
Low
and
Medium
Lift
Machines:
262*1.
262-2,
262-20,
262-22,
262-25
Set loopers at gauge distance
from
needles and
time loopers as previously instructed on pages
11
and
12.
Turn machine pulley over toward operator until eye
of front looper
reaches
center
of
needle
on forward
stroke
of looper.
At
this
position,eye
of front looper should be
ex
actly in line with eyeof front needle,as shownIn Fig. 29.
To adjust, loosen needle bar clamping screw, Fig.
30, and raise or lower needle bar as required.
Make
certain
that
needles
on two
needle
machines
are equidistant
from
needle guard
as
previously in
structed.
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