L-A
'CLAMP
SCREWS
SCREWS
v t \ /-"r*
y.
AYOiDiNG
ECCENTRIC
CRANK
ECCENTRIC
EDGE
35. Timing Needle Avoiding Motion (Various
Parts
Removed
for
Clearer
Illustration)
TAKE-UP
'm-
1 , il
r"
STRAIGHT
J^\
EDGE
> - •
Fig. 36. Looper Thread Take-up Contacting Thread
^^-FASt'V'^^^.SET
SCREW
THRUST
SCREW.
/
n
i.
Fig. 37. Timing Looper Thread Take-up
(Single Take-up Machine)
STRIPPER
PLATE
JjfiGHVT
TAKE-UP.
(LEFT)
il'L STRAIGHT
:
"I^EDGE
Fig*
38. Looper Thread Take-up (Right)
Contaetin
g
Thread
Setting
To adjust, set machine for
maximum
needle avoid
ing motion
as
follows.
Turn machine pulley over toward operator until
crank
is down,
as
shown in
Fig.
35.
Loosen
two
set
screws
in
avoiding
eccentric
and
turn avoiding eccentric until centerline (See Fig. 35)
between
two
set
screws
coincides
with
centerline
on
eccentric
edge of crank. Machine is now
set
for max
imum amount of
needle
avoiding motion.
Minimum
needle avoiding motion is obtained by
turning avoiding
eccentric
over toward operator 90
degrees
from maximum
setting.
Turn
avoiding
eccentric
as
required to
obtain
de
sired
amount
of needle avoiding
motion
and securely
tighten
two
set
screws.
POSITIONING THE
LOOPER
AN EQUAL
DISTANCE
FROM
NEEDLE
To
position
loopers on
equal
distance
in
back
and in front of needles during needle avoiding motion
of loopers, loosen two clomp screws shown in Fig. 35.
Adjust looper holder (See Fig. 44, Page
16)
so
that
loopers
pass
at
an equal
distance
in back of and
in front of needles. Then tighten two
clomp
screws.
TIMING
THE
LOOPER-THREAD
TAKE-UP
Single
Take-up
Machines 262-1, 262-2, 262-20, 262-21,
262-22,
262-25
The
straight edge of looper thread take-up, shown
in
Fig.
36, must contact looper
threads
just
as
loopers
are starting
their
backward
stroke.
Take-up
should then
keep
looper
threads
tout
until
points
of
needles,
on
their
downward stroke,
have
entered
triangles
formed by looper
blades,
looper
threads and needle thread loops, as shown in enlarged
view of
this
area.
Fig.
36.
To
set
looper thread take-up, loosen
thrust
screw
and
set
screw in hub of take-up, shown in
Fig.
37.
Rotate
looper thread take-up toward
rear
of machine
to time take-up to
contact
looper
threads
sooner
(FAST) or rotate take-up toward front of machine to
time take-up to
contact
looper
threads
later
(SLOW).
Slightly tighten
set
screw in Fig. 37. Securely tighten
thrust
screw,
Fig.
37. Then tighten
set
screw
securely.