Consew 244B Manual

MODELS: 244B 244RB 254B 255B 255RB
254RB 254BH
ONSEIN
OPERATOR'S GUIDE
FLAT BED SEWING MACHINE
LUBRICATION (USE WHITE SPINDLE OIL)
1. To fill oil reservoir on toP of machine until oil level reaches to upper reference line A. Always keep oil level is above
lower reference line B. (Fig.1)
2. Oiling for hook mechanism: Open slide plate on bed and pull out oil gauge.
Fill oil Into reservoir for hook mechanism up to level reference mark on the gauge. (Fig. 3)
3. When star.ting the machine Initially and after kept away for a long time without using at all, oil sufficiently to re-
spective necessary parts indicated by arrow before starting operation and pre-running. (Fig. 2, 4 and 5)
Oil filler hole
Fig. 1
----.---.-.---...-.---.---
Fig. 4
Fig. 2
Oil filler hole
Fig. 3
Fig. 5

OILING ADJUSTMENT FOR UPPER PART (Fig. 6)
Point
Fig. 6
While operating machine, lubrication to each spots of
upper part of machine are made automatically. When the
machine Is In continuous. operation, stop oiling for a while
at your option. In that case, turn dial until two points fit
together, then the dial comes down and the lubrications
are stopped.
OILING ADJUSTMENT FOR HOOK
MECHANISM (Fig. 7)
Refrence line
Fig. 7
The maximum 011flow is available when reference
line on 011adjusting knob Is In a line with point on
hook saddle. While It stops when the reference line
is upright: .
To adjust, loosen pinch screw and turn 011adjusting
knob, then tighten the pinch screw after adjustment.
NEEDLES STANDARD NEEDLE
Long
groove
Fig. 8 (One needle) Fig. 9 (Two needle)
Needle
set screw
Needle
Long
groove
DP-F22#16... LSW-6LG, LSW-7LG.
DPX17#22... 254B, 254RB-l, 255B,
255RB-l, 333B, 333RB-l,
339B, 339RB-1.
DPX17#24... 254BH, 254RBH-1.
1. Move needle bar to highest point.
2. Insert needle up as far as possible.
3. Long groove faces left (In case two needle machine,
the long groova faces Inside).
4. Then, tighten needle sat screw.
ROLLER PRESSER FOOT (Fig. 10)
(LSW-6LG,6LG-T.6LG-TA.7LG,7LG-T,7LG-TA )
Fig. 10
Lift up prll96ar bar lifter, and press down presser foot
saddle and turn It to left.
To return, turn It to right.
WINDING BOBBIN
1. Place bobbin on spindle as far as It will go.
2. Laad thraad as shown by Fig. 11 and wind several
times on bobbin.
3. Press down lever for drive then start machine. Pulley
will be dlsangaged from V-belt automatically after
bobbin fills up with thread.
o Winding
strangth:
Adjustable
by serrated
nut.
Screw (2) Fig. 11 o Uneven winding:
Adjustable by loosen-
ing screw (1) and move
winder to right or to
left.
o W!ndlng amount:
Adjustable by scraw (2)

BOBBIN REMOVAL AND REPLACEMENT
STANDARD TYPE .WITH CAP
Latch
Latch 1. BOBBIN REMOVAL
Pull uplatch,and bobbin
comes up.
2. BOBBIN
REPLACEMENT
Place threaded bobbin
Into case and press down
the latch. At this time,
make oure the bobbin
turns to left (counter-
clockwise), puliling 1:he
thread.
Tension regulating spring
Fig. 13 - Fig. 14
1. BOBBIN REMOVAL
Pull up latch and remove cap and bobbin.
2. BOBBIN REPLACEMENT AND THREADING
Place threaded bobbin Into cap. At this.tlme, make
sure bobbin turns to right (clockwise). Then, pull
out a length of about 5 cm of thread, guide the
thread Into slot and pull the thread to left, under
tension spring. Place the cap with bobbin into
hook and press down the latch.
3. THREADING BOBBIN
Guide thread into slot and pull the thread betwaen
bobbin case and opener, and pass thread inside of
tension spring. .Leave about 5 cm from needle plate
and close slide plate lightly.
THREADING NEEDLE
ONE NEEDLE TWO NEEDLE
7.G
Fig. 15
o Raise needle bar to highest point and lead thread
from thread stand the numerical order.
Thread needle from left to right.
o A (pre-tension disc) is oniy for LSW-6LG, 7LG, T,
TA type.
o Raise needle bar to highest point and lead thread from
thread stand the numerical order (1 -11 for left needle)
and the alphabetical order (A -K for right needle).
Thread needle from outSide to inside.
THREAD TENSION NEEDLE THREAD
Needle
U
~thread
~-Material --- Bobbin
Perfect stitching thread
Tight tension of needle thread
Loose tension of needle thread
Fig. 17
Fig. 18
To adjust, turn serrated nut
BOBBIN THREAD
(Standard type)
Regulating screw
To adjust, turn adjusting screw
6.F
5.E
S.H
8it 49./
910
.l'

TO REGULATE PRESSER FOOT PRESSURE
y~-"'=~_:
(
More (-r
..1])..
"Less
'-l'
g:;.:<.
!(::~.:.~'4
~
~:~_~.~~.:=:.:~::.~=:-:.-f~:,=~::===-:--=:_.=--=-=~-
Fig. 21
The pressure on the material should be as light as
possible, while stili sufficient to Insure correct
feeding.
ADJUSTING LIFT OF ALTERNATING
PRESSER FEET
(Compound feed mechanism only)
To adjust, Loosen wing nut and move link and
stud assembly along slot.
ADJUSTING STITCH LENGTH REVERSE STITCHING
(onjy with reverse mechanism)
Number
(stitch/Inch)
Fig. 23
Pressing down button A, turn pulley slowly toward
.you. Then plunger will enter Into notch In feeding
mechanism. Hold the plunger down and turn
pulley either forward or rearward so that desired
number on pulley may come at mark on arm.
Then, release the plunger.
.~_."
,. .
Press down lever as far as It will go.
RE.sET SAFETY CLUTCH MECHANI$M
Fig. 25
..-
1. Remove any foreign matter which may have lodged
In hook. Do not use any sharp.edged tools.
2. Pressing button B and turn pulley rearward slowly
to return safety clutch.
Operating pressure of the safety clutch can be changed.