Consew 277RFS-3 Datasheet

OP RAT~ON INSTRUCT~ON &, PARTS l~ST
FOR

CONTENTS
i.Brief instruction...................·............................."......................................................................1
2.Main specifications.........................................."......................................................................1
3.Machine installation................................................................................................................1
4.lnstalling the motor
...........................................................................................,......................2
5.Connecting between the pedal and clutch lever..................................................................
..
S.lnstalling the presser foot lift control plate...............................................................................2
7.lnstalling the bobbin winder....................................................................................................3
8.1nstalling the thread stand.................."......" ...........................................................................3
9.0peration preparation............................"............................".................................................3
1
O.Lubrication.........................................................................................................,..................4
ii.Trial running..........................................................." ....................................."......................4
12.lnsialling the needle....................."......................................................................................4
13.Coordination among the needle, thread and material.........................................................5
14.Threading the needle thread................................................................................................5
15. Adjusting the tension of bobbin thread and needle thread...................................................5
is.Winding the bobbin thread and adjustment.........................................................................6
17.Stitch length, forward and backward feed..........................................................0
................. 7
is.Adjusting presser foot pressure........................................................,................................ ..
19.Adjusting the amount of presser foot lift.......................................................................... ..
20.Adjusting the timing of feed..................................................................................................8
21.Adjusting the timing between needle and hook....................................................................8
22.lnstalling the hook positioning bracket and hoolc ................................................................8
i.Machine body....................................................................................................................
9~i0
2.Upper shaft and thread take-up mechanism.................................................................. 11-12
3.Needle bar, rocking shaft, presser foot mechanism...... oo ................ oo .............................. 13-14-
4.Vertical shaft, lower shaft mechanism.............................................................................
15-16
5.Feed mechanism.............................................................................................................17-·18
6.Threading mechanism..................................................................................................... 19~20
7.Accessories ........................................0 ........................................................................... 21

o E 10 I STRUCTIO

1. Brief introducHon
This machine is designed with sliding lever to take up thread
and horizontal hook catch thread, which product lockstitch.
Upper and lower shafts are driven by bevel gears; lever type
stitch regulator, compound feed
by feed dog, needle and
walking foot; high presser foot stroke and lifter, and long stitch
length, cylinder bed, Little running noise, it works well
what-
ever the surface of materials is smooth or roughness. It's easy
for sewing multi-layer leather and materials.
It's
Vlr:idely used for binding sewing on the medium and heavy
weight materials. (such as: handbag, shoes and other cylinder
type materials binding
se\\r:ing)
Unison feed by binder, feed dog, presser feed and needle,
which assures fully binding.
I 3. Machine ins~a!!aHon
1. Location of the machine
The machine must be located on
th~ rigid and flat floor for
ensuring. its smooth operation and reducing its vibration.
Meanwhile, a rubber mat should be inserted between the
machine stand and the floor for further reducing the running
nOIse.
2. Install the base and oil pan(Fig. 1)
First, Align the four screw holes of the machine base with
the ones
of the table and plunge four bolts A and tighten
the nuts. Then put the oil pan on the machine base smoothly.
3. Install the machine head (Fig. 2)
First, half of the hinge should
be made to engage with the
machine base, then put the machine head lightly on the
machine base, move it slightly to align the three screw
holes of the head with the ones of the hinge, insert three
screws A and tighten them.
2JViain specifications
~lication
Medium and heavy weight materials
---
Max.sewing speed
2500s.p.m
---
Stitch leng~h O~6mm
Needle bar stroke
33.2mm
----~
Presser foot lift
8mm by hand
height
l3mm by pedal
._-
Hook
Horizontal hook
Needle
DPx 17 16"-18"
Lubrication
--
Oiied by hand
--
--
-~
Motor power 370W
------------ --
Cylinder dia. 46mm
1
oil pa.n
I
ta.ble
;f/ I ~
2
o o hinge

4.!nstadiing ~he motor (Fig.3) J
'-------~---~-
A
c~
B
Align machine balance wheel belt groove A with motor pulley
belt groove B by moving motor C leftward or rightward.
Be sure that the belt is not touched with the table.
5.Connectting bettween the pedal and the ciutch lever (lFigA)
F:-· -==±=
E-,---I-l-
D---+-t'
C--~
B ___ -+r
A~~~
4
1. The optimum tilt angle of pedal A against floor is approx.
15° .
2. Adjust the clutch of motor E so that the rod B and the
clutch lever C run in one line.
3. When running, the machine balance wheel G should rotate
counter-clockwise observed from opposite side of the
balance wheel. The motor D rotates in the same direction.
Thf rotation of motor can change by reversing the plug of
the motor.
4. Adjust the tension of V -belt by moving motor upward
or downward, The projJer tension of V -belt is a slack of
1O-12mm when the V
-belt is depressed by forefinger.
6Jnsttamng the presser foot mt contro~ piatte (lFig.5)
---c
A
D
E
5 First, the chain
hook A should be connected to the presser
foot lift lever C, then put the pedal assembly D on the stand,
move the control plate E leftward or rightward until the chain
becomes on one line, Tighten the bolts
and nuts, finally,
connect the chain hook to the control plate.

7J ns~ai~ing the bobbin V\f~nder (FiQ]. 6)
Align pulley B of the bobbin V<linder with the outside of the V-
belt C, and there should be a proper clearance between them;
so that pulley B can be touched with the V -belt when latch
thumb lever A is depressed, thereby the V
-belt can drive the
pulley Bwhile the machine running.The bobbin winder should
be parallel with belt slit E of the table, then fasten
two wooden
screws
D.
The thread stand should be located on the right backside of
the table. Threading should be smooth when sewing.When the
machine head is turned backward, it should not be touched
with the thread stand, thentighten the nut
C.
1. Clearing the machine
Before the head is packed, all of the parts of the machine are
coated with anti-rustgrease,meanwhile the grease can harden
and the dust can cover the machine surface during long time
storage and shipment, so, the dust and grease must be cleared
by clean cloth with gasoline.
2. Examination
Although every machine is conformed
by strict inspection and
test before delivery, the parts of the machine may be loose and
deformed afterlong distance transportation with jolt.Athorough
examination must be performed. Turn the balance wheel
slightly by hand to check ifthere is running obstruction, parts
collision, uneven resistance and abnormal noise.
If any of
these exist, adjustment must be made accordingly before
running.
-3-
C-----"'0~
8----\\\\\0
7

'" " Ii>
o 0
-~,:-
I ,
b
1 O.lubrication (Fig,B) J
'------'---
Before running, the machine must be oiled at the places by
arrow shown. If the machine continues in operation, it should
be oiled not less
two times per shift. Please use HA -8 sewing
machine
oil or TJ-70 machine oiL
11 .Tria! running
Trial running is required when new machine is put into use or
use again after storing quite long time. Please lift the presser
foot and run the machine at a low speed of 1000-1500 s.p.m
for
30 minutes, then increase the speed gradually.
9 @Jnstamn
g
the needie (Fig,9)
-4-
Tum the balance wheel to lift the needle bar to its highest
position, loosen the
needle sei screw, and make the needle
groove to the left side of the operator, then fully insert the
needle shank until to the bottom of the needle
bar socket,
tighten the set screw. (Fig 9a)
Note:lnsufficient insertion (Fig. 9b)or the needle groove facing
to the operator (Fig. 9c) is incorrect.

13,
rdination among the ne Ie,
thread and maieria~s
The needle thread should be left-twist, holding the thread by
left hand, twist it by right hand at certain direction (shown as
Fig. 10),
if ii changes .into tight, it's left-twist, contary, it's
right-twist.
Please use DP x 17 16" ~ 18" needle, The needle size should
depend on the materials to
be sewn. If the thin needle is used
for sewing heavy materials, the needle will be broken easily,
and will also cause skip and thread broken. On the contrary,
the materials will be destroyed for the big needle hole, so,
please select proper needle
and thread according to the
materials.
14.Threading the need~e thread (Fig.11)
Tum the balance wheel to lift the thread take-up to its highest
position, then threading the thread from the thread stand.
Threading order as Fig.11: upper cover thread guide A-lihree
-hole thread guide B-lihread tension disc C-l>spring guide
disc D-l>spring
E-lihread guide (upper) F-l>thread take-up G
-lihread guide (upper) F---->cj:h.read guide (middle) H-l>thread
guide Qower) K-l>needle bar thread guide J-l>needle K.
When drawing the bobbin thread, holding the tip ofthe needle
thread by hand,thru the balance wheel to lower the needle bar,
then lift it to ias highest position. Pull the needle thread and
the bobbin thread 'will be drav\Tfi up accordingly, finally, put
the tipe of the needle thread and bobbin thread toward front
under the persserfoot.
15.Adjusting the tension of bobbin thread and needle thread (Fig. 12)
The tension of needle thread and bobbin thread should be
suitable.
The stitch form shown as CD is the best. If the tension
is tightened or loosened, the abnonnal stitch form will be
caused shown as
(2), ®
1. Adjusting the tension of bobbin thread.
The tension of bobbin thread should be adjusted according to
the materials:
CD Turn the balance wheel by hand to lift the thread take-
up to its highest position;
(2) Take down the sliding plate, the screw A is shown as
Fig. 12 (1);
® Turn the screw A clockwise to increase the tension of
bobbin thread;
@ Tum the screw A counter-clockwise to decrease the
tension of bobbin thread;
OeD
X®~~~~~~~
)<@~~~~~~~
11
12

(3)
(2)
Standard clearance Bmm
II/fl---f..-- A
,.,M'----I-- B
2. Adjusting the tension of needle thread
(1) Adjusting the pressure on the thread tension disc:
Adjusting the pressure
on the thread tension disc to change
the tension of needle thread.
As Fig. (2), turn the nut A
clockwise
10 increase the pressure, on the contrary, to
decrease the pressure.
(2) Adjusting the tension of spring
Light materials 20g
Normal materials 25g
Heavy materials 30g
The method ofadjustment as Fig. (3):
Loosen the nut A, turn the spring shaft counter-clockwise to
increase the tension, contrary,
to decrease the tension. Please
use a screwdriver to rotate the spring shaft to get the
required tension.
(3) The swing range of the spring
The spring must be able
to swing, when the thread take-up
is at its highest position, the normal swing range ofthe thread
take-up spring should be:
Light materials
Normal materials over 8mm
about8mm
Heavy materials less 8mm
The method ofadjusting swing range: as Fig (4)
(j) Loosen the presser foot lifter;
(2) Loosen the screw A;
® Tum the disc B counter-clockwise to increase the
swing range, contrary, the swing range decrease.
(j;; Tighten the screw A.
i rELWinding the bobbin thread and adjustment (Fig. 13)
13
A
D
E
The bobbin thread should be neat and tight. If the thread
is weak, please increase the tension of the thread tension
disc
A; if the thread is not neat, please move the bracket C
to adjust it. First, loosen the screw B, if the thread is wound
to one side as Fig
(2), move the bracket rightward; if it is as
Fig ®, please move the bracket leftward until the thread is
wound neatly as Fig. CD, then lighten the screw.
Cote: Nylon or polyester thread should be wound under ligbt
tension in particular,otherwise the bobbin D might be broken
or deformed.Please don't overfill the bobbin thread,otherwise
the thread will loosen dovm from the bobbin. The optimum
capacity of bobbin thread is
fill about 80% of bobbin outside
diameter, and this can be adjusted by screw K

, forward and backwa
Tum the stitch length regulating nut to adjust the stitch length.
When
the graduation on the stitch length regulating block is
aligned with the figure
on the stitch length graduation plate,
the figure is the stitch length
(mm). Lift the reverse feed lever,
the feeding is reverse, release the lever, the machine recovers
normal feeding again.
ed (Fig" 14)
14
ro 0 0
Stitch length Cl Stitch length
regulating block
--~ifWw<:::t:::--- regulating nut
f o
-- Reverse ieed
lever
-,---';----Stitch length
graduation plate
18" Adjusting the presser froot pressure (Fig"15)
Adjust the presser foot pressure according to the materials.
Please increase
the pressure when you sew heavy materials.
Adjust the screw as Fig. 15, first, loose the nut A, then tum
the SCl'ew B clockwise to increase the pressure, contrary,
decrease
the pressure. After the proper pressure is got, tighten
the screw A. Turn the screw C, the pressure can be lightly
adjusted.
Counter-clockwise Clockwise
P.·".'. '. .. ~, .. ,
~
19"Adjusting the amount of presser foot iiH (Fig. 1S)
The method of adjusting the amount of presser foot Mt during
the sewing is:
Loosen the nut A, adjust the center distance B between the
screw A and
upper feed shaft, adjust the distance B short to
increase
the amount of presserfoot lift, contrary, decrease the
amount.The amount should be adjusted within a certain range,
and should not be adjusted too large. After adjustment, tighten
the screw,turn the
upper shaft to check if there is any collision,
begin to use when everything goes well.
-7-
B
/
A
15
16