Zoje ZJ2628 User Manual
ZJ2628
CYLINDER
BED
SEWING
COMPOUND
OPERATING
FEED
MACHINE
LOCKSTITCH
INSTRUCTIONS
1.
MAIN SPECIFICATION
Sewing speed
Stitch length
Needle bar stroke
Presser foot lift
12.
INSTALL THE MOTOR ( Fig.1 )
Align Motor Pulley Groove (B) and Balance
Wheel Groove (A) by moving the Motor(C) leftward
or
rightward.
2000s.p.m.
0-5mm
33.2mm
7mm (Manual)
14mm(Knee)
Needle
Lubrication
Reverse feeding mechanism
DPX
Auiomatic
Have
13. CONNECT THE CLUTCHLEVER WITH THE PEDAL ( Fig.2 )
1.
The optimum tilt angle
approximately
2.
Adjust Clutch Cover (D) so that Clutch Lever
(C) and Draw
3. The balance wheel should rotate counter-
clockwise when viewed from the outside
Wheel (G). The direction
can be reversed by reversing (tnrning over
the power plug
4.
Adjust the tension
Motor Vertical
of
the V-belt is a slack
depressed at the center
15
degree.
Bar
(B) run the line.
of
of
the motor.
Position Screw (E). The proper tension
of
10-20mm when the belt is
of
the belt by finger.
of
Pedal (A) is
of
Balance
the motor pulley rotation
180 degree)
of
V-belt (F) by tnrning
17 18'-22"
1
14. PREPARATION AND LUBRICATION ( Fig.3 )
l)
Cleaning the machine
Before leaving the factory, the machine parts are
coated with rust-preventive grease, which may
hardened and contaminated
shipment. This grease must be removed with gasoline.
2) Examination
Although each machine is
test before leaving the factory, the machine parts may
be loose
with jolt. A thorough examination must be performed
after cleaning the machine. Turn the balance wheel
see
uneven resistance
adjustment must be made accordingly before run in
operation.
be distributed to each part
causing the parts a seizure.
or
deformed after long distance transportation
if
there is running obstruction, parts collision,
or
3) Oiling
(1)
Required amount
Line (A) on the oil reservoir: Max. oil level
Line (B) on the oil reservoir: Min. oil level
If
oil level goes down under Line (B), oil cannot
2
by
dust during storage and
confirmed strictly and
abnormal noise.
of
oil
of
the machine, thus
If
these exist,
be
to
Always use only
high speed sewing.
before starting operation.
Ci)
Replacing oil
To
replace oil, remove Screw (C) to drain oil.
After
reservoir and securely tighten
reservoir with fresh oil
completely draining
--
__
No.l8
Be
sure to replenish oil to Line (A)
special machine oil for
off
oil, clean the oil
Screw (C), then fill the
-~.
Q:J_~---
l
--
©·-
/;.
...
Is.
REPLACE NEEDLE <
Turn the balance wheel to lift needle
of
upper end
(B) while keeping the long groove
leftward, fnlly insert the needle shank up to the
bottom
Clamp Screw (B).
its stroke. Loosen Needle Clamp Screw
of
the needle socket. Then tighten Needle
Fig.4)
bar
of
the needle(C)
to the
I 6.RUN IN OPERATION (Fig.5)
Run-in operation is required for a new sewing
machine,
a considerable length
arm and replenish sufficient amount
the red oil hole (D).
(I
000-1500spm) to check oil distributing condition
through
30
during which the working speed is increased gradually
and the machine runs sufficiently well, the high speed
2000spm can
work.
or
a sewing machine left out
of
time.
I)
Remove Rubber Plugs (A) on the top
· 2) Lift Presser Foot (B).
3)
Run the machine at a low speed
Oil Check Window (C).
4)
Perform run-in operation at
minutes. After a lapse
be
adopted according to the nature
of
one month
of
operation for
of
oil, and also
I000-\500spm
of
of
service
of
the
to
for
the
I
7.
THREADING ( Fig.6 )
To thread the needle thread, raise needle
upper end
perform threading as shown in Fig.6.
bobbin thread, hold the end
tum
of
its stroke, lead the thread from spoo I
of
the needle thread and
the balance wheel to lower the needle
bar
To
draw the
then to lift
thread and
of
presser foot.
bar
to
the
and
and
·--L-=-
it
to its highest position. Pull the needle
the bobbin thread is drawn up. Put the ends
needle thread and bobbin thread frontward under
cv~~;;::..
Is.
WINDING ADJUSTMENT <Fig.
I)
The wound bobbin thread should
if
tight,
Tension Stnd
bracket.
with little tension, otherwise, Bobbin (D) might break
or deform.
a cylindrical shape as shown in Fig.7 (a), loosen
Screw (B)
Bracket (C) leftward
as shown in Fig. 7 (b), move the bracket rightward, but
if
bracket leftward.
Set Screw (B).
length
This can be adjusted
winder stop latch.
not, adjust the winding tension
Nut
(A)
of
bobbin winder tension
Note: nylon or polyester thread should
2) When the wound thread layer does not present
of
bobbin winder tension bracket and slide
or
rightward.
thread is wound as shown in Fig. 7 (c), move the
After adequately positioning the bracket, tighten
3) Do not overfill the bobbin. The optimum
of
thread will fill about 80%
by
adjusting Screw (E)
be
neat and
by
turning
be
wound
If
thread is wound
of
bobbin capacity.
of
bobbin
1)
Set
----®
a~
19.
SET STITCH LENGTH
I)
Stitch length can be set
2)
The figures on face (B)
in
length
Lever (C) is depressed, and the machine will feed
forward again
mm.
3)
Reverse feeding starts when Reverse Feed
if
Reverse Feed Lever (C) is released.
_by
AND
turning Dial (A).
of
dial show stitch
REVERSE FEEDING (
Fig.8)
Ito. ADJUST THREAD TENSION (Fig.9,10,U)
Generally, the thread tension is
according to the sewing materials and sewing
conditions.
Fig.9 shows different stitch forms.
form should be as shown in Fig.9 (a).
abnormal stitches cause puckering and thread
of
break-age, the tension
be
thread must
In
bobbin thread tension is too weak, as shown
(b),
tum
the needle thread
regulating screw
thread tension (See Fig.
In
case needle thread tension is too weak or
bobbin thread tension is too strong, as shown in Fig. 9
tum
(c),
needle thread
regulating screw
bobbin thread tension.
adjusted accordingly.
case needle thread tension is too strong
the thumb nut counterclockwise to decrease
tension, or tighten
of
bobbin case
the thumb nut clockwise
tension,
of
needle thread and bobbin
10,11)
or
loosen !he tension spring
bobbin case
to
be adjusted
Normal
in
the
tension spring
to
increase the bobbin
to
increase the
to
decrease
stitch
When
or
Fig.9
the
9
a
b
c
ju.
ADJUST THREAD TAKE-UP SPRING
!.Adjustment
Loosen the stopper screw (B) and move the
regulating ring (C) leftwards to decrease the stroke
!he thread take-up spring, or move the regulating ring
(C) rightwards to increase the stroke. Mter. the
adjustment, tighten
2.Adjustment
Loosen the nut
regulating screw (F) clockwise to decrease the tension
of
the thread take-up spring,
screw (F) counterclockwise to increase the tension.
Then tighten the nut (D) and the screw (E).
of
the thread take-up spring stroke
the screw (B).
of
the thread take-up spring tension
(D)
and screw (E) and
or
tum
the
of
tum
the
regulating
(Fig.l2)
u
j12.TIME NEEDLE MOTION TO HOOK MOTION (Fig.13,14)
I.
Adjusting the height
When the needle
normally the measurement between the surface
needle plate and the upper end
20mm.
2.
Time needle motion to hook motion
Before adjustment, set stitch length_ to minimum,
then turn the balance wheel toward you
bar
needle
and allow the needle bar to raise about
its upward stroke. With needle
hook point (A) should be
needle(B), and normally the measurement between the
hook point and the upper end
should be
hook point and the needle hollow should be about
0.05 to O.lmm.
reaches its lowest point. Continue turning
2-2.4mrn, further the clearance between
of
the needle bar (Fig. 13)
bar
is
at its highest point,
of
the needle eye is
2mrn while on
bar
in this position, the
at
the center
of
the needle eye (C)
of
the
until the
of
the
the
0.05 - 0. I nun
1) Lift needle
stroke.
2) Remove the throat plate
needle and bobbin case
3) Loosen Screw (C)
down Hook Positioner (A).
4) Loosen Screw (D)
down the rotating hook
5) Installing the hook can be done in reverse
sequence. Note that Needle (B) and the convex
of
surface
clearance
Hook Positioner (A) should align with a
of
bar
to the highest position
and
feed dog, take down
of
hook positioner and take
of
rotating hook, then take
0.5-0. 7mm between them.
of
its
[1---'
-©
Q.5-
Q.}mm
5
lt4.ADJUST PRESSER FOOT (Fig.l6,17)
1.
Lift adjustment
The normal height
8mm,
yet
it
actual requirement Loosen the pressure regulating
screw(C) and lift the presser
presser foot, loosen the screw (D) and move presser
bar
upwards and downwards to change the lift
presser foot.
NOTE: The changeable lift
will result in the alternate movement height
presser foot (A) and the walking foot (B), therefore,
adjustment must
procedure
2.
Pressure adjustment
Turn pressure regulating screw
increase the pressure
counterclockwise to decrease it
3. Adjustment
presser foot (A) and the walking foot
The presser foot (A) and the walking foot
vibrate alternately with equal height when machine is
in operation,
requirements. To increase vibrating height
walking foot
presser foot (A), adjust as follows: Down the presser
bar lifter and
(A) is slightly separate from
screw (E) and depress the presser foot (A) to reach
needle plate and then tighten the screw
decrease vibrating height
increase vibrating height
balance wheel until the walking foot
separate from the needle plate, loosen screw (E) and
depress the walking foot
then tighten
4.
Movement height adjustment
walking foot
The thickness
the height
foot. The lift should be
the material.
crank rod upwards to increase the up and down
movement, and downwards to decrease it,
nut (H).
5.
Time walking foot (B) to needle
This is
wheel toward you,
the walking foot (B) should
than the needle eye comes to,
raises, the walking foot (B) should leave the feeder
after the needle
reason that the walking foot (B) must tightly hold the
goods while the needle is passing the goods for
avoiding irregular stitches. To adjust this, loosen
two screws (G)
cam
tighten the screws (G).
3 stated below for proper way.
(F) faster
of
presser foot (Fig.l6)
of
the presser foot (A) should
can
be adjusted,
be
of
the alternate vibrating height
but
it can
(B)
and decrease vibrating height
if
necessary, according
bar
lifter to raise the
of
the presser foot (A)
made to
of
the presser foot (A)(Fig.l6)
of
be
adjusted according to actual
it
accordingly. See
(C) clockwise
the presser foot (A), and
if
you
desire.
(B)
(Fig.l6)
of
of
tum balance wheel until the presser foot
the
needle plate, loosen
(E). To
of
the walking foot
of
the presser foot (A): Turn
(B)
to
reach needle plate and
the
screw (E).
of
presser foot and
(Figl7)
of
the material sewn should control
of
the lift
To
the
of
the presser foot and walking
just
enough for clearance
adjuSt, loosen the net
(Figl6)
normal timing when tum the balance
after lowering the presser
reach
the feeder earlier
and
when the needle
eye
has left the feeder. This is due
and
adjust the rotating position
or
slower as may be desired, and
(B)
(H)
then
(B)
is slightly
move the
tighten
bar
of
the
the
of
the
(B)
the
of
the
and
lifter,
of
be
to
to
of
the
the
the
I15.ADJUST FEED DOG(Fig.18,19,20,21)
!.Adjustment
Generally,
When minimizing the stitch length, the center
needle hole on the Feed Dog (A) should align
center
follow:
l)
2)
Shaft Crank (Right) and move the two- Screw
Crank.
3)
center
center
of
4)
screw (D ),(E).
2.
Relative position adjustment between needle
the needle hole in the feed dog. (Fig.20)
Make sure that needle
center
of
l ) Remove
screw (A).
2 ) Holding
center
screw (A) and replace
of
the position
the position
of
the Needle Plate (B).
Minimize stitch length
Loosen the Screw (D)
Turn Feed Rock Shaft( C) and align the
of
the Needle Hole on the feed dog and the
the Needle Plate (B).
After the adjustment, be sure to tighten the
the needle hole,
the arm side cover and loosen the ·
the needle
of
the needle hole in the feed dog, the tighten
of
feed dog (Fig.l8,19)
of
the feed dog should he:
lf
necessary, adjust as
of
the Feed Rock
can
be
descended to the
if
not, adjust it as follows:
bar
and move
the arm side cover
it
of
the
the
(E)of
and
to
the
3.
Time feed motion to needle motion (Fig.2l)
of
The standard timing
the feed dog starts moving forward
the feed and feed lifting eccentric.
0.3-0.5mm.
I
I
motion is that
when
the needlepoint reaches the needle plate surface.
lf
feed motion is not timed to needle motion, adjust
as follows:
l)
Remove the arm side cover and loosen the screw
(A), (D)
turn balance wheel slowly until
on
(F).
feed lifting eccentric (B) and eccentric sleeve (E)
should be
(A),
of
2) Holding feed and feed lifting eccentric (B) and
the feed and feed lifting eccentric aligns with mark
When adjusting, the clearance between feed lltld
After the adjustment, be sure to tighten the screw
(D).
feed motion to needle
the
reference hole(C)
7
21
lt6.
REGULAR CLEANING (Fig.22,23)
1.
Cleaning feed dog
and
clear
Remove the throat plate
lint between the feed and teeth slots.
2.Cleaning rotating hook
Swing out
Wipe the bobbin
the
case
machine
with
head
soft cloth.
off
arid clean the
the
dust
and
hook
PARTS
LIST
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