Reliable MSK-8400BL-18 Bedienungsanleitung

MSK-8400BL-18

MSK-8420BL-18

Industrial Sewing Machine

Instruction Manual

CONTENTS

1. Brief introduction 1

2. Main specifications 1

3. Machine installation and operation preparation 1

1. Machine installation 1-3

2. Operation preparation and notice before running 3-4

4. Machine operation 5-6

1. Coordination among needle, thread and materials 5

2. Install the needle 5

3. Winding the bobbin thread 5-6

5. Machine adjustment 6-9

1. Adjust the needle thread tension and bobbin thread tension 6-7

2. Adjust the pressure of presser foot 7

3. Adjust the safety clutch device 7-9

1. MSK-8420BL-18 machine casting components 10-13

2. MSK-8400BL-18 machine casting components 14-17

3. Upper shaft and presser foot components 18-19

4. Needle bar and lower feed components 20-23

5. Lower shaft thread looping components 24-25

6. Stitch length adjustment components 26-27

7. Knee lifter and winding components 28-29

8. Lubrication components 30-31

9. Accessories 32-33

Operation instruction

Parts manual

Operation instruction

MSK-8420BL-18

MSK-8420BL-18 machine adopts straight double needle

and two vertical auto-lubricating hooks for thread

looping, sliding lever for thread take up to form two

lines of lockstitch seam. The upper and lower shafts

are supported by needle bearing and driven by

toothed belt, plunger oil pump lubrication system,

compound feed mechanism of feed dog, walking

foot and needle, so even if for long stitch length or

sewing long materials, it can deal with them freely.

MSK-8400BL-18 sewing machine adopts single

straight needle and vertical auto-lubricating hook for

thread looping, it has all of the advantages of

MSK-8420BL-18.

Both of the models are widely used in the factories

of suitcase, tent, cushion, leather goods, apparel,

mat, etc.

MSK-8400BL-18

Medium and heavyweight materials

1200s.p.m

9mm

36mm

8mm by hand

More than 16mmby pedal

Large vertical auto-lubricating hook

DP 17 Nm125 180

6.4mm (standard)

Auto-lubricating

Special needle gauge available (mm):3.2,4,4.8,8,

9.5,12.7,16,19,25.4.

Applications

Max. Sewing speed

Max. Stitch length

Needle bar stroke

Presser foot lift height

Hook

Needle

Needle gauge

Lubrication

Model

1. Machine installation

1.1 Location of the machine

The machine must be located on the 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 therunning noise. .

1.2 Install the oil pan (Fig. 1)

Put the oil pan into the table cutout and place the

four cushions on the four corners of the cutout,

finally fix the cushion and oil pan on the table by

nail. .

1.3 Install the machine head (Fig. 2)

Make the hinge A of machine head engaged with

hinge socket B on the table, then turn the machine

head till it is seated on the frame of table cutout,

please keep theturning freely. .

1.4 Install the presser foot lifting controller (Fig. 3)

First connect the chain B with presser foot lift lever

C by hooks A, then install the pedal assembly D on

the rung of the stand, move the controller E leftward

or rightward to make the chain in one line, fix it

with bolt and nut, finally connect the hook with the

controller E.

(An automatic presser foot lifter is also available,

please refer to parts manual Part 7. "Knee lifter and

winding components")

1.5 Install the thread stand (Fig. 4)

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, then tighten the nut A. .

1.6 Install the motor (Fig. 5)

Move the motor C leftward or rightward to make the

hand wheel belt groove A and motor pulley belt

groove B runin line. .

20 ~30

10~12mm

1.7 Connecting the clutch lever to the pedal (Fig. 6)

A. The optimum tilt angle of pedal against floor is

approx. 20 30 . .

B. Adjust the clutch of motor so that the clutch lever

C and drawbar B run in line. .

C. The machine hand wheel should rotate

counter-clockwise for normal sewing when view

from opposite side of balance wheel. The motor

should rotate in the same direction. The rotation can

be reversed by reversing the plug of motor (turn

over 180 ) .

D. Adjust the tension of V-belt F by moving the

motor up and down. The proper tension of V-belt is

a slack of 10 12mm when the belt is depressed at

the belt spanby finger. .

2. Operation preparation and notice before running

2.1 Clearing the machine

Before the head is packed, all of the parts of the

machine are coatedwith anti-rust grease,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 withgasoline. .

2.2 Examination

Although every machine is conformed by strict

inspection and test before delivery, the parts of the

machine may be loose and deformed after long

distance transportation with jolt. A thorough

examination must be performed. Turn the balance

wheel slightly by hand to check if there is running

obstruction, parts collision, uneven resistance and

abnormal noise. If any of these exist, adjustment

must be made accordingly before running. .

2.3 Notice before running

A. Oiling (Fig. 7)

Oil amount should be filled according to the marks

in the oil pan, Mark A refers to the highest of oil

amount; Mark B refers to the lowest, be careful that

the oil amount should not be lower than Mark B,

otherwise the machine parts can not be fed with oil

and cause overheat and collision. .

Please be sure to use machine oil 18# or HJ-7.

B. When the machine starts for initial time or reuse

after a long time, the proper oil amount should be filled

in the sections of machine shown by arrows in Fig. 8,9.

When it is in operation, please observe the oil sparking

in oil screen to check the oil condition. .

C. When a new machine starts running, for extending its

lift, please run at a medium and low speed (1000s.p.m)

for about a month and then raise the speed gradually.

D. Please turn off the power when it is not in use or the

operator leaves away from it.

E. Replace the oil every month, when replacing, fully

drain off the old oil in the oil pan and add the new one.

F. For MSK-8420BL-18, the needle gauge options are: 6.4,

3.2,4,4.8,8,9.5,12.7,16,19,24.5mm. To get it, the needle

plate, inner and outer presser foot, needle holder, feed

dog, left and right sliding plate, thread guide should be

changed, the standard needle gauge is 6.4mm, for the

other needle gauge, the relevant parts can be ordered

from the factory.

1. Coordination amongneedle, thread and materials

Please use needle DP 17 or 135 17, Nm125 180, the

coarseness of needle should be in accordance with the

nature of materials. If stitching on heavy weight

materials with a slim needle, the needle will be broken

easily. Needle skipping or thread breakage will also

occur. On the contrary, stitch on tightly materials with a

very coarse needle, the materials will be destroyed

because of over-big needle hole, so the needle and

thread should be properly selected. .

2. Install the needle (Fig. 11)

Turn the hand wheel to lift the needle bar to its highest

position, loosen the needle set screw A, fully insert the

needle shank up to the bottom of needle holder, keep the

long grooves of the two needles opposite with each

other, thentighten the set screw as shown in Fig.(a), For

single needle, keep the long groove of needle facing the

left of the operator as shown in Fig.(b).

Note: Fig.(c) insufficient insertion or Fig. (D) wrong

direction of needlegroove is incorrect.

Oil screen

Single

needle

Clearance

Long groove leftward

ABABA

3. Winding the bobbin thread

3.1 The method of winding

Insert the bobbin B into winder shaft, threading the

thread A to upper and lower holes of pin E, then to

thread tension disc F, draw the thread tip and wind

thread several circles around bobbin B, put the

winding lever D into bobbin B, then it can automatic

winding when sewing. (If only winding, not sewing,

please lift the presser foot.)

Please don't overfill the bobbin thread, otherwise the

thread will loosen down from the bobbin. The

optimum capacity of bobbin thread is fill about 80%

of bobbin outside diameter, and this can be adjusted

by screw D. After finish, thread can be cut by thread

cutter shown in Fig. 12. Wind the thread A several

circles around cutter C, draw the thread and the

thread is cut.

3.2 Threading (Fig. 13)

A. Every thread should be drawn through thread hole

A, when using light and smooth thread (polyester or

long silk thread), it should be drawn through thread

hole B.

B. Keep the thread take-up lever at its highest

position, threading the needle thread in the following

numerical order.

3.3 Stitch length (Fig.14)

The stitch length can be regulated by stitch length

dial A. Turn it counter-clockwise to expand its

length and clockwise to shorten its length. The

numbers on dial show the sizes of the stitch length in

mm.

For reverse feed, press down feed lever B to perform

reverse sewing. Release the lever, the feed lever can

reset automatic and the forward sewing is resumed.

Thread

Detailed picture

3.4 Placing bobbin (Fig. 15)

Note: when bobbin is placed into the bobbin case, the

thread should be wound properly in the correct direction

shown in thefigure. .

3.5 Drawing thread from the bobbin (Fig. 16)

A. Draw the thread end to bobbin slot shown in the

figure, and pull it out down through the inner bobbin

stop piece.

B. Hold the thread end with left hand, turn the hand

wheel slowly and get the bobbin thread, then draw them

a little apart from thepresser foot.

1. Adjust the needle thread tension and bobbin

thread tension

All forms of stitches are shown in Fig. 20

The normal stitch of sewing machine is shown in Fig.

17A. If stitch is abnormal, the puckering and thread

breakage will occur, the needle thread tension and

bobbin thread tension should be adjusted so that the

normal stitch can be obtained. .

Normal stitch seam

Needle thread too loose or bobbin thread too tight

Needle thread too tight or bobbin thread too loose

Inner stop piece

Thread

Hook

Hook Sliding plate

Sliding plate

A. If the stitch seam shows as Fig. 17B, indicates

that the needle thread tension is too tight or the

bobbin thread tension is too loose. Please turn the

thread tension nut counter-clockwise to release the

needle thread pressure; or turn the bobbin lace

adjusting screw with a screwdriver to increase the

bobbin thread tension.( See Fig. 18,19)

B. If the needle thread tension is too loose or the

bobbin thread tension is too tight shown as Fig. 17C.

Please turn the thread tension nut clockwise to

increase the needle thread pressure; or turn the

bobbin lace adjusting screw with a screwdriver to

decrease the bobbin thread tension. (See Fig. 18,19)

For special sewing with special thread, the tension

needed can be obtained by adjusting the power and

stroke of the thread take-up spring.

The pressure of presser foot should be adjusted

according to the thickness of the sewing materials. If

stitch on heavyweight materials, thepressure should

be increased by turning the pressure adjusting screw

on the back of machine head clockwise, on the

contrary, turn it counter-clockwise. .

2. Adjust the pressure of presser foot (Fig.20)

The function of safety clutch device is to prevent the

hook and toothed belt from being damaged when the

needle thread is drawn into the hook for abnormal

load during the operation. .

3. Adjust the safetyclutch device

3.1 The function of safety clutch device (Fig.21)

A. When the safety clutch is functioning, thetoothed

belt will remove the load and the hook shaft will stop

rotating, only the upper shaft still rotates, and the

machine stops work.

B. Clean off the needle thread which is draw into the

hook.

C. Turn the toothed belt shaft by hand to check if the

hook shaft can turn smoothly, then reset the safety

clutch device.

Adjusting screw

Loosen

Tighten

Nut

Increase

Decrease

Increase

Decrease

Pressure adjusting

screw

Safety clutch device

Toothed-belt pulley

Shaft

Stopper

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