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manual abstract
Main specifications 1 3. Installation and preparation 1 3.1 Installation1 3.1.1 Location of the machine1 3.1.2 Installing oil reservoir1 3.1.3 Mounting machine head1 3.1.4 Mounting knee lifter2 3.1.5 Installing the motor2 3.1.6 Connecting the clutch lever to the pedal3 3.1.7 Installing the thread winder3 3.1.8 Installing the thread spool stand 3 3.2 Preparation3 3.2.1 Cleaning the machine3 3.2.2 Examination4 3.2.3 Precaution before start 4 4. Operation 5 4.1 Coordination between needle thread and sewing material5 4.2 Installing the needle5 4.3Winding the bobbin thread5 4.3.1 Winding method5 4.3.2 Winding adjustment6 4.3.3 Threading6 4.3.4 Stich length and reverse sewing control6 4.3.5 Setting the bobbin7 4.3.6 Drawing thread from the bobbin 7 5. Machine adjustment 7 5.1 Thread tension adjustment7 5.2 Adjusting the pressure of presser foot8 5.3 Use and adjustment of the safety clutch device8 5.3.1The function of the safety clutch device8 5.3.2 Resetting the safety clutch device8 5.3.3 Regulating the strength on the safety clutch device9 5.4 Upper feed adjustment9 5.5 Presser foot lift volume adjustment10 5.6 Hook oil amount adjustment Parts manual 1. MSK-8420B Arm parts 11 14 2. MSK-8400B Arm parts 15 18 3. Upper shaft and presser foot parts 19 22 4. MSK-8420B Needle bar motion and Lower feed parts 23 26 5. MSK-8400B1 Needle bar motion and Lower feed parts 27 30 6. MSK-8420B Rock shaft and thread looping parts 31 34 7. MSK-8400B Rock shaft and thread looping parts 35 38 8. Stitch length adjusting parts 39 40 44 10.MSK-8420B Lubrication parts 45 9. Knee lifter parts 41 48 11.MSK-8400B Lubrication parts 49 52 12.Accessories 53 54 1. Brief introduct on i Both the models adopt straight twin-needle and two horizontal hooks with auto lubrication for thread looping, sliding lever for thread take up to form two lines of lockstitch seam. The upper shaft and lower shaft is connected by ball bearing and driven by teeth-type synchronic belt; plunge oil pump lubrication system. They adopt the compound feed mechanics of feed dog, needle bar and presser foot, even if for long stitch length and long material, They can deal with them freely. They are widely used in factories of suitcase, tent, cushion, leather goods, apparel, mat, etc.. The difference between the two models: MSK-8420B adopts twin-needle, two large horizontal hooks with auto lubrication. With the parts it can form ten different needle gauges. MSK-8400B adopts single needle and form single line double lockstitch form. 2. Main Technical Specification 1 Application: medium and heavy duty materials 2 Max. sewing speed: 2000 spm 3 Max. Stitch length : 9 mm 4 Needle bar stroke: 36 mm 5 Presser foot lift height: 8mm(by hand); 16mm(by knee) 6 Hook: large horizontal hook with auto lubrication 7 Needle: DP 17 Nm125~180 8 Lubrication: pump auto lubrication (partial of manually oiling) 9 Needle gauge: (Twin-needle) 6.4, 3.2, 4, 4.8, 8, 9.5, 12.7, 16, 19, 25.4 10 Motor power: 0.37 kw (clutch motor) 3. Installation and preparation 3.1 Installation 3.1.1 Location of the machine To ensure a smooth running, the machine should be located on rigid and flat floor. The insert of rubber mat between machine stand and floor is recommended for further reducing the running noise and vibration. 3.1.2 Oil Reservoir Installation(Fig.1) Put the oil reservoir into the table cutout, and place the four cushions on the four corners of the cutout, and place oil felt into the oil reservoir. 3.1.3 Mounting machine head(Fig.2) Make the hinge A of machine head engaged ()with hinge socket B on the table, then turn the machine head freely till it is seated on the frame of table cutout. 1 2 small big B A B A oil feltB A -1 3.1.4 Knee control presser foot lifter installation(Fig.3) a. Installing Install Connector A() , Bell Crank B , () Bell in the order shown in Fig.3. C b. Adjustment (Fig.4) In the order of the following: 1.When the presser foot is at its lowest position, keep the crank in the position shown by b in the figure, turn Knee Control Stop Adjusting Screw C() to touch with the oil reservoir, and tighten the nut of Screw C (). 2. When operate by knee, the presser foot lift volume is controlled by Screw B . () Turn the presser foot lever down, make the bell in the position shown by a in the figure, lift the presser foot to 13 mm, adjust Screw B() to touch the oil reservoir. Then tighten the nut of Screw B . () 3.1.5 Installing the motor (Fig.5) Align machine balance wheel belt groove A with () belt groove B by moving the motor C () ( )motor pulleyleftward or rightward. Be sure the belt is not touch with table. A A C C B B 3 4 5 A C B -2 3.1.6 Connecting the clutch lever to the pedal (Fig.6) 1)The optimum tilt angle of pedal A with () floor is approx.30 degree. 2)Adjust the clutch of the motor so that clutch and draw bar B run in line. lever C () 3)The machine balance wheel should rotate counterclockwise for normal sewing when view from opposite side of balance wheel G . The() motor is rotat...