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8. Maintenance and Adjustment of Sewing

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8.1) Adjusting needle bar

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8.2) Adjusting timing of needle and hook

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8.3) Adjusting lubrication of thread take-up spring part

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8.4) Adjusting lubrication of hook

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8.5) Adjustment of Top Stop Position

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8.6) Adjusting presser foot pressure

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8.7) Adjusting stitch length

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8.8) Adjusting feed dog height and inclination

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8.9) Adjusting auxiliary presser foot and upper feed presser foot

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8.10) Adjusting feeding amount of auxiliary presser foot

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8.11) Adjusting feed cam

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8.12) Adjusting for thread trimmer

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8.13) Adjusting blade pressure

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8.14) Exchanging movable knife

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8.15) Exchanging fixed blade

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8.16) Adjusting thread release

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8.17) Adjusting remaining amount of upper thread

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9. Causes of Troubles and Troubleshooting

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Содержание KM-1640BL-7

Страница 1: ... USE 2 KEEP THIS MANUAL IN SAFE PLACE FOR REFERENCE WHEN THE MACHINE BREAKS DOWN M MM ME E 1 12 20 09 91 11 1 R S Su un nS St ta ar r C CO O L LT TD D USER S MANUAL KM 1640BL 7 Semi direct one needle upper lower feed lock stitch machine with automatic thread trimmer with large hook ...

Страница 2: ......

Страница 3: ...h performance powerful operation enhanced durability and more sophisticated design to meet a number of user s needs 2 Please read this user s manual thoroughly before using the machine Make sure to properly use the machine to enjoy its full performance 3 The specifications of the machine are subject to change aimed to enhance product performance without prior notice 4 This product is designed manu...

Страница 4: ...very 11 4 3 Bending the machine backwards 11 4 4 Table drawing 12 4 5 Installation of Sewing Machine Body 13 4 6 Trial run Pedal operation 17 4 7 Check for machine stop position 17 4 8 Reverse button function for automatic trimming type 18 4 9 Installation of Automatic Knee Lifter Solenoid options and Power Switch Box 18 5 Preparations for sewing 19 5 1 Installing needle 19 5 2 Bobbin Insertion an...

Страница 5: ...7 Adjusting stitch length 27 8 8 Adjusting feed dog height and inclination 28 8 9 Adjusting auxiliary presser foot and upper feed presser foot 28 8 10 Adjusting feeding amount of auxiliary presser foot 29 8 11 Adjusting feed cam 30 8 12 Adjusting for thread trimmer 30 8 13 Adjusting blade pressure 34 8 14 Exchanging movable knife 34 8 15 Exchanging fixed blade 34 8 16 Adjusting thread release 35 8...

Страница 6: ...he package and wrappings from the top Take special notice on the nails on the wooden boxes ⓑ Dust and moisture stains and rusts the machine Install an airconditioner and clean the machine regularly ⓒ Keep the machine out of the sun ⓓ Leave sufficient space of more than 50cm behind and on the right and left side of the machine for repairing ⓔ EXPLOSION HAZARDS Do not operate in explosive atmosphere...

Страница 7: ...the control box ⓖ Stop the machine before threading the needle or checking after work ⓗ Do not step on the pedal when turning the power on ⓘ If possible install the machine away from source of strong electrical noise such as high frequency welding machines 1 4 Operating machine Warning Caution Warning Keep motor cover in place before operating turn off power before inspecting or adjusting 1 5 Safe...

Страница 8: ...se injury Be sure to wait at least 360 seconds before opening this cover after turn off main switch and unplug a power cord 고압 전류에 의해 감전될 수 있으므로 커버를 열 때는 전원을 내리고 전원 플러그를 뽑고 나 서 360초간 기다린 후 여십시오 CAUTION 주 의 Do not operate without finger guard and safety devices Before threading changing bobbin and needle cleaning etc switch off main switch 손가락 보호대와 안전장치 없이 작동하지 마 십시오 실 보빈 바늘교환시나 청소전에는 반드시 주전원의 스위치를...

Страница 9: ... Presser Foot Reverse Button Oil Window Climb Dial Thread Winder Thread Stand Pulley Stitch Length Dial OP Unit and Panel Control Box Oil Fan Lap Switch Safety Devices Thread Take up Lever Cover Finger Guard Motor Cover Fig 2 1 ...

Страница 10: ...ntity along with other performance rates A device that senses the edge or thickness of the sewing material to stop the machine without manual pedaling Available in two types SEDG 1B for edge sensing type and SEDG 2B for thickness sensing type An essential device when one person is operating multiple sewing machines Has different pedals for acceleration thread trimming presser foot and ascending pe...

Страница 11: ...e to press the lower part of the board leg of the machine or the whole body of machine falls backwards leading to physical injuries Fig 4 1 Fig 4 2 Fig 4 3 Only trained technicians should install and wire up the machine The machine weighs over 50 kg More than two persons should install the machine Do not plug in the machine until installation is completed If the operator mistakenly steps down on t...

Страница 12: ...4 4 Table drawing Please use the table provided by Sunstar When using self made table the thick of table should be more than 40mm Please use table strong enough to sustain the weight of the machine Fig 4 4 ...

Страница 13: ...in the middle of head supporting rubber B as shown in the figure 1 install it into the table Insert the machine head hinge into the bed holes By inserting it into the hinge rubber stand the machine on the head support rubber A and the head support rubber B 4 5 2 Installation of Knee Lift Pad A Insert a knee lift pad in a knee support shaft point assembled in the oil pan and adjust the position for...

Страница 14: ...nnecting rod with pedal switch and the other end with pedal and then adjust length of the rod Fig 4 9 4 5 4 Control Box 1 Attach the control box undersurface of the table with 4 bolts as shown in the figure 4 5 6 Adjustment of Belt Tension Remove a hand pulley and a motor cover Loosen the main motor bracket screw and adjust the tension by moving the main motor bracket from side to side Fig 4 8 Fig...

Страница 15: ... assembling the cover A assemble a hand pulley into the upper shaft 3 Cover B is assembled at the back of the arm as shown in the Figure 4 12 Assemble a P U bracket before assembling 4 Fix is to the arm using 4 screws 5 Cover A and B are fixed with the screw as shown in the Figure 4 13 Fig 4 11 Fig 4 12 Fig 4 13 CoverSupportBarA CoverSupportBarB Twopieces ...

Страница 16: ... you mistakenly drink lubricant Keep lubricant away from the reach of children and the youth Caution 4 5 8 Lubrication A Attachment of magnet for sweeping up chips Attach the magnet for sweeping up chips included in the accessory box to the oil pump inside of the bed Refer to Figure 4 14 Do not use the magnet for other usages Running the sewing machine without the magnet could cause mechanic probl...

Страница 17: ...ace of needle plate after trimming Fig 4 17 Make sure not to touch or press down parts that are operating or moving during operation Failure to follow the safety rules may result in physical injuries or mechanical damages Caution 4 7 Check for machine stop position Press a reverse button to move a needle up and down then please check the regular position of the machine Check the carving of the han...

Страница 18: ... is in an up stop position will stop the needle bar in a low position Fig 4 19 up stop position down stop position 4 9 Installation of Automatic Knee Lifter Solenoid options and Power Switch Box 1 Please ensure that the control box should be placed in the middle of the solenoid bracket by referring to the figure 4 20 when you attach the control box 2 Attach the solenoid to the table following the ...

Страница 19: ...he handle Fig 5 2 Move the needle upper end so that it directly touches the upper side of the stopper hole when the groove of the needle is on the left Then use the clamp screw to fix the position of the needle Refer to figure 5 1 5 2 Bobbin Insertion and Removal Fig 5 1 Always turn off the power when mounting a needle If the pedal is accidentally stepped the machine might unexpectedly operate cau...

Страница 20: ... and thread winds on bobbin 6 When thread winding is done bobbin operating plate returns automatically 7 Remove bobbin and cut thread with bobbin winder knife To adjust the amount of bobbin winding loosen screw and adjust bobbin winder adjusting plate Fig 5 3 Make sure not to touch or press down parts that are operating or moving during thread winding Failure to follow the safety rules may result ...

Страница 21: ...n cause severe injuries When inserting upper thread When replacing bobbin or needle When the machine not in use or the operator leaving the work place Caution 6 2 Adjusting thread tension Sewing Type Cause Troubleshooting Good sewing in balance Upper thread tension is too weak Lower thread tension is too strong Upper thread tension is too strong Lower thread tension is too weak Make upper thread t...

Страница 22: ...ngth So please adjust as desired B Adjusting the thread take up tension As in Figure 6 2 insert the driver into the groove of the thread tension control assembly Turn clockwise to make the spring tension stronger and counter clockwise to make it weaker Fig 6 2 6 2 2 The tension of the lower thread becomes larger when you turn clockwise the tension adjustment screw and becomes smaller when you turn...

Страница 23: ...n machine regularly according to the following way Evan when machine is not in use for a long time clean according to the following way before using the sewing machine Caution 7 1 Regular Check Points 1 Cleaning lubrication and grease supply for particular areas should take place on a regular basis to keep the machine at the best conditions 2 Check the tension of each driving belt 3 When the regul...

Страница 24: ... Oil Around of moving blade and fixed blade Please remove dust on the moving and fixed blade under the needle plate with air Daily Once a week Once a month Three times a week 1 2 4 3 Cleaning Frequency 1 Make sure to turn off the power of the machine before cleaning 2 The parts disassembled for cleaning should be assembled in the reverse order of disassembly Caution ...

Страница 25: ...oosened hook so that the clearance between the needle groove inside carved in the lateral side of the needle and the hook edge becomes 0 05 0 1mm Later tight again the three fixing bolts Fig 8 1 Fig 8 2 For machine maintenance and repair consult with qualified technicians For electrical maintenance and repair consult with qualified technicians or agencies When safety devices are disassembled make ...

Страница 26: ...ate where the maximum and minimum amounts do not fall short of or exceed the amount shown in the picture If the amount of lubrication is too small it could invite the hook seizure and if the amount is too large it could cause a contamination by oil B Adjusting the amount of lubrication When you turn clockwise the lubrication adjustment screw inserted in the front bushing of the lower shaft the amo...

Страница 27: ...essure adjustment screw 8 7 Adjusting stitch length As shown in Figure 8 7 the number marked in the stitch control dial means the stitch width in mm Adjust it in sideways and fix it to your desired number of stitch width Fig 8 6 Fig 8 7 After disassembling and adjusting a safety device always place it back to the original position and check whether it functions as intended Use both hands when push...

Страница 28: ... the same pace or sometimes at different paces In these cases please adjust the height as follows In case of running vertically the auxiliary presser foot and the upper feed presser foot at the same height a The vertical running range of the auxiliary presser foot and the upper feed presser foot is from 2 to 5 5 mm b The vertical running amounts of the auxiliary presser foot and the upper feed pre...

Страница 29: ...ser bar lifter Open the rubber cover of the upper cover and loosen the clamp screw A different adjustment of vertical running amount between the auxiliary presser foot and the upper feed presser foot is possible by adjusting the presser foot vertical move crank When the adjustment is finished fix tightly the clamp screw of the vertical move crank and place the rubber cover Fig 8 10 8 10 Adjusting ...

Страница 30: ...ving vertically the feed cam First turn the pulley with hands to fix the needle bar to the highest point The standard position will be when the center of the No 1 fixing bolt of the presser foot vertical move cam is aligned with the center line of the upper shaft the bottom of the No 1 fixing bolt of the feed cam is aligned with the center line of the upper shaft Fig 8 12 8 12 Adjusting for thread...

Страница 31: ...rimmer driving part a The standard assembly position is shown in Figure 8 15 b Fix the thread trimming following crank to the trimming shaft as shown in the figure c Fix the stopper lever to the bed so that the lever can smoothly rotate in a range where the gap of the trimming shaft does not occur D Adjusting the thread trimmer solenoid a Working amount of the thread trimming solenoid The standard...

Страница 32: ... as shown in Figure 8 17 This state is the standard Fig 8 17 E Adjusting the thread trimming cam a Under the thread trimming solenoid is in operation rotate the trimming cam clockwise and fix the cam when it connected with the roller Refer to Figure 8 18 b When the thread cam following crank returned by stopping the operation of the thread trimming solenoid the edge end between the cam and the rol...

Страница 33: ...standard position of the movable knife is 7 5mm from the needle center and 5 mm for the fixed blade b Adjusting the progress amount of the movable knife If you run the machine putting the solenoid in the operation mode the movable knife will rotate by the thread trimming cam The standard will be where the cut part of the movable knife progresses 1 5 to 2mm from the end edge of the fixed blade when...

Страница 34: ...mble it in reverse order of disassembling 8 15 Exchanging fixed blade A When exchanging the fixed blade pick the washer and the inner bobbin stopper out by loosening the screw indicated in the figure 8 25 then disassemble by loosening the fixed blade screw When assembling the exchange assemble it in reverse order of disassembling C How to adjust the tension of the fixed blade loosen the nut for ad...

Страница 35: ... Refer to Figure 8 28 8 16 Adjusting thread release A Adjust such that the dish of upper thread tension controller opens about 1mm when the thread trimming solenoid is in the operation B Adjustment is available by loosening the thread release cable fixing nut and wire Refer to Figure 8 27 Fig 8 26 Fig 8 27 Fig 8 28 If the gap of the control dish is too narrow it invites the shortening of the upper...

Страница 36: ...rong position Too tight upper thread tension Too tight lower thread tension Loose upper thread Upper and lower thread tensions are bad Thread take up spring tension is inadequate The gap between the opener and hook is inadequate Needle is inserted into wrong position Needle is bent Wrong direction The timing between the needle and hook is bad The length of the remaining upper thread is too short A...

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