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S S u u n n S S t t a a r r C C O O . . , , L L T T D D . .
R
USER ' ' S MANUAL
KM-1957-7
Post Bed, Wheel Feed with
Driven Roller Foot, 1-Needle
Needle Feed Lock Stitch
Machine with Automatic
Thread Trimmer
KM-1967-7
Post Bed, Wheel Feed with
Driven Roller Foot, 2-Needle
Straight Lock Stitch Machine
with Automatic Thread
Trimmer
1) FOR AT MOST USE WITH EASINESS,
PLEASE CERTAINLY READ THIS MANUAL
BEFORE STARTING USE.
2) KEEP THIS MANUAL IN SAFE PLACE
FOR REFERENCE WHEN THE MACHINE
BREAKS DOWN.
M M M M E E - - 1 1 1 1 0 0 4 4 1 1 2 2
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Summary of Contents for SunStar KM-1957-7
- Page 1 USER ’ ’ S MANUAL KM-1957-7 Post Bed, Wheel Feed with Driven Roller Foot, 1-Needle Needle Feed Lock Stitch Machine with Automatic Thread Trimmer KM-1967-7 Post Bed, Wheel Feed with Driven Roller Foot, 2-Needle Straight Lock Stitch Machine with Automatic Thread...
- Page 3 1. Thank you for purchasing our product. Based on the rich expertise and experience accumulated in industrial sewing machine production, SUNSTAR will manufacture industrial sewing machines, which deliver more diverse functions, high performance, powerful operation, enhanced durability, and more sophisticated design to meet a number of user’s needs.
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Page 4: Table Of Contents
CONTENTS … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … 6 1. - Page 5 7. Inspecting and checking … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … 29 7-1.
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Page 6: Machine Safety Regulations
Machine safety regulations Safety instructions on this manual are defined as Danger, Warning and Notice. If you do not follow the instructoins, physical injuries and machine damages might be occurred. : This indication should be observed definitely. If not, there will be a danger during the installation, Danger conveyance and maintenance of the machine. -
Page 7: Operating Machine
1-4) Operating KM-1957 Series is made to sew patterns on fabrics and other similar materials for industrial machine use. Follow the following indications when operating the machine. ⓐ Read through this manual carefully and completely before operating the machine. ⓑ Wear proper clothes for work. ⓒ... -
Page 8: Caution Mark Position
1-6) Caution mark Caution mark is attached on the machine for safety. position When you operate the machine, follow the directions on the mark. CAUTION 주 의 Do not operate without finger guard and safety devices. Before threading, changing bobbin and needle, cleaning etc. switch off main switch. -
Page 9: Names Of Main Parts
Names of main parts ⑪ ① ⑭ ⑮ ⑫ ⑬ ② ④ ⒃ ③ ⑩ ⑤ ⑥ ⑧ ⑦ ⑨ ① Bobbin winder ⑧ Power switch ② Roller Back Tack Cylinder ⑨ Knee Lifting Pad ③ Roller Lifting Lever ⑩ Program unit ④... -
Page 10: Specifications
Specifications K K M M - - 1 1 9 9 7 7 - - 7 7 Application Automatic Thread Trimmer 1-Needle 2-Needle Model KM-1957-7 KM-1967-7 Spec. 3,500Spm 3,000Spm Max. Sewing speed Thin materials & Medium materials Application Max. Plate width 4.2mm... -
Page 11: Installation
Installation ·Only trained technicians should install and wire up the machine. ·The machine weighs over 55kg. 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 the pedal with the plug in, the machine will start automatically and can cause physical injuries. - Page 12 [ Figure 4 ] 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.
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Page 13: Installation Of Sewing Machine Body
4-5. Installing body of sewing machine ① ② 1. Hinge Rubber 1) As in the figure, assemble two-hinge rubbers ① on the ② table. 2) As in the figure, fix the hinge rubbers with nails ②. ① ② 3) Insert a bed support rubber③... - Page 14 4. Control box 1) As in the Figure, attach control box ① to the lower part of table with four bolts ②. ② ① [ Figure 9 ] 5. Pedal switch and connecting rod 1) Attach pedal switch ① to pedal switch bracket ② with four bolts ③.
- Page 15 7. Spool stand assembly 1) Fix a spool stand assembly① to the table as shown in figure. - KM-1957-7 : Duel thread stand assembly - KM-1967-7 : Three thread stand assembly ① [ Figure 12 ] 8. Installation of pneumatic components and function check 1) Fix the pneumatic bracket①...
- Page 16 10. Installing of thread release sensor 1) Fix a limit switch bracket② to a bed support① with a ① fixation screw③. 2) Adjust the location of the limit switch bracket② and the ② sensor presser plate⑤ by loosening the fixation screw③ ⑧...
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Page 17: Supplying Oil
4-6. Supplying oil ·Plug in only after oil supply is finished. If the operator mistakenly steps on the pedal with the plug in, the machine will start automatically and can cause severe injuries. ·When handling lubricants, wear protective glasses or gloves to prevent lubricants from contacting with your eyes or skin. -
Page 18: Trial Run (Pedal Operation)
4-7. Trial run (Pedal operation) ·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. Notice 1. Press pedal lightly to the position of B to check if the machine is operating low-speed sewing. -
Page 19: Back Tack Button (Thread Trimming Type)
4-9. Reverse Button Function Check The machine changes immediately to backward stitching when pressing a reverse button① during forward stitching. If you press a pedal and operate the sewing machine under the state of holding the machine and pressing the reverse button ①... -
Page 20: Adjusting Parameter Of Sub Thread Adjusting Device
4-11. Adjusting Parameter of Sub Thread Adjusting Device - The default value of A-95 is “0”. Parameter No. Set Value Function Name A-95 Use the main thread adjusting device①. In order to run the sub thread adjusting device② while using the main device, press the sub thread tension switch. Then with the lamp turned on, the dish for the sub thread adjusting device②... - Page 21 4. Operating Main·Sub Thread Adjusting Devices 1) Basic Specifications - To get the best stitch quality, increase the upper thread tension in thick stepped pulley process while stitching. - Turn off the duel tension button and adjust the tension of main thread control device in A part condition of main material. - Turn on the duel tension button and adjust the tension of sub-thread control device in the B part condition of thick material with stepped pulley.
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Page 22: Preparations For Sewing
Preparations for sewing 5-1. Installing needle ·Always turn off the power when mounting a needle. If the pedal is accidentally stepped, the machine might unexpectedly operate, causing injury. Notice With the groove part① of needle inside as shown in figure 24, adhere the upper end part of needle closely to the upper side of stopper hole②... -
Page 23: Winding Lower Thread
2. Threading the Lower Thread 1) Insert the bobbin① into the bobbin case②. 2) Make the thread go through “A” part of bobbin case and pull out the thread from the end of lower thread tension adjusting plate③. 3) Make the thread pulled out go through “B” par of bobbin case②... -
Page 24: Inserting Upper Thread
5-5. Inserting upper thread ·Always turn off the power when inserting upper thread. If the pedal is accidentally stepped, the machine might unexpectedly operate, causing injury. Notice 1) Place the thread take-up ① at its the highest position by turning pulley before inserting the upper thread. 2) The adequate length of upper thread extending from the needle hole is 50mm. -
Page 25: Sewing
Sewing ·Wear protective gears for safety. Operation without them may lead to physical injuries. ·Turn off the machine in the following situations. If the operator mistakenly steps on the pedal with the plug in, the machine will start automatically and can cause severe injuries. - Page 26 2. Upper Thread Tension Adjustment 1) Arm thread guide (upper) Arm thread guide (upper)① tension should be set lower ① than the tension of the main thread tension control device ②. If you turn the nut③ clockwise, the tension would ③...
- Page 27 4) Thread Take-up Spring Tension Adjustment (1) Operating range of thread take-up spring As shown in figure 36, if you loosen the screw① and turn the thread take-up spring stopper② clockwise, the operating range of thread take-up spring would decrease. If you turn the thread take-up spring stopper② counterclockwise, the operating range of thread take-up spring would increase.
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Page 28: Adjusting Upper Thread Length After Trimming
Note) The adjustment of the thread tension control device “KM-1976-7” is identical to the “KM-1957-7”. [ Figure 39 ] 6-4. Adjusting the Stitch Length 1) As shown in figure 40, press a stitch length control button ①... -
Page 29: Inspecting And Checking
Inspecting and checking ·To maintain proper performance of machine and use it for a long time, clean 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. Notice ·Turn off the power switch before operation. -
Page 30: Maintenance And Repair
Maintenance and repair ·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 sure to return them to original positions. ·Use both hands when bending the machine backwards or returning it to the original position. Using only one hand can lead to severe hand injuries due to the weight of the machine. - Page 31 3. Rotating roller shaft 1) Raise the presser bar lifter. 2) Hold the roller presser foot bracket guide ① as in Figure 45 and move it down and left. Then, there will be some space to exchange the guage. 3) To restart, hold the roller presser foot bracket guide ① and turn it to the right direction.
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Page 32: Adjusting The Feed Cam
8-2. Adjusting feed cam 1. The adjustment of the feed cam body ① will determine the timing of the feed dog and the needle. Lay the machine back and move the needle to its highest position. The standard position will be made when the baseline ② of the feed cam body ①... -
Page 33: Adjusting The Motion Direction Of Feed Dog
8-4. Adjusting the motion direction of feed dog 1. KM-1957-7 1) Remove the four different gear covers. 2) When the wheel feed driving gear A① operates normally and the wheel feed driving gear A② operate back tack stitching, they are engaged with the wheel feed driving gear B③. -
Page 34: Adjusting The Needle And Hook Timing
8-5. Adjusting timing of needle and hook 1. Adjusting the height of the needle and the timing of hook Turn the pulley manually so that the needle will be 1.8mm from the lowest position. Then adjust so that the edge of the hook will be directly in the center of the needle. -
Page 35: Adjusting The Space Between Upper Face Of Hook Stopper And Upper Face Of Needle Plate Groove
8-6. Adjusting clearance between upper side of hook stopper and needle plate groove As in Figure 53, the clearance between the upper side of hook stopper and needle plate groove is set to 1~1.2mm by default. This clearance could impact the stitch tension and thread separation when trimming, so it needs to be checked. If there is a problem with the clearance, move the hook tray bushing ①... -
Page 36: How To Adjust The Thread Trimmer Device
8-8. Adjusting for thread trimmer 1. Adjusting the trimmer driving part 1) Fixing the position of trimming cam a) Turn the pulley using a hand to place the needle bar ① at its lowest position. b) With the left side of the trimming cam ② softly attached to the right side of the lower shaft medium bushing ③, turn the cam to align the base point ④... - Page 37 2. Adjustment of linking device for movable knife shaft and the trimmer driving part [ Figure 57 ] 1) When the previously explained adjustment of trimmer driving part is complete, it is in its normal position where the trimmer shake linkage ① has returned to its up position after trimming action. 2) First, loosen the fixing screw ②...
- Page 38 2) Adjusting movable knife and fixed knife a) As shown in Figure 59, move the movable knife ① and restore the position slowly. When doing so, fix the position of the fixed knife ③ so that edge ④ of the fixed knife ③ touches the 3mm before the fixed knife trimming point ②. b) After aligning the fixed knife ③...
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Page 39: How To Adjust The Gear Box (Km-1967-7)
4) Adjusting lower thread holder ※ When the movable knife ① has finished trimming and returned to its original position (arrow Ⓐ), loosen the fixing screw ③ so that the clearance between the movable knife edge and the edge of the lower thread holder ② is about 8mm and the equal point of the lower thread edge is about 0.5mm inside (arrow Ⓑ). -
Page 40: How To Exchange The Stitch Length Gauge Set
8-10. Exchanging needle width gauge set 1. Disassembling order [Caution] Turn off the power switch. 1. Open the hook cover. 2. Raise the presser bar lifter and turn the roller left. 3. Remove the needle. 4. Disassemble the needle holder. 5. -
Page 41: Pneumatic Wiring
Pneumatic wiring 1. KM-1957-7 Pneumatic wiring ⑧ ⑧ ⑥ ⑨ ⑩ ⑤ ⑦ ⑨ ⑪ ① ② ⑪ ⑩ Thread open sensor → ③ Assembled to the bed support ④ ⑤ ⑥ ④ ⑦ 2. KM-1967-7 Pneumatic wiring ⑧ ⑥... -
Page 42: Causes Of Troubles And Troubleshooting
1 1 0 0 Causes of troubles and troubleshooting 1) Sewing machine troubleshooting Symptom Checkpoints Root cause Corrective action Needle is inserted into wrong direction. Direction and height of needle Reinsert the needle correctly. Needle is bent. Needle Replace the needle. Bad timing of feed dog. - Page 43 Symptom Checkpoints Root cause Corrective action Too tight upper thread tension. Reduce tension of upper thread. Upper thread does not sink. Too loose lower thread tension. Increase tension of lower thread. Too weak upper thread tension. Increase upper thread tension. Lower thread does not sink.
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