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SunStar KM-341BL, User Manual

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SunStar KM-341BL User Manual Download Page 13

13

B. Lubricant Supply to Oil Fan  

a) Fill lubricant up to “High”.  

b) Use the oil for Sunstar industrial sewing machine or Shell’s Tellus C10 as lubricant.  

c) When lubricant reaches “Low”, lubricant should be resupplied until it reaches “High”.  

d) Exchange lubricant oil every two weeks.  

[ Fig. 12 ]

Oil pump

Magnet

[ Fig. 13 ]

4-12. Inserting Bobbin into Bobbin Case  

1) Insert the bobbin into the bobbin case as in the figure below.  

※

If the bobbin is inserted in the opposite direction, it is spined loosely, causing entanglement of lower thread.  

2) Insert the thread into the lower thread tension adjusting spring

④

through the thread path

③

and take out the thread

through the thread hole

⑥

.

3) Set the output tension to the extent that when the bobbin case

①

is dropped with the end of the thread held, it falls

gradually.  

4) When the tension adjusting screw

⑤

is turned clockwise, the lower thread tension gets stronger. When it is turned counter-

clockwise, the lower thread tension gets weaker.  

[ Fig. 14 ]

Weaker

Stronger

⑤

⑥

④

③

②

①

Summary of Contents for KM-341BL

Page 1: ...R 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 User s Manual KM 341BL High speed 1 Needle Lock Stitch Upper Lower Feed Sewing Machine M MM ME E 0 05 50 06 62 29 9 ...

Page 2: ... functions high 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...

Page 3: ...1 4 8 Installation of Belt Cover 11 4 9 Thread Stand 12 4 10 Knee Lifting Pad 12 4 11 Oil Supply 12 4 12 Inserting Bobbin into Bobbin Case 13 4 13 Test Operation Pedal Operation 14 5 Basic Sewing Machine Adjustments 15 5 1 Needle Insertion 15 5 2 Adjusting Needle and Hook Timing 15 5 3 Adjusting Oil Supply to Hook 16 5 4 Adjusting Lower Thread Spinning 16 5 5 Adjusting Thread Tension 17 5 6 Adjust...

Page 4: ... box ⓑ Dust and moisture stains and rusts the machine Install air conditioners and clean the machine regularly ⓒ Keep the machine away from direct sunlight ⓓ Leave the left right and rear sides of the machine at least 50cm away from the wall to secure sufficient space for repair ⓔ Explosion Do not use the machine in the atmospheres exposed to the danger of explosion To avoid explosion do not opera...

Page 5: ...trol box Make sure that the power switch is OFF ⓖ Stop the machine when placing a thread or when checking swing materials ⓗ Do not turn on the machine when stepping on the pedal ⓘ If possible install the machine away from the place where powerful electromagnetic waves are generated such as high frequency welding machine 1 4 Operation Warning Caution Warning Make sure that the motor cover is closed...

Page 6: ... 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 꺼 주십시오 CAUTION 경 고 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 마십시오 실 보빈 바늘교환시나 청소전에는 ...

Page 7: ... 2 2 Entire Configuration Arm Bed Oil Fan Face Plate Top Cover Oil Window Presser Foot Knee Lifting Pad Power Switch Reverse Lever Stitch Dial Pulley Thread Stand Safety Devices Take up Cover Belt Cover ...

Page 8: ...Presser Foot Lifting Hand Knee Max Fabric Thickness Max Thickness of Fabric End Feed Dog Height Application DP 17 23 DB 1 21 20 24 34 7 mm 71 5 mm 2 5 mm 8 mm 14 mm 8 mm 5 mm 1 1 2 mm Medium Heavy Materials High speed 1 Needle Lock Stitch Upper Lower Feed Sewing Machine with Vertical Large Hook MODEL KM 341BL ...

Page 9: ... 1 Where to Install 1 Do not install the sewing machine next to television radio and wireless phones since they can cause noises to the sewing machine 2 Connect the power plug of the sewing machine directly to the AC outlet If a multi tap is used it may cause malfunction of the sewing machine 4 2 Machine Transportation 1 The body of the sewing machine shall be transported by two persons as in the ...

Page 10: ...ox See Fig 6 when installing the power switch box and install it on the right bottom of the table Fig 6 4 5 Installation of Head Part Insert the hinge rubber into the table and insert the oil fan into the middle of the head supporting rubber B as in Fig 5 Insert the head hinge into the bed hole and install the machine above the head supporting rubber A and the head supporting rubber B while insert...

Page 11: ...e groove of the belt cover A and fix the rear part using the screw 2 Attach the belt cover B to the table Make sure that the belt cover B does not interfere with the belt operation 4 7 Adjusting Belt Tension 1 When looking at the sewing machine from the pulley side it looks like it is spinning in the left side 2 To adjust the belt tension press the belt with a finger and when it is pushed down abo...

Page 12: ...d running water When lubricant touches eyes rinse off lubricant in running water and go to hospital to see a doctor Do not swallow lubricant It may cause diarrhea and vomiting If you swallow lubricant immediately see a doctor Keep lubricant out of reach of children and youth Keep lubricant stored away from fire 4 11 Oil Supply When it is first time to operate the sewing machine or it is reuse of t...

Page 13: ...in the figure below If the bobbin is inserted in the opposite direction it is spined loosely causing entanglement of lower thread 2 Insert the thread into the lower thread tension adjusting spring through the thread path and take out the thread through the thread hole 3 Set the output tension to the extent that when the bobbin case is dropped with the end of the thread held it falls gradually 4 Wh...

Page 14: ...Fig 15 1 Move the pedal at the B position to see if you can conduct low speed sewing 2 Move the pedal at the C position to see if you can conduct high speed sewing 3 Step the pedal B or C position Stay your feet away from the pedal and place it at the Neutral A position Check whether the needle stops below the surface of the needle plate in case of setting up the lower stop position ...

Page 15: ...nt at 0 5 1 5mm when the hook point is aligned with the middle of the needle Move the needle bar up or down to adjust the needle bar and fasten the screw Fig 18 5 2 Adjusting Needle and Hook Timing 1 Needle Bar Lifting Turn the pulley to place the needle 2 24mm above the lowest point In this case the hook point and the middle of the needle should be aligned Loosen the fixing screw and set the hook...

Page 16: ...thread spinning shaft 2 Press the thread spinning lever 3 Spin five or six times by hand in the direction of thread spinning in the bobbin and operate the sewing machine 4 If the thread spinning does not take place horizontally loosen the thread guide screw and move the thread guide plate left or right for adjustment 5 When the thread is spun around the bobbin a lot loosen the adjusting screw When...

Page 17: ...of the thread take up spring is 7 10mm The standard strength of the thread take up spring twist is 40 60g 2 When adjusting the scope of operation of the thread take up spring loosen the fixing screw for the thread take up and turn the thread adjusting device Adjust the scope of operation to be smaller for heavy materials and vice versa for light materials 3 Adjust strength of the thread take up sp...

Page 18: ...screw left or right to make the sewing fabric held by the pressor foot Fasten the fixing nut Fig 24 5 9 Adjusting Stitch Length 1 Match the desired number on the stitch length dial with the pin above The bigger the figure becomes the bigger the stitch length becomes 2 Press the reverse lever by hand for reserve sewing This time the sewing fabric is fed in the opposite way When the reverse lever is...

Page 19: ...ry Presser Feet The main presser foot and the auxiliary presser foot move up and down alternatively When the main presser foot and the auxiliary presser foot are at the highest position respectively their heights should be same or the height of the auxiliary presser foot should be a bit lower Place the thread take up at the lowest position and pull down the presser bar lift Loosen the screw and ad...

Page 20: ...2 5mm 3 Adjusting Front Rear Location of Main Presser Foot Set the stitch length at the maximum figure and loose the screw to the extent that the rear side of the auxiliary presser foot is not contacted with the main presser foot Move the horizontal movement adjusting crank for the presser foot left or right for adjustment Fig 29 Gap 4 Adjusting Feed of Main Presser Foot The standard ratio of the ...

Page 21: ...tension is too strong The lower thread tension is too strong The movement range is too wide The upper and lower thread tension is improper The tread take up spring tension is improper The gap between opener and hook is improper The needle position is wrong A needle is crooked The end of the needle is broken How to place thread is wrong The timing of thread and hook is improper Because the needle s...

Page 22: ...22 7 7 Table Drawing ...

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