background image

-  21  -

조정  개소의  보기

현        상

원        인

점        검

처리

대책

페이지

윗실이  죄이지 

않는다

윗실  장력이  너무  약하다

윗실  장력을  강하게 
한다

6

밑실  장력이  너무  강하다

밑실  장력을  강하게 

한다

6

밑실이  죄이지 

않는다

윗실  장력이  너무  약하다

윗실  장력을  약하게 

한다

6

밑실  장력이  너무  강하다

밑실  장력을  강하게 

한다

6

타오루눈  등의 

죄임  불량

실  지나는  길의  마무리가

나쁘다

각  실  지나는  길의

확인

퍼프(puff)  등으로

닦는다

보빈의  미끄럼  불량

밑실을  잡아당겨,

실의  장력을확인한다

보빈을  교환  한다

가마를  교환  한다

가마와  가마고정의  간격이 

작다

가마고정의  간격을 

확인한다

[바늘과  가마의

  타이밍  조정]을  한다

15

윗밑실  모두 

잘리지  않는다

이동  칼과  고정  칼이

맞물려  있지  않다

이동  칼과  고정  칼을 

맞물리게  한다

19

이동  칼

고정  칼의  날 

부분의  상처마모

이동  칼

․ 

고정  칼의 

날  부분

이동  칼과  고정  칼의

교환

23

이동  칼이  움직이지 

않는다

사절신호가  나오는가

전기회로의  점검

사절솔레노이드  교환

윗실이  잘리지 

않는다

밑실이  잘리지 

않는다

바늘의  설치방법이  나쁘다

바늘의  방향

바늘을  올바르게
설치  한다

4

최종  땀에서  봉비되고, 

이동  칼이  윗실을  잡지 
못한다

침하정지위치를 

확인한다

침하정지위치의  조정

22

이동  칼과  고정  칼이  맞물

려  있지  않다

이동  칼과  고정  칼을 

맞물리게  한다

19

이동  칼과  고정  칼의

잘림이  나쁘다

이동  칼

고정  칼의 

날  부분

이동  칼과  고정  칼의

교환

23

이동  칼과  고정  칼이  맞물

려  있지  않다

이동  칼과  고정  칼을 

맞물리게  한다

19

Содержание LS2-H520

Страница 1: ...LS2 H520 LS2 H5200 SINGLE NEEDLE NEEDLE FEED LOCK STITCH SEWING MACHINE WITH THREAD TRIMMER 1 OPERATION MANUAL PART BOOK...

Страница 2: ......

Страница 3: ...symbol at left means beware of injury This symbol indicates something that you must not do This symbol indicates something that you must do The picture inside the circle indicates the nature of the t...

Страница 4: ...5 off A S 33 2 40 25 OFF A S A S...

Страница 5: ...belt covers to the machine head and motor Be sure to wear protective goggles and gloves when handling the lubricating oil and grease so that they do not get into your eyes or onto your skin otherwise...

Страница 6: ...placing the bobbin and needle when not using the machine and when leaving the machine unattended For machines with automatic presser lifter do not touch the solenoid section because if becomes hot dur...

Страница 7: ...rician to carry out any maintenance and inspection of the electrical system Turn off the power switch and disconnect the power cord from the wall outlet at the following times otherwise the machine ma...

Страница 8: ...act your nearest UNICORN dealer The positions of the labels may vary slightly depending on the model of sewing machine or motor 1 2 Be sure to connect the ground If the ground connection is not secure...

Страница 9: ...ing machine is first turned on verify the rotational direction of the pulley with the power on The pulley should rotate counterclockwise when viewed from the pulley Power must be turned off when the m...

Страница 10: ...L DESCRIPTION 7 1 Upper shaft and needle bar mechanism 7 2 Thread wiper 7 ADJUSTMENT 8 16 1 Adjusting the needle bar height 8 2 Adjusting the rotary hook position 8 3 Adjusting the rotary hook holder...

Страница 11: ...1 How to install the belt V V 13mm 16mm Tilt back the machine head and place the belt onto the motor pulley and machine pulley Press belt with a finger force of 5 N and adjust the nut so that there is...

Страница 12: ...he oil cover Screw Wipe off any contamination from the magnet and the oil pan Use the oil specified by Spindle15 2 Adjusting lubrication for upper shaft and rotary hook 1 1 Upper shaft lubrication Rem...

Страница 13: ...he machine with the needle tip below the needle plate when the needle position switch is set to the needle down position Back treadle the pedal to position and release it to neutral to trim the thread...

Страница 14: ...4 OPERATION 3 Threading the needle...

Страница 15: ...bin case tension spring 3 Pull the thread from the bobbin case tension spring 5 Winding the bobbin thread 1 2 3 4 1 Fit the bobbin in the bobbin winder shaft 2 Depress the joint as far as it will go 3...

Страница 16: ...tension at this time is 25 30g To adjust the operation range of the thread take up spring loosen the set screw and turn the thread tension bracket assembly To adjust the tension of the thread take up...

Страница 17: ...turned on the thread trimming solenoid activates pressing the thread trimming cam lever stud The roller shaft of the thread trimming cam lever assembly secured by the thread trimming cam lever stud i...

Страница 18: ...rejector needle bar bush Then firmly tighten the screw A 0 0 5mm 0 0 05mm Align the bottom reference line of the needle bar with surface A of the needle bar oil rejector needle bar bush by turning the...

Страница 19: ...heck that the needle tip is as indicated below For thin materials The needle tip is aligned with tips of the feed dog and the upper surface of the needle plate For thick materials There is a 5mm gap b...

Страница 20: ...parallel loosen the screw of the needle feed arm then move the needle bar bracket forward or backward 2 Feed dog position Set the feed regulating dial to maximum and turn the machine pulley Check that...

Страница 21: ...m 3 0 6 0 8mm 4 0 5mm 40Kg 1 Loosen the screw and turn the machine pulley until the needle bar is raised 5 mm above its lowest position then depress the thread trimming solenoid 2 With the thread trim...

Страница 22: ...the indentation of the thread trimming clutch 3 With the thread trimming solenoid depressed turn the machine pulley Adjust the movable knife and the fixed knife so that they overlap when the rotation...

Страница 23: ...ve the feed bracket up or down 1 2 2 90 1 When the feed dog is fully raised its angle is properly adjusted if the circle on the feed bracket shaft aligns with the index on the feed rock shaft arm 2 To...

Страница 24: ...ard and backward at the inching speed 215 spm 3 Adjust as follows when the forward and backward stitch lengths are different 1 Remove the rear plate 2 Loosen the screw 3 When the forward stitch length...

Страница 25: ...osition there should be a 9 5 11 5 mm gap between the upper surface of the needle plate and the needle tip with thin or medium materials or a 10 12 mm gap with thick materials If adjustment of needle...

Страница 26: ...Raise the presser foot using the presser bar lifter 2 Remove the screw and the needle plate 3 Remove the screws and the feed dog 4 Remove the screws and the auxiliary needle plate 5 Turn the machine p...

Страница 27: ...17 4 4 16 15 15 15 4 4 4 6 6 6 2...

Страница 28: ...y hook timing 15 Thread wiper too high Thread wiper position Adjust thread wiper position with screw Thread breakage Improper threading Threading Rethread 4 Bent needle Blunt needle tip jammed eye Nee...

Страница 29: ...19 4 4 1 4 4 15 15 15 6 6...

Страница 30: ...esser foot contact Presser bar pressure Tighten presser foot adjustment screw Presser bar height Adjust presser bar height Improper needle to rotary hook timing Needle bar rise Adjust needle to rotary...

Страница 31: ...21 6 6 6 6 puff 15 19 23 4 22 19 23 19...

Страница 32: ...ok stop gap too small Gap Adjust needle to rotary hook timing 15 Improper thread cutting a Needle bobbin threads not cut b Needle thread not cut c Bobbin thread not cut Movable knife fixed knife do no...

Страница 33: ...23 6 1 22 6 24 24 24 24...

Страница 34: ...ead cutter signal not transmitted Check circuits refer to motor adjustment manual Thread wiper does not function Needle thread remainder too long Adjust pretension 6 Timing too early wipes thread befo...

Страница 35: ...25...

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