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Cleaning

                   

      ★  Turn  off   the  power  switch  before 

            starting  any  cleaning  work  otherwise

                              the  machine  may  operate  if  the 

                              treadle  is  depressed  by  mista ke,  which 

                              could  result  in  injury.

                        ※  W hen  using  a  clutch  motor,  the  motor

                              will   keep  turning  eve  a fter  the  power  is

                              switched  off  as  a  result  of  the  motor's

                              inertia.  Wait  until   the  motor  stops  ful ly

                              before  starting  work

 

   

★  Be  sure  to  we ar  protecti ve  goggles

          and  gloves  when  handling  the

                            lubri cating  oil  nd  grease,  so  that  they

                            do  not  get  into  your  eyes  or  onto 

                            your  skin,  otherwise  inf lammation  can

                            result.

                            Furthermore,  do  not  drink  the  oil  or

                            eat  th e  grease  under  any 

                            circumstances,  as  they  can  cause

                            vomiting  and  diarrhoea.

                            Keep  the  oil  out  of   the  reach  of

                            children.   

Maintenance  and  inspection

                   

    ★  Maintenance  and  inspection  of  the

          sewing  machine  should  only  be  carried   

                            out  by  a  qualified  technician.

    ★  Ask  your  Unicorn  dealer  or  a   qualified

          electrician  to  carry  out  a ny  maintenance 

                            and  inspection  of  the  electrica l  system.

      ★  Turn  off  the  power  switch  and

            disconnect  the  power  cord  from  the

                            wall  outlet  at  the  following  times,

                            otherwise  the  machine  may  operate  if

                            the  treadle  is  depressed  by  mistake,

                            which  could  result  in  injury.

                           

When  carrying  out  inspection, 

                            adjustment  and  maintena nce.

                           

When  replacing  consumable  parts  such

                            as  the  rotary  hook  and  knife.

                   ※  When  using  a  clutch  motor,  the  motor

                            will  keep  turning  even  after  the  power   

                            is  switched  off  as  a  result  of  the         

                            motor's  inertia. 

                            Wait  until  the  motor  stops  fully  before 

                            starting  work.

   

★  If  the  power  switch  needs  to  be  l eft 

          on  when  carrying  out  some                     

                              adjustment,  be  extremely  careful  to       

                              observe  a ll  safety  precautions.

      ★  Use  only  the  proper  replacement 

            parts  as  specified  by  Unicorn.

       

      ★  If  any  safety  devices  have  been

       

            removed,  be  a bsolutely  sure  to             

                                re-install  them  to  their  original             

                                positions  and  check  that  they             

                                operate  correctly  before  using  the   

                                machine. 

        ★  Any  problems  in  operation  which

              result  from  unauthorized             

                                modifications  to  the  machine  will 

                                not  be    covered  by  the  warranty.

Summary of Contents for LS2-H530

Page 1: ...PART BOOK LS2 H530 LS2 H5300 SINGLE NEEDLE SIDE CUTTER LOCK STITCH SEWING MACHINE WITH THREAD TRIMMER 1 OPERATION MANUAL...

Page 2: ......

Page 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...

Page 4: ...5 off A S 34 2 40 25 OFF A S A S...

Page 5: ...all the 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 ot...

Page 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...

Page 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...

Page 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...

Page 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...

Page 10: ...6 8 Adjusting the stitch length 6 MECHANICAL DESCRIPTION 7 1 Thread trimmer 7 2 Thread wiper 7 ADJUSTMENT 8 15 1 Adjusting the needle bar height 8 2 Adjusting the rotary hook position 8 3 Adjusting th...

Page 11: ...4 8mm 3 16 6 4mm 1 4 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 th...

Page 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...

Page 13: ...needle raised above the needle plate 2 Upper knife operation To operate the upper knife lower the upper knife set lever The upper knife will now operate in sync with the operation of the machine To s...

Page 14: ...RATION 3 Attaching the needle DB 1 Insert the needle completely making sure that the lengthwise groove of the needle is on the left and secure it using the set screw Use a DBx1 needle 4 Threading the...

Page 15: ...bin case tension spring 3 Pull the thread from the bobbin case tension spring 6 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...

Page 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...

Page 17: ...he 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 id pushed abo...

Page 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...

Page 19: ...een the rotary hook and the rotary hook holder is approx 0 7 0 9mm Set the feed regulating dial to maximum and turn the machine pulley Check that the needle enters the center of the feed dog hole at t...

Page 20: ...epressed fit the indentation of the thread trimming clutch over the roller shaft 3 When the space between the side faces of the thread trimming clutch and the roller shaft is 0 6 0 8mm tighten the scr...

Page 21: ...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...

Page 22: ...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...

Page 23: ...sition 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 s...

Page 24: ...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...

Page 25: ...per feed scale to 0 2 The back edge pf the upper knife should be aligned with the needle center The upper knife can be adjusted by loosening the screw and moving the knife within a range of 2 mm forwa...

Page 26: ...16 4 4 8 8 8 8 4 4 4 6 6 6 2...

Page 27: ...hook timing 8 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 Needl...

Page 28: ...18 4 4 1 4 4 8 8 8 6 6...

Page 29: ...resser 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 rotar...

Page 30: ...20 6 6 6 6 puff 8 11 14 4 13 11 14 11...

Page 31: ...ok stop gap too small Gap Adjust needle to rotary hook timing 8 Improper thread cutting a Needle bobbin threads not cut b Needle thread not cut c Bobbin thread not cut Movable knife fixed knife do not...

Page 32: ...22 6 1 13 6 11 11 11 11...

Page 33: ...read cutter signal not transmitted Check circuits refe to motor adjustment manual Thread wiper does not function Needle thread remainder too long Adjust pretension 6 Timing too early wipes thread befo...

Page 34: ...24...

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