USER S MANUAL
Contents
1. Remove the needle and the bobbin and lift the presser foot Turn on the power and run the sewing machine for one minute at regular speed Place the oil status checking paper on the hook and check the oil volume sprayed to the paper by running the machine at regular speed for some 8 seconds 2 Adjustment of Lubrication to Hook Lean backwards the sewing machine and adjust the lubrication to the hook using the oil supply adjusting screw Turn the oil supply adjusting screw clockwise and the oil supply will be reduced Turn the oil supply adjusting screw counter clockwise and the oil supply will increase Use the sewing machine for 2 hours and check the oil supply to the hook 2 Lubricant shall not move above the Full mark on the oil window Otherwise lubricant leakage Min Sprayed Max Sprayed Oil 0 5mm Oil 1mm 43 44 7 4 2 Face plate oil level check KM 1751 1791 Series If there is excessive or insufficient amount of oil provided to the face plate from the thread take up lever hinge pin loosen the face plate oil level adjustment screw fixing nut and adjust the face plate oil level adjustment screw After adjustment tighten the fixing nut 7 5 Grease Supply KM 1750SF 7 5 1 Grease Preparation Use the original SunStar2. USER S MANUAL KM 1750 1790 KM 1751 1791 Direct Drive 2 Needle drop feed needle feed sewing machine with automatic trimmer 1 FOR AT MOST USE WITH EASINESS PLEASE CERTAINLY READ THIS MANUAL A BEFORE STARTNG USE N 2 K P THIS MANUAL N SAFE PLACE FOR REF ERENCE WHEN THE MACHINE BREAKS DOWN 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 Please read this user s manual thoroughly before using the machine Make sure to properly use the machine to enjoy its full performance The specifications of the machine are subject to change aimed to enhance product performance without prior notice This product is designed manufactured and sold as an industrial sewing machine It should not be used for other than industrial purpose SunStar CO LTD Contents Machine Type and Specifications seiirt 6 1 1 Machine Type od ote PREOORERRRERUQIRUL Cini hun tee ia en ei unie 6 1 2 Specifications eei eel decoded dut esi Rt UR Rat ttbi 7 Safety Rules eoi Er erre Uer ORATE E OTE 8 2 1 Safety Stickers eene enne tenentes tenentes etes saei ttbe riae tr battuta 8 2 2 Machine Delivery ss ssssssssss
3. Automatic Backtack Device Standard feed Motor AC servo motor 550W Power Supply Single phase 100 240V 3 phase 200 240V 50 60Hz x Direct drive 2 needle drop feed feed needle sewing machine with automatic trimmer Model KM 1790 KM 1791 Item MG MBL BL Usage For General Materials For Heavy Materials Lubrication Minute Lubrication Adjustment Automatic Lubrication Max Sewing Speed 3 000 spm Max Stitch Length 5mm 7mm Needle Bar Switch Split Needle Bar Needle Bar Stroke 33 4 mm Needle Take up Stroke 52mm 64 6 mm Feed Dog Height 1mm Presser Foot Lift 7 mm manual 15 mm Lap 10 mm automatic Hook Standard Hook Large Hook Needle DP x5 11 16 16 14 22 22 Sewing Space 257 mm W 120 mm H 87 mm arm jaw Bed Size 518 mm x178 mm Thread Winder Attached to sewing machine body upper arm Automatic Backtack Device Standard feed Automatic Trimmer Standard feed Motor AC servo motor 550W Power Supply Single phase 100 240V 3 phase 200 240V 50 60Hz SunStar Safety Rules 2 1 Safety Stickers The safety stickers in this user s manual are divided into Caution Danger and Warning They indicate that if the safety rules are not kept injury or damage to machine might occur as a result Danger high No Name Description Caution If the machine is not properly handled it may cause injury to users
4. Once every two weeks is deemed the appropriate interval for oil refills 4 2 Test Operation pedal operation cause malfunction and has a bearing on the machine s durability magnet UN Do not touch or press with objects the moving or spinning parts of the sewing machine while it is in Caution operation It may cause injury or damage to the machine 1 Lightly press the pedal in the B position to make sure that the low speed sewing is properly conducted Press the pedal until the C position to check whether the high speed sewing is properly conducted 2 3 wm Press the pedal forward B or C position and release the pedal to locate it at the neutral A position And check whether the needle stops below the needle plate s front side in case where the lower position needle stop is set Press the pedal at the D position Press the pedal to D and move it to the neutral A position Then after trimming 4 wm the needle stops above the front side of the needle plate 4 3 Needle AN 1 Turn off the power stitch when installing the needle 2 If the pedal is accidentally stepped it may cause injury or accident Caution 4 3 1 Needle Installation 1 Turn the pulley to place the needle bar at the highest position 2 Place the needle s groove headed inward and thoroughly push the needle until its end touches the st
5. the remaining upper thread to be 35 45mm control box to see if the remaining upper thread adjustment volume is set at the low level The adjustment can be made using the remaining upper thread length adjustment volume on the control box 27 28 5 4 Adjustment of Presser Foot s Lift and Pressure Sewing Type Cause Corrective Actions LXX XXX Balanced good stitch gt X XX DC XX DXX gt When stitch skip takes place or when the stitch length is irregular Strengthen the pressure t Ca fa ae et y When puckering takes place Weaken the pressure 5 4 1 Adjustment of Presser Foot Lift Loosen the pressure adjusting screw and the tightening screw for the presser bar bracket With the presser bar lifting lever pulled up set the distance from the needle plate face to the bottom of the presser foot at 7mm and fasten the bracket tightening screw 5 4 2 Adjustment of Presser Foot Pressure Use the pressure adjusting screw to adjust the presser foot pressure When the adjustment is completed fasten the fixing nut D c o alk 9 6 Presser Bar Lifting Lever o 7 eG 0 4 9 D N gt oz E Pressure Adjusting Screw SunStar Maintenance A Caution 6 1 Adjustment of Feed Dog
6. 5 3 Adjustment of Thread Tension Before adjusting the thread tension make sure to turn off the power switch If the pedal is mistakenly stepped it may accidentally operate the sewing machine causing Caution injuries Sewing conditions may differ depending on sewing fabric thread stitch count and other conditions Make adjustments in line with the table below Sewing Type Cause Actions TIERS Balanced good stitch TIS EAA When the upper thread tension is too weak Strengthen the upper thread tension or gogo yop or the lower thread tension is too strong weaken the lower thread tension KEREI SGISSISSNSESSIE a When the upper thread tension is too strong Weaken the upper thread tension or or the lower thread tension is too weak strengthen the lower thread tension 5 3 1 Adjustment of Upper Thread Tension When the tension adjusting nut for the thread tension adjuster is turned clockwise the upper thread tension will get stronger When it is turned counter clockwise the upper thread tension will get weaker 5 3 2 Adjustment of Lower Thread Tension When the tension adjusting nut for the hook is turned clockwise the lower thread tension will grow stronger When it is turned counter clockwise the lower thread tension will grow weaker Weaker Stronger Latch Type Bobbin Case Type 26 5 3 3 A
7. after sewing work is done 9 Make sure to follow the cautions below Otherwise physical damage to the machine such as malfunction and breakdown might result Donot put articles on the S M table Avoid using a crooked needle or the needle with damaged tip SunStar 2 5 Repair and Maintenance When repair is needed SunStar A S engineers who have completed certain training course must carry out the repair 1 Make sure to turn off the main power supply and wait for four minutes for the machine to be fully discharged before conducting cleaning or maintenance of the machine N Servo motor and control box need 10 minutes before they are fully discharged after power supply cut Danger Caution 2 Do not modify the machine specifications or machine parts without substantial consultation with SunStar Otherwise the modifications may threaten the safety of the machine during its operation and cause safety accidents 3 Make sure to use SunStar s original parts for repair and parts replacement 4 When the repair is completed put back all the disassembled safety covers 2 6 Type of Safety Labels CAUTION A ai Do not operate without finger guard and safety devices Before threading charging Do not operate without finger guard and safety devices Before bobbin ard dk deani t itch r k RG d trum ene threading changing bobbin and needle and cleaning turn off the
8. in each linking device When this is done the roller 9gets to adhere to the right side of the cam s complementary straight line as can be seen in the picture 2 While maintaining this position adjust to make the movable knives on the right and the left protrude about 3mm from the fixed blade edge 2 Now tightly fasten the crank fixing screws on both sides If the initial position of the movable knives of both sides are to be adjusted slightly use the ball joint linking bar If only the movable knives are to be adjusted use the linking rod IE Te starting point of Movable knife initial comple Ec IDEM Sed assembling position l mentary t7 p movemen S straight line E F i EH 2 A G 5 i cx P E l E E peal i i 4 Adjusting lower thread holder See figure The position of lower thread holder 1 is set by fixed blade and bolt Like in the picture loosen the bolt 3 and place the lower thread holder edge at the lower side of the movable knife about 8mm apart from the movable knife edge Make sure to check that the right and left upper sides of the lower thread holder is tightly adhered to the lower side of the movable knife SunStar 5 Checkpoints on the assembling status of other trimming devices Check the starting point of the movable knife when the trimming action takes place Operate trimm
9. inserted into the eyes wash it off immediately in running water and see a doctor 3 Do not drink lubricant It may cause diarrhea and vomiting If lubricant is mistakenly drunk immediately see a doctor 4 Keep lubricant in a safe place out of the reach of children and youth 5 Use two hands when leaning the sewing machine backward or placing it back to the original position If only one hand is used it may slip away from the machine due to the weight and it may be stuck inside the machine 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 3 Check the tension of each driving belt When the regular checks are not properly performed the following problems might result Abnormal abrasion of the oiled parts due to the lacking supply of lubricant and grease 4 7 2 Cleaning Abnormal operation due to the dust and foreign materials stuck around the driving parts If the machine was left unused for a long time resume its operation after cleaning and maintenance activities 7 2 1 Cleaning Frequency and Method A Caution 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 NO Required Parts for Cleaning Cleaning Frequency 1 Arou
10. level Hook There is a scratch on the hook edge Remove the scratch on the hook edge Feed dog There is a scratch on the needle hole Remove the scratch on the feed dog of the feed dog Needle plate There is a scratch on the thread case Remove the scratch on the needle and around the needle plate plate Thread tension Upper and lower thread tensions are Adjust the upper and lower thread bad tensions 3 Poor thread Thread take up spring Thread take up spring tension is Adjust the thread take up spring adjustment tension inadequate tension Gap between opener The gap between the opener and hook Adjust the gap between the opener and hook is inadequate and hook Direction and height of Needle is inserted into wrong position Reinsert the needle correctly and push needle in to its highest level Needle Needle is bent Change the needle Threading Wrong direction Insert the thread in the right way Hook timing The timing between the needle and Adjust the timing between the needle hook is bad and hook Upper thread falls Gap between the Needle and hook are too far apart Adjust the position of the hook out when starting Needle and the hook 4 tosewor sewing Remaining upper thread The length of the remaining upper Increase the adjustment volume of the upper thread on the control box Lower thread holder After trimming lower thread holder does not hold the lower thread Adjust the location and tension of the lower thread holder Check
11. manually operate the solenoid shaft towards the arrow direction See whether it returns to its original position fast and smooth when released If not proceed with horizontal adjustment of the bracket 7 0 8 mm 1mm 6 6 2 Adjustment of linking device for movable knife shaft and the trimmer driving part See figure 1 2 3 4 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 First loosen the fixing screw of the movable knife shaft right hold the initial assembling angle of the crank right to be about 15 30 to the left from the perpendicular line drawn to its center 7 To make sure that this position is maintained adjust the length of the ball joint linking bar which comes assembled to trimmer shake linkage Also adjust the fixing screw tightly For the adjustment of the ball joint linking bar turn the linking bar after loosening the nuts left and right is left nut and Qis the right nut Then loosen fixing screw of the movable knife shaft crank left 9 and in the same angle as the crank right s 3 lower assembling angle place the crank left 0 Tightly fasten the fixing bolt to make sure this position holds When the linking device is connected as such the movement angles of crank left and
12. meet with the needle center When the lower end of the needle touches the needle guide plate of the hook adjustment of the needle guide s configuration loosen the screw and move the hook support left and right to adjust the distance between the hook s upper end and the needle groove to be 0 05 0 1mm When adjustment completes tightly fasten the screw again lian SunStar 6 3 Adjustment of Distance Between Hook Stopper Face and Needle Plate Groove Face The standard distance between the hook stopper face and the needle plate groove face is 1 3mm This distance can be adjusted using the thickness of the space washer which is located below the hook Loosen the fixing screw for the hook gear to separate the hook and insert the space washer which is initially assembled status after repair or replacement Space Washer Hook Gear Depending on machine model the washer in use may have different thickness As such make sure to use the initially assembled space washer 6 4 Adjustment of Distance Between Hook and Opener Loosen the tightening screw for the opener to set the distance between the hook and the opener at 0 2mm when the opener is pushed at the maximum in the arrow direction p Tightening and adjust the left and right sides of the opener Scre
13. or physical damage to the machine N Warni If the machine is not properly handled it may cause death or arning RU severe Injury to users Warning If the machine is not properly handled it may cause death or Danger severe injury to users and the urgency of the danger is very 2 2 Machine Delivery SunStar Mark Description Danger Ban people from standing under the machine and remove obstacles near the machine The machine delivery shall be conducted by the persons who are knowledgeable about the safety instructions and rules The following safety rules must be observed 2 2 1 Manual delivery When the machine is manually moved by workers they are required to put on safety shoes and firmly hold the machine on the left and right side of the table 2 2 2 Forklift delivery 1 A forklift shall be big enough to endure the weight of the sewing machine and carry the machine 2 Use the palette when lifting the machine Set the center of gravity of the machine center of the left and right sides at the fork arm of the forklift and carefully lift the machine KD Warning When the machine is moved by a forkl
14. rear b bere shion side of machine bed 2 Put machine body on the rubber cushion while sustaining pole putting hinges on the hinge bed rubber safe and sound 3 Insert the machine body sustaining pole into table completely If the pole is not inserted completely that may cause accidents because the pole cannot sustain the weight of machine body firmly when the body bent backwards hinge bed rubber 1 At least two persons shall be involved in the assembly of the sewing machine body to the table for safety 2 When the body is leaned backward if the support bar shakes safety accidents may occur Caution 3 3 6 Operation Panel Assemble the operation panel to the bracket and attach them on the rear side of the machine body SunStar 3 3 7 Thread Stand Assemble the thread stand and install it on the table Then adjust the location of the thread stand for convenient use 3 3 8 Lap Lifting Plate 1 Install the lap lifting plate below the oil pan and use the bolts to fix it 2 Use the location adjusting bolt of the lap lifting plate to move it to the proper location 3 3 9 Adjustment of Presser Foot Height 1 Turn the pulley to locate the feed dog below the needle plate Lap Lifting Plate r 2 When the presser foot is in the upper position adjustment is impossible Pull down the presser bar lifting lever to lower the pres
15. right during trimming movement results in an equal angle movements for left and right against the perpendicular lines and 9 that are drawn from the center line of the two movable knife shafts Hence it can be said that the trimming movement is very light 35 36 6 6 3 Adjusting movable and fixed knives 1 Adjusting the position of movable knife edge and hook stopper See figure When a movable knife 1 passes the front side of the hook stopper 2 adjust the distance 4 to be within 0 05 0 2 mm range like part 3 The upper surface of the movable knife edge should be set up 0 2mm below the upper side of hook stopper 5 Given that the fixed knife is pressing down the movable knife Clearance adjustment of the movable knife edge and hook stopper front side x Loosen the needle plate x Place the hook stopper in the hanging position to the needle plate x Holding the hook with the hand manually operate trimming movement so that the movable knife edge is matches the stopper front side 3 x Loosen the fixing screw of the movable knife shaft eccentric bushing x In the lower side hole of the eccentric bushing 8 stick in a thin driver or adequate pin i and turn right and left This will make the position of the movable knife shaft change hence changing the distance x When the clearance adjustment is finished tightly fasten the fixing screw of the bushing The adjustment 2 of cross
16. thread To do so loosen the clamp screws of the wiper and horizontally adjust the wiper about 0 3 mm 6 When the wiper 1 is in waiting position the distance between the wiper edge 1 and the presser bar equal point should be about 3 mm To do so loosen the clamp screw and vertically adjust the stopper 7 x Depending on the thread type there are cases where the thread cannot be hung to the wiper edge Hence it is necessary to bring the wiper into the range of the needle where the thread from the sewing material can be hung Make sure that the needle fixing screw does not get in the way of the wiper 0 5 1mm 7 The trace of wiper edge is as the above picture Adjust the wiper edge 1 by loosening the clamp screw and vertically adjusting the distance between the needle edge and wiper to 0 5 1mm 40 A Caution SunStar 1 Observe the mechanic and electric safety rules during the check and maintenance of the machine 2 Conduct lubrication while the machine power is off 1 Do not insert the power plug into the outlet until the lubrication completes While the power is supplied if the pedal is accidentally stepped and unwanted machine operation results it may cause injuries 2 When handling lubricant put on safety glasses and gloves to protect skin and eyes When lubricant contaminates hands wash it off in running water using soap If lubricant is
17. EE SSC OMA a glo SES WAIS main switch Y eH abseil y BAO SEA Fage APE 7 FUAS A WARNING au Hazarcbus voltage will cause injury Hazardous voltage will cause injury B t it at least 360 d i i i betre opening this DUI Be sure to wait at least 360 seconds before opening this cover after maf SME and MILE a pover mra turn off main switch and unplug a power cord Tet BRO os ZANE ene o 8 gae fn ze EROS E2 D H WREE E ORAS y 11 12 2 7 Location of Safety Labels A Erde Do nd qerate we Mm guad and safety devices Before trreadng changing bobin ard needle cleaning etc switch off pe main swta AVE sens ema go YEH pee DIMA Q A Bul ankh 4 Haue WHEA FUA AYE A FAAL ARBORE 2 pe s ore A paa ne Hazarcbus voltage will cause injury Be sure to wait at least 300 secmds 4 before opening this cover afte tun off main switch and unplug a power ord DY Bm ssp ARE 4 onz AE Sup SHE En Wa EBDE Bu od SunStar Assembly 3 1 Name of Machine Parts 3 1 1 Name of Machine Parts Thread winder Wiper Device Presser bar lifting lever Reverse button Presser foot Control box Lap lift lever Power switch Oil window Reverse lever Stitch length dial 2 S M pulley O P panel Thread Stand
18. Height Turn the pulley to place the feed dog at the highest position Then loosen the tightening screw for the feed dog support to move it up and down Adjust the feed dog to protrude some 1mm from the needle plate face in parallel 1 Skilled engineers should carry out repair and maintenance of the sewing machine 2 When electric repair and maintenance is needed request the distributor shops or electricity experts 3 If the safety devices are separated make sure to put them back into their original places 4 Use both hands to lead backward the sewing machines or place it back to the original place If only one hand is used due to the weight of the machine the hand might be stuck or other injury might occur 5 In the following cases turn off the power switch and pull off the power plug If the pedal is accidentally stepped unwanted operation of the sewing machine might occur causing injuries Regular check maintenance repair Replacement of supplies such as needle hook and blade Adjustment of lubrication to the hook 6 If adjustment is made when the power switch is on take extra care to secure safety 6 2 Adjustment of Needle and Hook Timing 6 2 1 Adjustment of Up Down Needle Bar Position Turn the pulley to place the needle bar at the lowest position Loosen the tightening screw for the needle bar holder to place the punched mark of the needle bar at the end of the frame
19. Safety devices 5 Thread take up cover Finger guard Motor cover 3 2 Installation Environment 3 2 1 Installation Environment 1 To prevent accidents stemming from mal operation do not use the machine if the voltage is 1096 above the rated voltage N To guarantee smooth operation of the product the installation environment shall be prepared as UE described in User s Manual Otherwise unexpected damage might occur to the product aution 2 Proper temperature during machine operation 0 40 C 32 104 F 3 Proper temperature during machine storage 25 55 C 13 131 F 4 Humidity Relative humidity within 45 85 3 2 2 Electricity Environment The voltage of the power supply should move within the range of 10 of the rated voltage Insert the power plug of the sewing machine directly into the AC outlet If an extension cord is used it Warning may cause mal operation of the sewing machine 1 Power voltage The power voltage shall be within 10 of the rated voltage Itis recommended to use the power frequency within 1 of the rated frequency 50 60Hz 2 Noise of electromagnetic wave Do not install the sewing machine next to a TV a radio or a cordless phone The machine may be interfered by a TV a radio or a cordless phone 3 Take care not to spill water and coffee on the machine 4 Do not drop Control Box and the motor to the floor Su
20. When adjustment is completed fasten the tightening screw for the needle bar holder again E 2 4mm 3 1750 Series 1790 Series 29 30 6 2 2 Adjustment of Crossing Timing of Hook s Upper End and Needle Center 1 Set the stitch length at 2 5mm for KM 1750 1750 7 1790 and 1790 7 models Set the stitch length at 3 5mm for KM 1750BL 1750BL 7 1790BL and 1790BL 7 models Loosen the tightening screw for the hook gear to make the upper end of the hook accurately meet with the needle center when the needle bar is placed 2 4mm above from the highest needle bar position When adjustment is completed fasten the screw again After the adjustment the upper hook will be located 1 1 5mm above the upper thread hole of the needle R E E re a i Wi E Wl E M 1t V Ny 2 3 For 1790 series if the height of the left and right needles is not same as displayed in the figure lift the needle bar 2 4mm from its lowest position If the upper end of the hook is not 1 1 5mm above the upper end of the needle thread hole in this case loosen the fixing screw to remove the needle holder and then adjust the fixing screw for the needle holder up and down to adjust the height of the needle Adjustment of Distance Between Needle and Hook s Upper End Lift the needle from the lowest position and make the hook s upper end
21. al is pressed When the sewing angle and the stitch length are known it is possible to find out by how many stitches the outer needle should be moved forward amenes N ange 30 4024 50 60 70 80 90 100 110 120 130 140 X No of 2 46 38 32 27 22 18 15 11 apie 3 46 3513 0 25 21 18 15 12 eds 4 a4 34 28 23 19 16 13 OD PRESS 5 48 35 27 22 18 15 13 ELESUM EHGESMNMIGHNE 6 40 29 23 19 15 13 left turn sewing 7 37 25 20 16 8 30 22 17 x When the sewing angle is 40 and the stitch length is 2 9mm the outer needle should move straight forward by six stitches 33 6 6 Adjustment of Trimming Devices 6 6 1 Adjustment of Trimmer Driving Part 1 Trimmer Cam Location Fixing Screw Turn the pulley by hand to locate the needle bar at the lowest position Put the trimmer cam and the lower shaft middle bushing closely together and turn the cam to Lower Shaft Punched Punched Trimmer Middle Bushing Mark Mark Cam make punched marks meet each other Then fasten the tightening screw N When the trimmer cam position is adjusted turn the pulley by hand to check whether it rotates smoothly Caution 2 Adjustment of Stopper Pin Holder Turn the pulley to place the trimmer cam within the scope of the complementary straight line Insert the trimmer oscillat
22. ase horizontally adjusting the assembling position of movable knife shaft collar 8 and correcting the shape of fixed blade 9 setting position Checking the surface adhesion x Apply magic ink on the upper side of the movable knife edge i zT t i l l l O l l I v 1 good x bad M d bad NES e eae e TT i LT OL T 37 38 3 Final fixing of the movable knife s initial position See figure A Caution x The standard initial assembling position of the movable knife 1 is where the movable knife edge protrudes about 3mm from the fixed blade edge 2 when the trimming action is finished that is when the movable knife is in its initial stop position When fixing the position of the movable knife the following directions must be followed so that the power generated in the cam is delivered without any loss to the trimming action Adjustment Order Manually turn the pulley to finish trimming of the trimming cam Place the cam so that the roller can enter the complementary straight line Slightly loosen the fixing screws 7 of movable knife shaft crank of both the left and the right Press the trimmer shake linkage to enter the roller inside the cam Push the linking bar to the right or the left crank linking rodq to the left so that there is no excess room
23. case loosen the screws D as can be seen in the picture and replace the feed dog or adjust the distance between the hook edge and the needle Fasten after making the adjustments 8 2 Assembly Order x Carry out the assembly in the reverse order of disassembly 45 46 Cause of troubles and troubleshooting is skipped length after trimming thread is too short No Symptom Checkpoints Root cause Corrective action Direction and height of Needle is inserted into wrong position Reinsert the needle correctly and push needle in to its highest level Needle Needle is bent Change the needle 1 Needle breaks Feed dog timing Bad timing of feed dog Adjust the timing of feed dog Gap between needle Bad timing of needle and hook The heads of the needle and the hook and hook interfere each other Adjust the timing of needle and hook Adjust the location of the hook Threading method Wrong threading inserted from the Thread the needle correctly opposite side Needle Bent needle Change the needle Direction and height of Needle inserted in the wrong direction Insert the needle correctly needle and height Upper thread tension Too tight upper thread tension Reduce the tension of upper thread 2 Thread breaks Lower thread tension Too loose lower thread tension Reduce the tension of lower thread Thread take up stroke Too large stroke Adjust the stroke
24. djustment of Thread Take up Lever Spring 1 Adjustment of Thread Take up Spring Motion Loosen the tightening screw for the stopper and adjust the spring stopper to adjust the spring motion The thread take up spring lever moves in the range from 5 tolO0mm 2 Adjustment of Thread Take up Spring Tension Loosen the screw on the thread adjusting shaft When the groove on the thread adjusting shaft is turned clockwise using a driver the thread take up spring tension grows stronger When it is turned counter clockwise the tension grows weaker The standard tension is 30 70g 5 3 4 Adjustment of Thread Release Motion automatic trimming If the upper thread escapes from the needle hole after trimming adjust the opening of the dish as below Activate the thread release solenoid and adjust the solenoid shaft collar back and forth to set the opening of the thread tension adjusting dish at 0 8mm If the thread release solenoid is not in operation check whether the dishes are closely contacted SunStar Z2 O 1 UN If the dishes are not properly separated despite their proper assembly check the front face of the Caution 5 3 5 Adjustment of Auxiliary Thread Adjuster automatic trimming Adjust the auxiliary thread tension adjusting nut to set
25. elow will be produced SunStar Code No Initial configuration What it means 30 1 Whether or not semi automatic comer work will Right needle up be carried out stop position T First round number of 31 1500 Speed of semi automatic corner work stitches 5 stitches 32 2 First round no of stitches for the right needle when the left needle is in up stop position 33 1 Second round no of stitches for the right needle when the left needle is in up stop position Se 34 5 First round no of stitches for the left needle pe y Ou when the right needle is in up stop position 5 Sfi lieh 35 5 Second round no of stitches for the left needle y when the right needle is in up stop position 36 450 Left and right needle solenoid waiting time Left needle up stop position order Left needle up stop position First round number of Stitches 2 stitches Second round number of stitches 1 stitch Right needle up stop position order x Details Corner sewing speed is 1500 spm and the retention time of left right solenoids is 45 seconds When the semi automatic corner sewing data has been entered and the left right button is pressed Caution 6 5 4 Table for Stitch Count Adjustment ex stitch length 1 4 See the beside table for accurate corner sewing and set the stitch length accordingly before sewing the semi automatic corner sewing will be conducted when the ped
26. fting pad If the pedal is accidentally stepped and the machine begins operating injury might occur as SunStar Sewing Methods 1 Make sure to keep all safety devices on their place to prevent any injuries 2 Please turn off the power switch in the following situations where accidental stepping of the UN pedal might cause injuries Replacement of bobbin and needle and upper thread placement Caution When the machine is left unused for a long or temporary leaving while the machine is in operation 5 1 How to operate the machine 1 Pull the two strands of upper threads with a hand and turn the pulley until the lower thread moves above the feed dog 2 Pull the upper thread toward the direction of the user and check whether the lower thread is smoothly released 3 Press the power button On button to make the panel lamp on and the sewing machine ready for operation 4 Set the operational panel based on the user s manual of Fortuna IV 5 The machine is ready to work It will start sewing when wm the pedal is pressed 5 2 How to Conduct Backtack Sewing 1 During sewing if the reverse switch or the reverse lever 2 is pressed the sewing materials will move backwards Otherwise they will move forward 25
27. gramming using the default values of A group codes from 30 to 36 1 Call Code 30 and enter 1 as the default value When is entered the semi automatic corner sewing can be conducted When 0 is entered the function cannot be conducted 2 Call Code 31 and set the sewing speed for corner sewing The speed can be freely adjustable at the range of 24spm to 2040spm 3 Corner sewing Direction Setting Left corner sewing When the left needle stops at the highest position enter 32 as the first sewing stitch count for the right needle and enter 33 as the second sewing stitch count Right corner sewing When the right needle stops at the highest position enter 34 as the first sewing stitch count for the left needle and enter 35 as the second sewing stitch count for the left needle The number of stitches for left and right needles ranges from 0 to 64 Conduct the programming as set forth above and operate the machine following the semi automatic corner sewing method as explained above Then the semi automatic corner sewing will be repeated using the pre entered data 4 Code 36 o protect the left and right solenoids the automatic power off time after their operation is completed can be set The default value is 450 45 seconds and it can be set at the range of 5 0 5 seconds to 1275 127 5 seconds 5 Exercise Please enter the data below and conduct corner sewing Then the sewing results as b
28. ht sliding plates SunStar 4 4 5 Routing the lower thread Applicable Models Applicable Models a KM 1750 MG a KM 1790 MG b KM 1750 MBL b KM 1790 MBL 50mm ge e uj A Insert the bobbin into the hook A Insert the bobbin into the bobbin case 2 B Insert the thread through A part of the hook For KM 1790 MG it is crucial to insert the and pull it out from the end of the lower bobbin in the turning direction as in the thread tension adjustment plate picture C The adequate length of the pulled out lower B Insert the thread through A part of the thread is 50mm bobbin case and pull it out from the end of the lower thread tension adjustment plate 3 C Pass the pulled out thread through B and C of the bobbin case as can be seen on the picture and hang it onto the lower thread holding spring Then pull it out through the thread hole D The adequate length of the pulled out lower thread is 50mm Application Standard Application Standard KM 1750 MBL KM 1790 MBL 50mm 23 24 4 4 6 Upper Thread Placement UN When separating the bobbin case turn off the power switch Caution Turn the pulley to locate the thread take up lever at the highest position and place the upper thread Place the left hand thread first 4 4 7 Using Lap Lifting Pad The presser foot can be lifted or lowered using the lap li
29. ift a crane or a transporting device the balance of the machine must be maintained in order to prevent any deformation of the machine and injury of the workers 2 3 Machine Installation Caution Depending on the installation environment function errors breakdown or other physical damage might result Make sure to meet the following conditions for machine installation 1 The workbench or table where the machine is installed should be durable enough to endure the weight of the machine see the name plate 2 Dust and humidity are the cause of machine pollution and erosion Please install an air conditioner and conduct regular maintenance of the machine 3 wm Install the machine at the place where it is not exposed to direct sunlight if the machine is exposed to direct sunlight for a long time it may cause discoloration or deformation 4 Secure the space around the machine Place the machine at least 50cm away from the left right and rear walls to secure sufficient space for maintenance activities 5 wm Explosion risk To prevent possible explosion immediately stop the machine operation if there are inflammable materials in the air 6 Lights Lights are not additionally supplied with the machine If needed install lights to prevent any inconvenience during work 7 Overturn risk Do not install the machine on the
30. ight tenente tenentes ttnna tato etna ito 29 6 2 Adjustment of Needle and Hook Timing see oni toni etenim 29 6 3 Adjustment of Distance Between Hook Stopper Face and Needle Plate Groove Face 31 SunStar 6 4 Adjustment of Distance Between Hook and Opener LEE ETE 31 6 5 Suspension of Needle Bars left right KM 1790 series 31 6 6 Adjustment of Trimming DeviGeS M onse eestetonatorhyeit i ra eite BRA dd 34 6 7 Replacement of Moving and Fixed Blades nnn 39 6 8 Adjustment of wiper eeiam PUOI HI FONS dte ee Ner S IRI Stripe 40 Le CHECK and Gonfllm eerte eire ee rtu eid 41 7 1 Regular Check Paints casusedededas ein t oii HIPH AHRG OUS HULHU RAT HA 41 2 2 4C leatanid cain QUERN T r QUAM NE 41 73 Lubrication 894 steed t kee ekeit teiti ae e T aaa e ENES tte 42 7A Status Check reece i EEE EEEE AE a ERE 43 7 5 Grease Supply KM 1750SF xen toritate nid ides bte tont eie d 44 8 Replacement of Stitch Length Gauge Gel i e e e 45 8 1 Disassembly Order essentiale ere derit n iu eerte ERE 45 8 2 Assembly Order ossesessettedtiotieeentee ute nisal mp dip qe E De cni una ails 45 9 Cause of troubles and troubleshooting 46 Machine Type and Specifications 1 1 Machine Type Direct drive 2 needle drop feed sewing machine with automatic trimmer KM 175 LJ EJLI E Ld Lubrication Type Application Hook Code Trimming Semi Dry Type Dry Th
31. in Materials Standard Hook None None Trimming Micro Lubrication Head Type General materials Large hook 7 Trimming Auto Lubrication Type Heavy materials Direct drive 2 needle drop feed feed needle sewing machine with automatic trimmer KM 179 LJ EIL E Ld Lubrication Type Application Hook Code Trimming Micro Lubrication Dry Type Head General materials Standard Hook None None Trimming Auto Lubrication Type Heavy materials Large hook 7 Trimming 1 2 Specifications x Direct drive 2 needle drop feed sewing machine with automatic trimmer KM 1750 KM 1751 SF MG MBL BL Lubrication For Thin Materials For General Materials For Heavy Materials Semi dry Minute Lubrication Adjustment Automatic Lubrication Max Sewing Speed 3 000 spm 4 000 spm 3 000 spm Max Stitch Length 4mm 5mm 7mm Needle Bar Stroke Needle Take up Stroke Feed Dog Height 62 4 mm 1mm Presser Foot Lift 7 mm manual 15 mm Lap 10 mm automatic Hook Standard Hook Large Hook Needle DP x5 9 14 11 11 16 16 14 22 22 Sewing Space 257 mm W 120 mm H 87 mm arm jaw Bed Size 518 mm x178 mm Thread Winder Attached to sewing machine body upper arm Automatic Trimmer Standard feed
32. ing height between the hook stopper upper side 5 and movable knife edge upper side is possible to certain degree by adjusting the movable knife base washer 7 or by changing the position of movable knife shaft collar amp as can be seen in figure SunStar 2 Adjusting movable and fixed knife See figure Like in figure adjust the position of the fixed knife so that the fixed knife right side edge matches the movable knife inner side edge The initial assembling position of the movable knife is where the movable knife edge protrudes about 3 mm from the edge of the fixed blade Please check the final fixing of the movable knife initial position on page 38 The surface adhesion conditions of fixed blade edge and movable knife upper side have huge impact on its trimming capacity Please note the various cases of movable fixed knife surface adhesion conditions on the picture Correcting the adhesive conditions of movable and fixed knives x Like in figure operate manual trimming movement with magic ink on the movable knife edge By checking the ink trace remaining on the movable knife the surface adhesion condition of the movable fixed knives can be tested x Ifthe surface adhesion is not very good same method is used to adjust the tension of movable fixed knives please use the following methods adjusting the amount and position of the washer 7 in the lower side of the movable knife b
33. ing movement manually to check whether the thread take up lever is in the lowest or at least 2 5 mm raised level when the movable knife starts working like in figure c 0 2 5mm Point where the movable knife starts Thread take its movement up lever s lowest point Maintenance of fixed blade When the thread does not get trimmed or if the trimmed section of the thread is sloppy please check the edge condition of the fixed blade If the edge of the knife is too dull sharpen the edge using oil stone or sand paper See figure OIL STONE SAND PAPER 6 7 Replacement of Moving and Fixed Blades 6 7 1 Replacement of Moving and Fixed Blades 1 Lift the presser foot open the sliding plate and disassemble the needle plate 2 Disassemble the washer the fixed blade and the lower thread holder and then disassemble the moving blade Moving Blade 39 6 8 Adjustment of wiper about 0 3 mm 1 Set the needle at the needle position on the control after trimming 2 Set the stitch length at dial 2 3 When pressing with hand as in the picture the wiper edge should protrude about 0 3 mm from the needle edge Loosen the four clamp screws to vertically adjust the solenoid 4 Hang the thread onto the two needles 5 The position of the wiper edge D should look like the picture where the two hooks of the wiper D can securely hang the
34. nStar 1 To prevent safety accidents at least two persons should be involved in the installation and N transportation of the machine 2 It is recommended to use the table supplied by SunStar If the table is internally made the table should be at least 40mm thick and durable enough to support the weight of the sewing machine 3 3 Machine Installation 3 3 1 Table Installation 1 Table Fixing Insert the shock absorbing rubber into the level adjuster and turn it until the caster can move freely Fasten the nuts after table installation and fix the level adjusters 2 Adjustment of Table Height Use the bolt attached to the table to adjust its height to the level that enables convenient work for the users Nut Level Adjuster Shock absorbing Rubber Caster 3 3 2 Installation of Control Box 1 Location of Control Box and Petal Install the bracket the pedal switch and the connection rod and then properly adjust the length of the connection rod 3 3 3 Installation of Oil Pan 1 Attach four cushion rubbers to the corners of the oil pan and install the oil pan to the table 2 Insert the lap lifting cap into the oil pan 3 3 4 Hinge Rubber 1 Install two hinge rubbers on the table and use nails Hinge Rubber to fix them on the table 3 3 5 Assembly of Sewing Machine 1 Insert two hinges firmly into the holes of the
35. nd Hook Daily 2 Thread take up lever thread tension adjusting device Once a week Around the moving and fixed blades 3 Remove the dust from the moving and fixed blades located below the Three times a week needle plate using air 4 Treatment of Waste Oil Once a month 41 42 7 2 2 Cleaning 1 Place the needle at the highest position 2 Disassemble the bobbin after opening the left and right slide plates 3 Use the soft brush etc to remove dust from the hook and the feed dog 4 Remove the bobbin after the cleaning completes 7 3 Lubrication 7 3 1 Lubricant Use the original SunStar s lubricant in the accessory box 7 3 2 Oil Tank Fill up Remove the rubber cap and supply oil until the full mark on the oil window 7 3 3 Oil Cover Fill up Lean backwards the sewing machine and check the oil in the oil cover Supply oil until the full mark 7 4 Status Check 1 Replace the needle if it is deformed or the tip is damaged 2 Check whether the upper thread is properly placed 3 Conduct the test sewing SunStar 1 Upon lubrication make sure that lubricant does not overflow Check the supply volume during N lubrication Caution may take place 7 4 1 Adjustment of Lubrication to Hook 1 Oil Amount Check Turn off the power and remove the thread from the needle and the thread take up lever
36. opper and then fasten the needle with the fixing screw KM 1750 Series KM 1790 Series 4 4 Thread Turn off the power switch to separate the bobbin case If the pedal is accidentally stepped it may cause injury 4 4 1 Separation of Bobbin and Bobbin Case 1 Incase of a regular hook Latch type Turn the pulley to place the needle at the highest position Open the sliding plate and remove the bobbin by erecting the bobbin holder SunStar 2 Incase of a large hook bobbin case type Turn the pulley to place the needle at the highest position Open the sliding plate and remove the bobbin and the bobbin case by erecting the bobbin holder 4 4 2 Lower Thread Winding N Take caution for the spinning or moving parts when winding the bobbin Injury or damage to the machine might be caused Caution 1 Insert the bobbin into the thread winding shaft on the winding base which is attached to the upper arm 2 Wind the thread around the bobbin several times and lift the presser bar by using the presser bar lifting function Attach the thread winding lever to the bobbin and press the pedal to wind the thread around the empty bobbin After the thread winding lever is separated from the bobbin use the thread winding blade to cut the bobbin thread 3 4 4 4 3 Adjustment of Thread Winding Volume Loo
37. or link fully into the roller and adjust the holder to ensure the close contact between the trimmer oscillator link and the right side of the roller Adjust the holder to ensure the close contact between the stopper pin and the left side of the stopper pin holder Complementary Straight Line Fixing Screw SN eee andi y Q Trimmer Oscillator Link Point of Trimming gt A Completion Close Contact dem Trimmer Cam Point of Moving Blade Motion Start x The current stop position of the cam indicates that the Trimmer Cam Guide cam guide is within the complementary straight line before the roller is removed after trimming When the stopper pin holder adjustment completes if the trimmer oscillator does not move smoothly minute adjustment of the holder is required Caution SunStar 3 Fixing the position of the trimmer solenoid ass y See figure When the whole trimmer shake linkage 1 is in up position that is when it has come back to its original position after finishing trimming the distance between the lower part of the roller 2 and the equal point of the trimming cam is about 0 8 1mm Assuming that this distance 4 never changes adjust the position of solenoid bracket 7 horizontally where the solenoid housing 9 is attached to make the solenoid stroke 5 4 mm Then tightly fasten with fixing screw 8 After adjusting the solenoid stroke
38. rt thread Tension of auxiliary Too strong tension on the auxiliary Adjust the tension of the auxiliary 6 length after thread tension thread tension control assembly thread tension control assembly trimming adjustment assembly Thread take up stroke Thread take up stroke is too large Adjust the thread take up stroke Thread release adjustment volume on the control box Volume is adjusted to too low Increase the volume adjustment 47
39. s grease product to supply grease every six months by using the enclosed supplying device 7 5 2 How to Supply 1 Turn off the power 2 Loosen the screws 3 Supply grease through the part marked with an arrow 4 Reassemble the screws 5 Turn on the power oil level adjustment screw fixing nut i ll a l BO il sl d ic j SunStar Replacement of Stitch Length Gauge Set UN Carry out the replacement while the power is off Caution 8 1 Disassembly Order 3 Disassemble the left and right needle holders KM 1790 series 1 Remove the right and left slide plates 2 Remove the two needles 3 Disassemble the needle holder T D x turn it towards the arrowed J f direction for removal LS KM 1750 series T I hep ol d 4 Lift the presser bar lifter to raise L Eu X the presser foot SS rum 5 Remove the presser foot 6 Remove the needle plate 7 Disassemble the feed dog 8 Lay down the sewing machine Adjusting the left right hook base When replacing with a wider or narrower gauge than the needle width in use the hook edge and needle distance may not fit correctly In this
40. sen the screw on the thread winding plate to adjust the location of the thread winding plate and the wound thread volume UN The wound thread volume should be up to 80 Caution 21 22 4 4 4 Bobbin Installation 1 To separate the bobbin case turn off the power switch If the pedal is accidentally stepped injury might result due to unwanted machine operation Caution 2 Upon the bobbin installation insert the anti spinning spring into the bobbin case 1 Standard hook Latch type Upon trimming insert the anti spinning spring into the bobbin case Install the bobbin on the hook in the thread winding direction Move the thread to the A part of the hook and make the loose thread 50mm Close the left and right sliding plates 2 Large hook bobbin case method Upon trimming insert the anti spinning spring into the bobbin case Install the bobbin on the hook in the thread winding direction Move the thread to the A part of the hook and make the loose thread 50mm Close the left and right sliding plates 3 Feeding each needle bobbin case method KM 1790 Upon trimming insert the anti spinning spring into the bobbin case Install the bobbin on the hook in the thread winding direction Pass the thread in the order of A B and C and make the loose thread 50mm Close the left and rig
41. ser foot 3 Use the adjusting screw to adjust the height of the presser foot from 10mm the standard height to 15mm the maximum height Presser bar lifting lever Machine Operation 4 1 Lubrication A Warning A Caution 4 1 1 Lubrication Lean backwards the sewing machine and supply lubricant using the lubricant can until the punched mark of the oil cover Usethe lubricant supply can which is located in the accessory box to supply lubricant into the oil tank Remove the rubber cap and supply lubricant until it reaches between the up and down punched marks on the oil window 1 Until oil supply is completed do not insert the power plug into the outlet If the power is supplied and the pedal is accidentally stepped injury might occur due to unintended machine operation 2 When handling lubricant put on safety glasses and gloves Take extra care to prevent lubricant from touching eyes and skin When lubricant contaminates hands wash it out in running water using soap If lubricant contaminates eyes immediately wash them out in running water and see a doctor 3 Do not drink lubricant It may cause diarrhea and vomiting If you drink lubricant immediately see a doctor 4 Keep lubricant in a safe place away from the reach of children and youth 1 At the first use of the sewing machine after purchase or when the machine is used after it has no
42. sssessssssssosssssnssnnssssssoseessnnssnussssocassenssnnssssessssenssunssoeassonsssasssseees 9 53 Machine Installation ed ERREUR EROR UBER URN AREE NOH NER UL R TRAE 10 2 21 Machine Opera tia lese e Rea RUEDA DURAN UENRHR A AR RUE SQUARE RARE UH 10 2 5 Repair and Maintenance ve eredi diuitiis 11 2 6 Type of Safety Labels essersi o reip tee bec FEROX E FRANE aiU 11 2 7 Location of Safety Labels eee teen ttt entnn ttes bnent itte sbnek ttti bobk iade 12 Assembly eqq fen Rte ib addi uM Ra 13 3 1 Name of Machine Party 5c tod pde h ted a in n oce eda hen tid ed 13 3 2 Installation Enyitonment weoteetec ePi ERE NRERR RR n a HERR n S 14 3 3 Machine Installation ques uos a Be audae el d 15 Machine Operation M M 18 4 TADUCAUOH eene ee ee ee 18 4 2 Test Operation pedal operation o tnter eredi ste eeeperenes eo ocio 19 AB celle Sepa e DERE PERRO UE RU IRR RURSUS aR RUE 20 AA Thread RERO QE REGARDER ERRRA UA ORURNSBUSIRASRARER UAR AE REM EOIN AA 20 3 Sewing MetliOdS omo e er rere eere ver eet erg eere ES certs 25 5 1 How to operate the machine rte tnnnnntttn sentiet ntenn testet tses son iniis 25 5 2 How to Conduct Backtack Sewing mE 25 5 3 Adjustment of Thread Tension eseititerie ge HH HER Re erii pe bie ge a Here eR 26 5 4 Adjustment of Presser Foot s Lift and Pressure nnne 28 Malintenanle eorr rrr eh rrr rne eret eren 29 6 1 Adjustment of Feed Dog He
43. t been used for a while oil supply is required 2 Use the SunStar s original lubricant products lubricant is in the accessory box 3 When supplying lubricant check the supplied volume to make sure that lubricant will not overflow During lubrication insert the outlet of the oil can into the oil cover to prevent oil spilling on the floor 4 1 2 Others Use the lubricant can to supply two to three drops of lubricant around the oil wick and felt SunStar 1 Arm lubrication Disassemble the face plate and lubricate the major friction areas of the parts including the thread take up hinge pin the needle bar frame the thread take up holder the thread bar crank and the guide block gear felt 4 1 3 Oil supply KM 1751 1791 Series 1 Installing chip remover magnet Attach the magnetic chip remover that is in the accessory box to the oil fan 2 Bed lubrication Lower shaft s front bushing lower shaft s middle bushing felt hook support s N Do not use the magnet for other purposes Use of the sewing machine without the magnet may Caution 2 Lubricating the oil fan A Fill the lubricant up to the HIGH mark B The lubricant must be SUNSTAR s oil provided exclusively for industrial sewing machines or SHELU s Tellus C10 C If the oil in use is down to the LOW mark fill in to HIGH immediately D
44. the up stop position of the needle Due to problems in the up stop position of the needle the thread take up lever pulls the upper thread out of the needle when the sewing starts Readjust the needle s up stop film position Check the oil felt tension of upper thread The upper thread oil felt is pressing the thread too strongly Adjust the felt tension SunStar No Symptom Checkpoints Root cause Corrective action The gap between the The height and distance between the Readjust the movable knife setting movable knife and the movable knife and the hook do not position hook match Check the tension of Tension and contact of movable and Correct the tension adjustment and fixed knife fixed knives are bad surface contact of movable and fixed 5 Trimming errors knives Direction of the needle Needle is not inserted correctly Insert the needle correctly Blade side of movable Scratch and abrasion of movable and Replace movable knife or fixed knife and fixed knives fixed knives Trimming cam timing The timing of trimming cam is wrong Adjust the timing of trimming cam Thread release stroke Thread release stroke is too small Readjust the thread release stroke Trimming timing Wrong trimming timing Adjust the trimming timing Opening of the thread The opening on the thread tension Adjust the thread release stroke tension adjusting plate control plate is too small Too sho
45. unstable stand or table If the machine drops it may cause injury or severe impact on the machine If the machine is suddenly stopped or the external impact is imposed the machine might be capsized 2 4 Machine Operation Warning The machine body is attached with Caution and Warning stickers at each dangerous part to emphasize safety instructions With the full understanding of the safety instructions make sure to observe the following during machine operation 1 Before turning on the power read this manual thoroughly and have a full understanding of machine operation 2 Get properly dressed Long hair necklace bracelet or wide sleeve might be fed into the machine during operation Wear slip free shoes to prevent slipping on the floor 3 Check the moving scope of machine before its operation to find out whether the scope is proper 4 Keep hands and head away from the machine parts where accidents might occur needle hook thread take up lever pulley etc during operation 5 Do not remove the safety cover which protects pulley and shaft during machine operation for user s safety 6 Cut the power supply before disassembling the electric box such as the control box and double check that the power switch is Off 7 Make sure that the power switch is Off when the upper shaft is manually rotated 8 Stop the machine when the needle is replaced or when inspecting the machine
46. w 6 5 Suspension of Needle Bars left right KM 1790 series 6 5 1 Button Use 1 Suspension of Left Right Needle Bars when conducting corner sewing at left right sides Press the needle bar switch of the desired spinning direction and then the concerned button lamp blinks de 2 Switch to 2 Needle Sewing Press the switch button which is blinking again to EE j Suspend cancel the setting l 7 e 31 6 5 2 Program Application for semi automatic corner sewing The model equipped with E Type controller can carry out program guided corner sewing For semi automatic corner sewing necessary data and code numbers should be entered into the program box in advance To switch from general sewing to corner sewing press a desired left needle or right needle button and press the pedal once Then the concerned needle will stop at the highest position and the opposite needle will stop after sewing the pre defined number of stitches Set the sewing fabric at the different angle and step the pedal again Then the needle bar stops after sewing the pre defined number of stitches At the third pressing of the pedal the suspended needle at the highest position will be automatically released and the regular two line sewing will be conducted 6 5 3 Programming Order Have a thorough understanding of program entry methods from the electric electronic manual and conduct pro
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