SunStar SS-7350 Series User Manual
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SunStar SS-7350 Series User Manual

SunStar SS-7350 Series User Manual

Small cylinder bed interlock sewing machine
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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
SS-7350 Series
Small cylinder bed interlock
sewing machine
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 - - 0 0 9 9 0 0 9 9 2 2 9 9

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  • Page 1 USER ’ ’ S MANUAL SS-7350 Series Small cylinder bed interlock sewing machine 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.
  • Page 2 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.
  • Page 3 Classification of Pattern Types Bed Type & No. of Needle 7350 Small Cylinder Bed-3Needle Main Motor Symbol of Series Fortuna Ⅴ Motor S UNSTAR Clutch Motor S mall Cylinder Bed Chain Stitch M/C Needle Space Top Cover Thread 3.2mm Without Top Cover Thread 4.0mm 4.8mm With Top Cover Thread...

  • Page 4: Table Of Contents

    CONTENTS 1. Machine Safety Regulations ..................6 1) Transporting machine ......................6 2) Installing machine ........................ 6 3) Repairing machine ....................... 6 4) Operating machine ....................... 7 5) Safety devices ........................7 6) Caution mark position ......................8 7) Contents of marks ........................ 8 2.
  • Page 5 7. Standard adjustments of the sewing machine .......... 21 1) Needle used ........................21 2) Installation of needle ......................21 3) Threading ..........................22 4) Adjustment of thread tension ..................... 22 5) Adjustment of presser foot tension ..................23 6) Adjustment of presser foot position .................. 23 7) Adjustment of stitch length ....................

  • Page 6: Machine Safety Regulations

    Machine Safety Regulations Safety instructions on this manual are defined as Danger, Warning and Caution. If you do not follow the instructoins, physical injuries and machine damages might be occurred. Danger : This indication should be observed definitely. If not, there will be a danger during the installation, conveyance and maintenance of the machine.

  • Page 7: Operating Machine

    4) Operating SS 7350 Series is made to sew patterns on fabrics and other similar materials for industrial use. machine Follow the following indications when operating the machine. ⓐ Read through this manual carefully and completely before operating the machine. ⓑ...

  • 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 and needle, cleaning etc. switch off main switch.

  • Page 9: Names Of Machine Parts

    Names of machine parts ⒔ ⑧ ⑨ ⑥ ⑦ ⒕ ① ⑤ ⑩ ⒖ ② ⑮ ⑪ (21) ⒗ ④ ⒃ ⑭ ⑫ ③ ⑬ ① Arm ⑩ Thread-adjusting device ② Bed ⑪ Oil gauge ③ Cylinder ⑫ Main feed adjusting screw ④...

  • Page 10: Specifications

    Specifications SS 7350 Series Model Description Small cylinder bed-3Needle interlock sewing machine Stitch Type ISO 406,407,602,605 For use General seaming of knitted materials, T-shirt collar, children clothes sleeves Sewing speed Max. 4,500 s.p.m 1.4~4.2mm Stitch length Stitches per inch: 6-18; The number of stitches per 30mm: 7-21 Needle UY×128GAS No.

  • Page 11: Installation

    Installation 1) Installation of table ⑴ Types of table A. Table Top Type (trimming) 다리 장착 위치 다리 장착 위치 (275) Stand Mounting Position Stand Mounting Position 57±0.3 159±0.5 3-ф9(Hole thru) ф17(Hole thru) ф25 (255) ф50(Hole thru) ф40 4-ф7(Hole thru) 4-R20 47.5±0.3 K"...
  • Page 12 C. Semi-Submerged Type (Trimming type) 다리 장착 위치 다리 장착 위치 (275) Stand Mounting Position Stand Mounting Position 159±0.5 57±0.3 3-ф9(Hole thru) ф17(Hole thru) V-벨트중심 Center of V-Bel t (255) ф50(Hole thru) 4-ф50 4-ф13(Hole thru.) 4-R20 4-ф25.5C'B Depth3 K″ 47.5 Section K-K″...
  • Page 13 E. Options for small-sized motor type [ Figure 5 ]...
  • Page 14 ⑵ Installation of table-top type table ⑤ Machine Oilpan ⑤ ① ⑤ ⑤ ① ② ② Table Table ② ② ③ ③ ④ ④ [ Figure 6 ] [ Figure 7 ] Mount the sewing machine as shown in Figure 6 and 7. Fix the table with screws and nuts.

  • Page 15: Installation Of Motor And Belt

    ⑷ Installation of small-sized motor type table (option) ⑤ Oilpan Machine ⑤ ① ⑤ ⑤ ② ① ② Table Table ③ ② ② ③ ④ ④ [ Figure 11 ] [ Figure 10 ] Mount the sewing machine as shown in Figure 10 and 11. Insert the screw and nut into the table, and place the rubber cushion on the bolt.

  • Page 16: Adjustment Of Belt Tension

    3) Adjustment of belt tension ② ① Be sure to turn the power switch off before adjusting belt tension. Warning 10~20mm Turn the screw④ of the motor③ around. Adjust the belt ① to go in approximately 10~20mm when its center portion is pushed with a finger.

  • Page 17: Installing Cover For Needle Bar Thread Guide

    5) Installing cover for needle bar thread guide ① As illustrated in the figure, fix the cover② for needle bar thread guide onto the arm with two screws①. ② [ Figure 16 ] 6) Installation of thread guide plate Use screws ① (2 each) to mount the thread guide plate ② onto the arm as described below in the figure. ②...

  • Page 18: Sewing Speed And Rotating Direction Of Pulley

    Warning 1) Lubricating oil Use industrial-purpose lubricating oil supplied by SunStar or SF oil by YANASE for this particular type of sewing machine. Do not put foreign materials into the lubricating oil. It will degrade the lubricating oil and cause mechanical breakdowns.

  • Page 19: Supplying Oil

    2) Supplying oil ① ② ③ [ Figure 19 ] [ Figure 20 ] The sewing machine is not oiled when shipped out from the factory. To ensure trouble-free use of the sewing machine, open the upper rubber lid ① and supply oil to the upper line of the oil gauge ③. Too little oil may cause mechanical breakdowns and too much may degrade the quality of sewing materials.

  • Page 20: Cleaning The Oil Filter

    5) Cleaning the oil filter Oil will not supply smoothly if dust gets built up in oil filter ①. Check the oil filter once every six months. Check the oil filter through the oil window if there is no or only little amount of oil being supplied.

  • Page 21: Standard Adjustments Of The Sewing Machine

    Standard adjustments of the sewing machine 1) Needle used This sewing machine uses UY128GAS needles. Japanese size Needles come in various size. Select the most appropriate Metric size needle depending on the thickness or the type of sewing materials. 2) Installation of needle Turn the power switch off before installing a needle.

  • Page 22: Threading

    3) Threading Insert the thread as shown in figure 27 for 3-needle sewing machine. If treading is not done correctly, stitches may skip, threads may break or tension may be uneven. A, B and C stand for each needle thread, D for top cover thread and E for looper thread. Except for the second needle thread in the case of 2-needle sewing machine, refer to the above instructions for threading.

  • Page 23: Adjustment Of Presser Foot Tension

    5) Adjustment of presser foot tension If the sewing material is in good condition, it is better to have as little tension as possible on the presser foot. Loosen the presser bar nut① and turn the presser bar screw ② ②...
  • Page 24 ⑵ Change of stitch length ② ① ③ [ Figure 32 ] When the adjusting handle① is turned clockwise, the stitch length widens. When it is turned counter-clockwise, the stitch length is reduced. When the stitch length is adjusted with the lever and the adjusting handle① is turned, within the scope from the lever scale to the stopper②, fix the lever at a certain location with a nut③.

  • Page 25: Adjustment Of Differential Feed

    8) Adjustment of differential feed Be sure to turn the power switch off before adjusting differential feed. Warning [ Figure 33 ] Loosen and move upward the fixing screw① and then it becomes differential feed (1:1.4). When the fixing screw is moved downward, the reverse differential feed is possible.

  • Page 26: Lubricating Device Of Needle Thread And Needle Cooling Device

    9) Lubricating device of needle thread and needle cooling device Be sure to turn the power switch off before work. Warning ② ① [ Figure 34 ] [ Figure 35 ] High-speed sewing generates heat as a result of frictions between the needle and sewing materials. Heat may result in thread breaks, skipped stitches, or enlarged stitch holes when used with polyester threads or fabrics.

  • Page 27: Fine-Tuning Of The Sewing Machine

    Fine-tuning of the sewing machine 1) Adjustment of needle thread tension Turn the power switch off before adjusting tension. Warning For some types of threads, looping is not an easy thing to do. Wrong loops may make it difficult for the looper to pass needle thread loop and cause skipped stitches.
  • Page 28 Fix the thread take-up lever⑤ at 57mm away from the ⑥ center of the fixing screw⑦ X(-) X(+) when the thread take-up lever⑥ is horizontal at the highest 57mm position of the needle bar. To tighten thread, move the thread take-up lever⑤ in the (- )X direction and to loosen thread, move it in the (+)X direction.

  • Page 29: Adjustment Of Looper Thread Tension

    2) Adjustment of looper thread tension Be sure to turn the power switch off before adjusting tension. Warning The standard setting is to match the punched mark② on the looper thread take-up lever guide support① with the thread ① holes of the thread guides③,④. ④...
  • Page 30 ⑵ Installation of top cover thread guide The clearance between the lower side of the top cover ⑥ thread guide④ to the upper side of the spreader① is ④ 0.5mm. ⑤ Fix the screw⑤ when the spreader is at its far right, in 1.0mm order to hook the thread well onto the thread hooking ④...

  • Page 31: Adjustment Of Needle And Looper Timing

    Needle the left and right position of the loopers. Timing Gauge is an optional part. If needed, you may ask for the purchase to where the product was bought or SunStar directly. [ Figure 49 ] ※ Use Timing Gauge Timing Gauge is marked with such scales as A, B, C, D and E depending on needle distance.
  • Page 32 ⑵ Angle and height for looper attachment Insert the looper deep inside the looper holder① and fasten the fixing screw②. Then the attachment angle of 2° and the height are determined. ② ① [ Figure 50 ] ⑶ Location of looper cam The figure shows the looper cam view from the needle bar direction.
  • Page 33 ⑷ Needle height 0.5~1.0mm ① [ Figure 53 ] [ Figure 54 ] When the end tip of the looper passes the left needle center, it must pass the needle groove at 0.5~1.0 mm off from the upper part. In other words, the height of the needle is set by the looper. Using a driver, unfasten the screw①...
  • Page 34 ※ Front/rear position of needle guard(R) ③ ② 0~0.05mm [ Figure 57 ] [ Figure 58 ] When the end tip of the looper comes to the center of the right needle, press the needle guard (R) to adjust the clearance between the needle and the looper at 0~0.05 mm.

  • Page 35: Adjusting The Feed Dog Height

    5) Adjusting the feed dog height When the feed dog is at the highest position, the feed dog face and the needle plate face are in parallel. Set the main feed dog① and the differential feed dog② at the same height, and adjust the distance from the needle plate face to the feed dog face at 1~1.2mm.

  • Page 36: Presser Foot Separation And Lift Volume

    7) Presser foot separation and lift volume Loosen the fixing screw② for the knee lift lever stopper① and the fixing screw④ for the presser bar collar③ and push the knee lift lever⑤ downward. Then the presser bar can be separated. To set the presser foot height, push down the knee lift lever⑤...

  • Page 37: Automatic Thread Trimmer

    Automatic Thread Trimmer 1) Operation Turn the power switch off before adjusting tension. Caution (1) Operation procedures for UT-B and UT-A device. Motor is selected either from ① or ②. Operation procedures for ① or ② are as follows. A. Put sewing materials under the presser foot and step on the pedal towards ①...
  • Page 38 Be sure to place sewing materials under the presser foot before operation. Caution (2) Operation procedures for ST-C device. Motor is selected either from ① or ②. Operation procedures for ① or ② are as follows. A. Put sewing materials under the presser foot and step on the pedal towards ①...

  • Page 39: Wiring

    2) Wiring (1) Limit switch A. Adjusting limit switch There is a detection switch which prevents the sewing machine from operating unless the trimmer is completely returned to the original position. a. Loosen screws ① and ②. b. When trimming blade returns to its original position, adjust so that the switch is turned on.
  • Page 40 (2) Connecting solenoid valve A. Fortuna Ⅲ servo motor a. For UT-B device ·Press solenoid valve buttons to check how each device moves. ·If the device does not work, check the cords. ·For the pneumatic solenoid valve carries polarity, check the connection between the cable and the connector.
  • Page 41 c. For ST-C device. ·Press solenoid valve buttons to check how each device moves. ·If the device does not work, check the cords. ·For the pneumatic solenoid valve carries polarity, check the connection between the cable and the connector. ·The device will not work if the cords are plugged in incorrectly to opposite power.
  • Page 42 B. Fortuna Ⅳ Compact Servo Motor a. For UT-B device. ·Press solenoid valve buttons to check how each device moves. ·If the device does not work, check the cords. ·For the pneumatic solenoid valve carries polarity, check the connection between the cable and the connector.
  • Page 43 c. For ST-C device. ·Press solenoid valve buttons to check how each device moves. ·If the device does not work, check the cords. ·For the pneumatic solenoid valve carries polarity, check the connection between the cable and the connector. ·The device will not work if the cords are plugged in incorrectly to opposite power.

  • Page 44: Air Pressure Wiring Map

    3) Air pressure wiring map (1) UT-B device 2.5×4×350mm 2.5×4×150mm 2.5×4×300mm 2.5×4×300mm 2.5×4×400mm solenoid valve air pressure : 0.35MPa~0.45MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 78 ]...
  • Page 45 (2) UT-A device 2.5×4×150mm 2.5×4×150mm 2.5×4×300mm 2.5×4×200mm 2.5×4×200mm 2.5×4×300mm solenoid valve air pressure : 0.35MPa~0.45MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 79 ]...
  • Page 46 (3) ST-C device 2.5×4×350mm 2.5×4×300mm 2.5×4×580mm 2.5×4×600mm 2.5×4×300mm solenoid valve air pressure : 0.35MPa~0.45MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 80 ]...

  • Page 47: Installation Of Synchronizer Sensor

    4) Installation of synchronizer sensor Leave the trimming cylinder plug pulled off from the control box in the motor. Otherwise, parts can be damaged. Warning ③ (1) Install the synchronizer ① on the machine and fasten screw ② lightly. (2) Turn on the motor switch (3) Press the pedal and form a few stitches (4) Press the pedal backward to stop the needle (5) Loosen the screw ②...

  • Page 48: Adjustment Of Automatic Thread Trimmer

    5) Adjustment of automatic thread trimmer Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (1) Adjusting thread trimming air cylinder A. The desirable stroke is 25mm. B. Adjust the sub guide shaft ① and the rod end bearing ②, and conduck setting as in the figure.
  • Page 49 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (4) Position of clamp spring and clamp spring pressure A. Loosen the screw ⑩. ⑭ B. Adjust so that the side of the clamp spring ⑪ and the ⑫...
  • Page 50 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (6) Position of fixed blade body The fixed blade body ⒃ simultaneously moves to the left with the moving fixed body ③ and stops after ③...
  • Page 51 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (7) Relation between moving blade and needle A. Unfasten the nut ⒗. ⒗ B. Bring the moveable blade ① to the far left. C.
  • Page 52 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (8) Position of moving blade point A. Position the moving blade ① to the left. B. When the distance between the endpoint (22) of the moving blade ①...
  • Page 53 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (9) Adjusting moving blade carrier guide (upper) The fixed blade body simultaneously moves to the left ③ with the moving blade body and stops as it touches the stopper for the fixed blade carrier.
  • Page 54 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (10) Relation between needle thread, looper thread and moving blade Check the following. A. Does the moving blade ① pass through the loops of (30) (29) needle threads (29) and (30)?

  • Page 55: Adjustment Of Thread Tension Release Mechanism

    6) Adjustment of thread tension release mechanism Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (1) Block for trimming switch guide. A. Loosen the screw ③. B. When the rod of the trimming cylinder is at the far left (when the trimming device is not working), adjust the block for trimming switch guide ①...
  • Page 56 (3) Thread pull-off lever A. Loosen the screw ⑩ of the tension release lever located on the backside of the machine. B. Lift the thread pull-off lever ⑨ to the top. ⑨ C. Tighten the screw ⑩ afterwards. ⑩ [ Figure 98 ] (4) Releasing looper thread When using an elastic thread like wooly as looper thread, the looper thread guides ①,②must be used.
  • Page 57 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (5) Tension disc separator ⑮ ⒃ 35mm ⒖ ⒗ (21) (22) ⑭ ⑬ ⒔ ⑫ ⒕ (23) [ Figure 100 ] A.
  • Page 58 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (6) Thread pull-off hook unit ⑮ ⒃ 35mm ⒖ ⒗ (21) (22) ⑭ ⑬ ⒔ ⑫ ⒕ (23) [ Figure 101 ] The thread pull-off hook unit “A”(22) is designed to control the needle thread in the sewing material to the minimum when sewing starts.

  • Page 59: Adjustment Of Air Wiper

    7) Adjustment of air wiper Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (1) Loosen the screw ③. (2) Move the air wiper ① front and back so that the air wiper ③...

  • Page 60: Presser Foot Lifter Mechanism

    8) Presser foot lifter mechanism Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (1) Unfasten the nut ②. (2) When the knee-lifting air cylinder rod ① is at the lowest point, turn the knuckle for knee-lifting air cylinder ③...

  • Page 61: St-C Device

    9) ST-C device (1) Position of movable trimming blade Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning A. Align the line ① of the upper shaft pulley with the carving ②...
  • Page 62 (2) Speed adjustment of trimming thread-moving blade A. The speed of the trimming thread-moving blade can be adjusted with a speed controller of the cylinder. Speed controller B. To reduce speed, loosen the nut of the speed controller and turn the screw clockwise and vice versa. [ Figure 108 ] (3) Clearance between movable trimming knife and fixed trimming knife Before adjustments, always turn off...
  • Page 63 Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. Warning (4) Pressure of thread clamp spring The pressure of the thread clamp spring should be kept to a minimum as long as the thread can be caught ⑭...

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