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SunStar SC 7200A Series User Manual

Super high-speed cylinder bed interlock machine
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S S U U N N S S T T A A R R M M A A C C H H I I N N E E R R Y Y C C O O . . , , L L T T D D . .
R
User's
Manual
SC 7200A Series
SC 7300A Series
Super High-Speed
Cylinder Bed Interlock
Machine
1) For proper use of the machine,
thoroughly read this manual before use.
2) Keep this manual in a safe place for
future reference in case the machine
breaks down.
M M M M E E - - 0 0 4 4 1 1 2 2 0 0 1 1

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Summary of Contents for SunStar SC 7200A Series

  • Page 1 User’s Manual SC 7200A Series SC 7300A Series Super High-Speed Cylinder Bed Interlock Machine 1) For proper use of the machine, thoroughly read this manual before use. 2) Keep this manual in a safe place for future reference in case 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 Symbol of Series Cylinder Bed-3Needle SUNSTAR Cylinder Bed-2Needle Chain Stitch M/C Main Motor Fortuna Ⅳ Fortuna Ⅲ Clutch Motor Top Cover Thread Without Top Cover Thread Needle Distance With Top Cover Thread 3.2mm...

  • 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 SC 7300A 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 ⑦ ⑤ ⑥ ⑧ ⒕ ④ ⑨ ⒖ ① ⑮ ⑩ ⒗ ⑭ ③ ⑪ ⑬ ⒃ (21) ② ⑫ ① Arm ⑩ Oil gauge ② Bed ⑪ Differential feed regulating screw ③ Oil pan ⑫...

  • Page 10: Specifications

    Specifications Model SC 7300A Series Description Super high-speed cylinder bed, 3-needle, interlock stitch machine Stitch Type ISO 406,407,602,605 For use General seaming of knitted materials Sewing speed Max. 6000 s.p.m (In the case of on-and-off operation) 1.4~3.6mm Stitch length Stitches per inch: 7-18; The number of stitches per 30mm: 8-21 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 Machine ⑤ Oilpan ⑤ ① ⑤ ① ⑤ 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) Machine ⑤ Oilpan ① ⑤ 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 [ Warning ] ① Be sure to turn the power switch off before adjusting belt tension. 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

    Be sure to turn the power switch off before oiling 1) Lubricating oil Use industrial-purpose lubricating oil supplied by SunStar or SF oil by YANASE for this particular type of sewing machine. [ Caution ] 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. [ Caution ] 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 [ Warning ] 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 31 ] [ Figure 32 ] Press lightly stitch length-adjusting button① with your left hand so that the end comes in contact with inner parts. With the button① pushed in, turn the upper shaft pulley② with your right hand so that the button① goes in deeper. At this point, rotate the upper shaft pulley with the button①...

  • Page 25: Adjustment Of Differential Feed

    8) Adjustment of differential feed [ Caution ] Be sure to turn the power switch off before adjusting differential feed. ④ ① ② ③ [ Figure 33 ] [ Figure 34 ] ⑴ Differential feed Set normal differential feed or reverse differential feed by rotating differential feed regulating handle①. As differential feed is driven independently from main feed, changes in main feed (stitch length) will result in differential ratio.

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

    9) Lubricating device of needle thread and needle cooling device [ Warning ] Be sure to turn the power switch off before work. ② ① [ Figure 35 ] [ Figure 36 ] 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 [ Warning ] Turn the power switch off before adjusting tension. 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: Adjustment Of Looper Thread Tension

    2) Adjustment of looper thread tension [ Warning ] Be sure to turn the power switch off before adjusting tension. The looper guides②, ③ are located in the standard position when the center of the thread hole of the looper thread guide meets the line①...
  • Page 29 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 30: 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 46 ] ※ Use Timing Gauge Timing Gauge is marked with such scales as A, B, C, D and E depending on needle distance.
  • Page 31 ⑵ Needle height 0.5~1.0mm ① [ Figure 47 ] [ Figure 48 ] 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 32 ※ Front/rear position of needle guard(R) ③ ② 0~0.05mm 0~0.05mm [ Figure 51 ] [ Figure 52 ] 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 33: Automatic Thread Trimmer

    Automatic Thread Trimmer 1) Operation [ Note ] Be sure to lay sewing materials under the presser foot before operation. (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.
  • Page 34 [ Note ] Be sure to place sewing materials under the presser foot before operation. (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 35: Wiring

    2) Wiring (1) Limit switch A. Adjusting limit switch a. Loosen screws ① and ②. b. When trimming blade returns to its original position, adjust so that the switch is turned on. c. Fix screws ① and ②. ① ② [ Figure 58 ] B.
  • Page 36 (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 37 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 38 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 39 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 40: 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 2.5×4×400mm 2.5×4×300mm solenoid valve air pressure : 0.4MPa~0.5MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 67 ]...
  • Page 41 (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 : 0.4MPa~0.5MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 68 ]...
  • Page 42 (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 : 0.4MPa~0.5MPa (4Kgf/cm ~5Kgf/cm 4×6×1,500mm [ Figure 69 ]...

  • Page 43: Installation Of Synchronizer Sensor

    4) Installation of synchronizer sensor [ Warning ] Leave the trimming cylinder plug pulled off from the control box in the motor. Otherwise, parts can be damaged. 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...

  • Page 44: Adjustment Of Automatic Thread Trimmer

    5) Adjustment of automatic thread trimmer [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (1) Adjusting thread trimming air cylinder A. The desirable stroke is 15mm. B.
  • Page 45 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (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 46 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (6) Position of fixed blade body The fixed blade body ⒃ simultaneously moves to the ③ left with the moving fixed body ③ and stops after contacting the stopper for fixed blade body ⒔.
  • Page 47 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (7) Relation between moving blade and needle A. Unfasten the nut ⒗. ⒗ (21) ⒗ B. Bring the moveable blade ① to the far left. C.
  • Page 48 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (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 49 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (9) Adjusting moving blade carrier guide (lower) ① 0.05mm~ 0.1mm (25) (26) [ Figure 82 ] [ Figure 83 ] The optimal clearance between the moving blade ①...
  • Page 50 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (11) 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 51: Adjustment Of Thread Tension Release Mechanism

    6) Adjustment of thread tension release mechanism [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (1) Block for trimming switch guide. A. Loosen the screw ③. B.
  • Page 52 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (4) Tension disc separator ⑮ ⒃ 35mm ⒖ ⒗ (21) (22) ⑭ ⑬ ⒔ ⑫ ⒕ (23) [ Figure 90 ] A.
  • Page 53 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (5) Thread pull-off hook unit ⑮ ⒃ 35mm ⒖ ⒗ (21) (22) ⑭ ⑬ ⒔ ⑫ ⒕ (23) [ Figure 91 ] The thread pull-off hook unit “A”(22) is designed to control the needle thread in the sewing material to the...

  • Page 54: Adjustment Of Air Wiper

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

  • Page 55: Presser Foot Lifter Mechanism

    8) Presser foot lifter mechanism [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (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 56: St-C Device

    9) ST-C device (1) Position of movable trimming blade [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. A. Align the line ① of the upper shaft pulley with the carving ②...
  • Page 57 (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 98 ] (3) Clearance between movable trimming knife and fixed trimming knife [ Warning ]...
  • Page 58 [ Warning ] Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode. (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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Sc 7300a series

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