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故障现象与原因、处理对策

/TROUBLES AND CORRECTIVE MEASURES 

 
 

   

 

   

 

 

 

 

 

 

1

.上线断线

 

1

 

平行部张力过强;

 

2

 

挑线弹簧的强度过强,移动量过大;

3

 

旋梭尖部分有毛刺,有伤痕;

 

4

 

旋梭的同步时间不对;

 

5

 

线道上有伤痕;

 

6

 

机针安装不良;

 

7

 

机针过细;

 

8

 

机针的前端有伤痕;

 

○减弱平行部张力;

 

○减弱挑线弹簧的弹力,或缩小移

动量;

 

○锉平旋梭尖的毛刺,或更换旋梭;

 

○用高度尺调整旋梭的同步时间;

 

○用布或锉刀去除伤痕和毛刺;

 

○调整机针的朝向和高度;

 

○更换成粗机针;

 

○更换机针;

 

 

24 

 

 

19 

 

14 

14 

14

 

2

.上线脱线

 

1

 

上线切刀张开过早;

 

2

 

始缝部线勾不到一起(始缝的张力

过强)

 

3

 

上线穿线方法不对;

 

4

 

始缝的速度过快;

 

○推迟上线切刀张开时间;

 

○减弱始缝张力;

 

 

○重新正确地穿线;

 

○设定软起动;

 

 

 

 

15 

 

3

.平行部缝迹不均匀

 

1

 

平行部线张力过弱;

 

2

 

底线张力过强;

 

3

 

钮扣整体张力过弱;

 

○磳强平行部线张力;

 

○减弱底线张力;

 

○增强上夹线器张力;

 

 

 

 

4

.始缝缝迹不均匀

 

1

 

平行部张力过弱;

 

2

 

上线切刀位置过高;

 

 

3

 

挑线弹簧的移动量过大;

 

○加强平行部张力;

 

○不碰到压脚的前提下尽量下降压

脚;

 

○减小挑线弹簧的移动量;

 

 

21 

 

24 

5

.加固缝部上线从布

的下面露出,成圈状

 

1

 

加固缝线张力过弱;

 

2

 

底线张力过强;

 

3

 

缝放射状的图案时放射针数过多;

4

 

结束缝的张力过弱;

 

○增强加固缝线张力;

 

○减弱底线张力;

 

○减少放射针数;

 

○增强结束缝线张力;

 

 

 

 

 

6

.缝迹鼓起

 

1

 

底线张力过弱;

 

2

 

底线从梭壳中脱出来;

 

○增强底线张力;

 

○重新正确地穿梭壳线;

 

○底线卷绕量绕得不要过多;

 

16 

15 

 

7

.锁眼绽出

 

1

 

钮扣孔比压脚小;

 

2

 

缝制薄料时皱缩;

 

 

3

 

机针安装不好;

 

4

 

机针弯曲;

 

5

 

旋梭尖部有毛刺或伤痕;

 

○把压脚更换成更小的;

 

○推迟机针和旋梭的同步时间(把

针杆下降

0.5mm

左右)

 

○重新调整机针的朝向、高度等;

 

○更换机针;

 

○用锉刀锉平梭尖或更换旋梭;

 

 

19 

 

14 

14 

 

8

.线绽开

 

1

 

固定缝针数少;

 

2

 

固定缝宽度过宽;

 

○增加缝制结束时加固缝的针数;

 

○减小缝制结束时的加固缝宽度;

 

 

 

9

.缝制结束上线留线

过长

 

1

 

固定缝宽度过窄;

 

2

 

固定缝张力过弱;

 

○增加缝制结束时的加固缝针数;

 

○减小缝制结束时的加固缝宽度;

 

 

 

10

.始缝时上线断线,

或者背面线迹不好;

 

1

.始缝张力过弱;

 

○增强始缝张力;

 

 

 
 

26

Summary of Contents for 5780BS

Page 1: ...5780A Z 91 172348 95 00 HIGH SPEED COMPUTER CONTROLLED LOCKSTICH STRAIGHT BUTTON HOLING SEWING MACHINE OPERTION MANUAL PARTS BOOK 10051884...

Page 2: ...turn the power switch ON after setting the sewing machine to the bed base properly II SPECIFICATIONS 1 Subclass 5780B 5780BSerise Computer controlled high speed lockstich Straight Button holing Indus...

Page 3: ...d Setting Max 17mm Reverse pressure lifting foot Winding Build in Type winding at machine running Cloth feeding Driving Device Pulse Motor Swing Needle Driving Pulse Motor Knife Driving Device Pulse M...

Page 4: ...3 Standard sewing shape list 3...

Page 5: ...3 Standard sewing shape list 4...

Page 6: ...4 5780B ON OFF Power ON OFF switch 5780B Machine head 5780B Series Operation panel Control box Presser lifting pedal and start pedal Thread stand device 5...

Page 7: ...ely fix the respective power cables of power switch 3 Pass four bed base fixed screws 10 through bed base 4 Set rubber cushions 5 to holes 6 and then fix on the base 5 Fix head support bar on table 6...

Page 8: ...V Connecting single phase 220V CAUTION To prevent possible accidents caused by the tail of the sewing machine perform the work by two personal or more when the machine is moved CAUTION Place hinge pla...

Page 9: ...ents caused by abrupt start of the machine turn OFF the power to the machine before starting the work When tilting the sewing machine head tilt quietly the sewing machine until head supper bar comes i...

Page 10: ...late onto bed base with setscrew JP7 After open the machine cover connecting safety switch connector with connect located on the PCB which is on the back of the machine CAUTION Fixes the sewing machin...

Page 11: ...Slowly tilting the sewing machine check that the cords are not forcibly pulled CAUTION When you tilt the sewing machine make sure that the sewing machine head support bar is placed on the table Instal...

Page 12: ...install and use eye protection cover and use the sewing machine 10 Fixing the temporary stop switch A B The temporary stop switch has been in the state as shown in figure A at the time of delivery Lo...

Page 13: ...that two side holes in the thread guide rod face the thread guide 1 2 3 1 Assemble the thread stand and set it in the hole in the top right corner of the machine table 2 Tighten locknut to fix the th...

Page 14: ...cation for the sewing hook Adjust the amount of oil supplied to the sewing hook by loosening lock nut and turning of amount adjustingscrew Amount of supplied oil is reduced when turning the screw cloc...

Page 15: ...work after tuning the power off and ascertaining that the motor is at rest 1 Hold needle with its recessed part facing toward the operator side A 2 Insert the needle fully into the needle champing hol...

Page 16: ...e threading method according to the thread to be used 4 Threading the bobbin case 1 2 3 Rotating direction of bobbin and threading 1 Fit the bobbin so that it rotates in the direction of the arrow 2 P...

Page 17: ...n extent that bobbin case barely comes down when holding thread end coming from bobbin case and shaking it somewhat strongly Turning tension adjust screw clockwise will increase bobbin thread tension...

Page 18: ...the bobbin case into the hook so that it is supported by the hook shaft and then snap in the latch lever Press the bobbin case until the predetermined position is reached and it will click 1 2 CAUTIO...

Page 19: ...retaining screw 2 Adjust so that the knife when lowered the knife bar by hand is spaced to 2 mm away from the top surface of the throat plate as illustrated in the sketch Then be sure to place the wa...

Page 20: ...V 1 1 1 2 1 3 2 1 2 2 3 4 0 05mm 3 0 0 2mm 19...

Page 21: ...bar connection screw and adjust the height of the needle bar 2 Set the needle to hook relation in the following way Rotate the hand pulley in the correct direction until the needle starts to go up fr...

Page 22: ...bend the top end of thread presser spring so that it comes in contact with thread trimming blade of upper knife over the length with no clearance and so that the needle thread trimmer securely holds t...

Page 23: ...t of the machine be sure to start the following work after turning the power off and ascertaining that the motor is at rest To adjust the pressure applied by the presser bar to fabric turn presser spr...

Page 24: ...he machine be sure to start the following work after turning the power off and ascertaining that the motor is at rest 8 15mm Loosen nut and adjust the position with stopper spring so that the distance...

Page 25: ...it clockwise will increase the pressure of the thread take up spring Turning it counterclockwise will decrease the pressure 2 Adjusting the thread take up amount of the thread take up lever The thread...

Page 26: ...wing work after turning the power off and ascertaining that the motor is at rest 1 2 3 Clean filter of the fan located on the bottom surface of the machine table bed base once every week 1 Pull the sc...

Page 27: ...TROUBLES AND CORRECTIVE MEASURES 1 1 2 3 4 5 6 7 8 24 19 14 14 14 2 1 2 3 4 15 3 1 2 3 4 1 2 3 21 24 5 1 2 3 4 6 1 2 16 15 7 1 2 3 4 5 0 5mm 19 14 14 8 1 2 9 1 2 10 1 26...

Page 28: ...Thread tension at parallel section is too low 2 Bobbin thread tension is too high 3 Pre tension is too low Increase the thread tension at parallel section Decrease bobbin thread tension increase pre...

Page 29: ...ing is too small 2 Width of tie stitching is too wide Increase the number of stitches of tie stitching at the end of sewing Narrow the width of tie stitching at the end of sewing 9 Length of needle th...

Page 30: ...ENTS 07 4 HOOK DRIVING SHAFT COMPONENTS 10 5 PRESSER FEED COMPONENTS 12 6 NEEDLE BAR ROCKING COMPONENTS 15 7 NEEDLE THREAD TRIMMER COMPONENTS 17 8 BOBBIN THREAD TRIMMER COMPONENTS 20 9 CLOTH CUTTING K...

Page 31: ...1...

Page 32: ...419 TAKE UP THREAD GUIDE A 1 23 10003396 SCREW M5 L 8 2 24 10003423 TAKE UP THREAD GUIDE B 1 25 10003873 NEEDLE BAR THREAD GUIDE 1 26 10008936 SAFETY LABEL 12 1 27 10003353 CLOTH PLATE WASHER 1 28 100...

Page 33: ...6 8 54 10003888 SAFETY SWITCH COVER 1 55 10003395 WASHER 6 1X18 5X2 4 56 10003453 OIL SHIELD 1 57 10003415 II RUBBER A 2 58 10003829 CUSHION 1 59 10003415 I RUBBER 1 60 10003451 Z STOPPER RUBBER 1 61...

Page 34: ...4...

Page 35: ...10000766 ASSY_THREAD_TENSION_POST 1 24 10000741 GUIDE PLATE 1 25 10000752 BUSHING 1 26 10000758 THREAD BREAK DETECTOR A 1 27 10039319 ASSY_BOBBIN_THREAD_WINDER 1 28 10011096 BOBBIN FITTING BASIS COMP...

Page 36: ...ENSION SPRING 1 49 10004393 BOBBIN WINDER TENSION DISC 2 50 10003089 BOBBIN THREAD TENSION ROD ASM 1 51 10004507 NUT 11 64 40 1 52 10011149 THREAD CUTTER 1 53 10000164 SCREW 1 8 44 L 2 9 2 54 10000733...

Page 37: ...7...

Page 38: ...1 22 10000841 MAIN_SHAFT 1 23 10000831 SCREW M8 L 16 1 24 10000860 SCREW M5 L 20 4 25 10012162 SCREW M5 L 5 2 26 10012062 SCREW 11 64 40 L 6 2 27 10011232 SCREW M6 L 6 6 28 10000314 SCREW M6 L 8 6 29...

Page 39: ...47 10009074 SCREW M4 L 4 2 48 10052927 NEEDLE CONNECTING ROD ASSEMBLY 1 9...

Page 40: ...10...

Page 41: ...SPROCKET WASHER 1 13 10033423 HOOK COMPL 1 14 10000775 CROWN KNOB 1 15 10011232 SCREW M6 L 6 12 16 10000883 FELT 1 17 10000893 BEARING SUPPORT 1 18 10000900 SPROCKET_B 1 19 10000774 SPROCKET_C 1 20 10...

Page 42: ...12...

Page 43: ...8 2 22 10000342 SCREW M4 L 10 6 23 10003402 SCREW M6 L 10 3 24 10010735 SCREW M6 L 18 1 25 10012162 SCREW M5 L 5 5 26 10011232 SCREW M6 L 6 2 27 10000001 TIMING_BELT 1 28 10000019 SCREW M4 L 5 4 29 2...

Page 44: ...ORK_CLAMP_ARM 1 59 10000065 PBL_WORK_CLAMP_ARM_SHAFT 1 60 10009074 SCREW 1 61 10012553 SCREW M4 L 8 1 62 10009103 SCREW M4 L 16 1 63 10000943 SCREW M5 L 8 2 64 10005490 SCREW M5 L 10 4 65 10005139 SCR...

Page 45: ...15...

Page 46: ...CREW M6 L 6 2 16 10052931 NEEDLE BAR FRAME ASSY 1 17 10000982 NEEDLE BAR METAL 2 18 10052929 NEEDLE BAR FRAME 1 19 10052930 BALANCE SHAFT 1 20 10053753 PIN 1 21 10005326 NEEDLE BAR CONNECTION SLIDE 1...

Page 47: ...17...

Page 48: ...SHOULDER SCREW D8 H15 3 24 10002767 SPRING 1 25 10002760 THRUST COLLAR D8 W9 1 26 10002469 A UTT ARM A 1 27 10002766 B UTT ARM A 1 28 10003263 UTT BASE PLATE 1 29 10000021 UTT CAM ROLLER 2 30 10002803...

Page 49: ...N SUPPORT LEVER SPRING 1 55 10002450 ASSY UTT TRIMMER 1 56 10003248 E RING 3 1 57 10000994 NUT M5 1 58 10003399 SCREW M4 L 8 1 59 10002762 SCREW M4 L 6 1 60 10003396 SCREW M5 L 8 1 61 10003261 UTT GUI...

Page 50: ...20...

Page 51: ...001124 STOPPER_PIN 1 22 10000021 UTT_CAM_ROLLER 2 23 10000919 UTT_CAM_ROLLER_SHAFT 2 24 10001023 SHOULDER SCREW D8 H2 9 1 25 10010554 SCREW M3 L 6 2 26 10025945 THROAT_PLATE_BASE_COMPL 1 27 10003487 P...

Page 52: ...09104 SCREW M4 L 10 2 59 10010554 SCREW M4 L 6 1 60 10001025 SCREW M4 L 12 1 61 10001010 SCREW M5 L 8 3 62 10001125 SHOULDER SCREW D8 H2 9 4 63 10000918 SPRING 1 64 10001020 SAFETY SWITCH PRESSING PLA...

Page 53: ...23...

Page 54: ...HAFT GUIDE POST 1 13 10000863 SCREW M4 L 12 1 14 10002760 SHRINK RING 1 15 10012162 SCREW M 5 L 5 2 16 10001185 KNIFE BAR BUSH 1 17 10001169 KNIFE BAR 1 18 10001181 KNIFE BAR LOWER BUSHING 1 19 100519...

Page 55: ...25...

Page 56: ..._PLATE 1 23 10001338 SAFETY_PLATE_FITTING_BASE 2 24 10011636 SAFETY PLATE 1 25 10001339 SAFETY PLATE INSTALLING PLATE 1 26 10011678 SAFETY PLATE RETURN SPRING 1 27 10002880 SPRING PIN 2X6 2 28 1001157...

Page 57: ...27...

Page 58: ...28...

Page 59: ...TER PLATE 1 6 10008323 SCREW 2 7 10053755 OPERATION BOX 1 8 10048837 L725 L725 CABLE 1 9 10048838 L724 1 L724 1 CABLE 1 10 10025146 L524 1 L524 1 CABLE 1 11 10049550 L437 L437 DISCONNECTION DETECTION...

Page 60: ...093 25 4mm 10001192 5 35 10006179 5 70 10028680 5 100 10028685 K 10051479 S K L 10004529 10040941 10007119 10000074 10040936 10000074 10000020 10042066 10007084 10000944 10000944 10007086 10000942 100...

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