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CONTENTS

SPECIFICATIONS .........................................................................................................1

Ⅱ

. CONFIGURATION OF THE MACHINE COMPONENTS ..............................................2

Ⅲ

. INSTALLATION ......................................................................................................................3

1. Installing the machine head onto the table ................................................................................ 3

2. Selecting the motor pulley and the belt....................................................................................... 7

3. Installing the motor ....................................................................................................................... 7

4. Setting the belt ............................................................................................................................... 7

5. Installing the belt cover................................................................................................................. 8

6. Installing the chain ........................................................................................................................ 8

7. Installing the thread guide ............................................................................................................ 8

8. Installing the needle bar thread take-up cover ........................................................................... 9

Ⅳ

. LUBRICATION AND OILING ........................................................................................9

1. Lubricating oil ................................................................................................................................ 9

2. Oiling............................................................................................................................................. 10

3. Silicon oil lubricating unit ........................................................................................................... 10

Ⅴ

. OPERATION ................................................................................................................11

1. Needle ........................................................................................................................................... 11

2. Attaching the needle ................................................................................................................... 11

3. Threading the machine head ...................................................................................................... 12

4. Adjusting the stitch length ......................................................................................................... 13

5. Adjusting the differential feed ratio ........................................................................................... 13

6. Adjusting the presser foot pressure ..................................................................................................14

7. Adjusting the thread tension ...................................................................................................... 14

Ⅵ

. ADJUSTING THE SEWING MACHINE ......................................................................................15

1. Adjusting the silicon container thread guide............................................................................ 15

2. Adjusting the needle bar thread take-up thread receiver ........................................................ 15

3. Adjusting the rocking thread take-up ........................................................................................ 16

4. Adjusting the spreader thread guide ......................................................................................... 16

5. Adjusting the looper thread cam................................................................................................ 16

6. Adjusting the looper thread cam eyelet .................................................................................... 17

7. Adjusting the looper .................................................................................................................... 17

8. Adjusting the height of the needle ............................................................................................. 18

9. Adjusting the rear needle guard................................................................................................. 18

10. Relation between the rocking thread take-up timing and the needle thread loop ................ 19

(1) Adjustment by means of the crank ............................................................................................. 19

(2) Adjustment by the eccentric cam................................................................................................ 19

11. Adjusting the height of the feed dog ......................................................................................... 20

12. Installing position of the spreader ............................................................................................. 20

13. Adjusting the spreader thread guide and the needle clamp thread guide............................. 21

14. Adjusting the front needle guard ............................................................................................... 21

15. Adjusting the presser foot lift ......................................................................................................22

16. Adjusting the micro-lifter ............................................................................................................ 22

17. Adjusting the feed locus ............................................................................................................. 23

(1) Changing the feed driving movement......................................................................................... 23

(2) Changing the feed rock movement ............................................................................................ 24

(3) Restoring to the standard adjustment ........................................................................................ 24

18. Adjustment value of balloon ...................................................................................................... 25

19. Adjustment of the feed dog in longitudinal direction ............................................................. 27

(1) Longitudinal position of the feed dog.......................................................................................... 27

(2) For C11 ....................................................................................................................................... 28

Ⅶ

. MAINTENANCE ...................................................................................................................29

1. Cleaning the sewing machine ................................................................................................... 29

2. Replacing the lubricating oil...................................................................................................... 29

3. Inspecing and replacing the oil filter

........................................................................................ 29

Содержание MF-7500 Series

Страница 1: ...i ENGLISH INSTRUCTION MANUAL MF 7500...

Страница 2: ...usting the spreader thread guide 16 5 Adjusting the looper thread cam 16 6 Adjusting the looper thread cam eyelet 17 7 Adjusting the looper 17 8 Adjusting the height of the needle 18 9 Adjusting the r...

Страница 3: ...sted up to 4 4 mm Needle UY128GAS 9S to 12S standard 10S Needle bar stroke 31mm or 33 mm when changing over the eccentric pin Dimensions Height 451 x Width 515 x Length 263 Weight 46kg Lift of presser...

Страница 4: ...Needle tip silicon oil lubricating unit Oil hole cap Differential lock nut Micro lifter Micro adjustment knob Needle thread silicon oil lubricating unit Finger guard Thread guide No 1 Rocking thread...

Страница 5: ...r into the receptacle until all works have been completed There is a danger of injury by being caught in the machine WARNING The weight of the sewing machine is more than 46 kg Be sure to perform the...

Страница 6: ...1 13155403 Dust proof rubber Black 3 Installing the rubber cushion Install the gray dust proof rubber to section A only For the V belt type Part No Part name Q ty 40072505 Dust proof rubber Gray 2 13...

Страница 7: ...ace depth 20 Drill a hole at the time of set up B 4x10 5 hole depth 26 spot facing depth 3 5 C 2x 3 4 on the bottom surface depth 10 Drill a hole at the time of set up D Drilled hole 17 E Installing p...

Страница 8: ...bottom surface depth 20 Drill a hole at the time of set up B 4 x10 5 hole depth 26 spot facing depth 3 5 C 2 x 3 4 on the bottom surface depth 10 Drill a hole at the time of set up D Drilled hole 17...

Страница 9: ...5 5 mm 10 mm M type V belt Use a clutch motor of 3 phase 2 pole 400 W 1 2HP Use the M type V belt 1 The motor pulley shifts to the left hand side when de pressing the pedal At this time install the mo...

Страница 10: ...in the machine or a danger of damage of the machine since sewing products may be caught in the machine 1 Hang hook of chain to presser bar lifting lever 2 Hook the other side of the chain to the peda...

Страница 11: ...r marker lines on oil gauge Checking before using the sewing machine 1 Check oil gauge and make sure that lubricating oil level is between the upper and lower two lines When lubricating oil level lowe...

Страница 12: ...icient there supply it dimethyl silicon When silicon oil adhered to the components other than the silicon oil lubricating unit be sure to wipe it out If the components to which silicon oil adhered are...

Страница 13: ...G To protect against possible personal injury due to abrupt start of the machine be sure to start the follow ing work after turning the power off and ascertaining that the motor is at rest 1 Loosen se...

Страница 14: ...gular stitches will be caused So be careful 3 Threading the machine head When using more stretchable thread When covering thread is excessively loosened B When covering thread is excessively loosened...

Страница 15: ...d and fix it with screw Use the machine within the range where feed dogs or feed dog and throat plate do not come in contact with each oth er Loosen differential lock nut and move lever up to increase...

Страница 16: ...nut Turning it clockwise to increase the pressure Turning it counterclockwise to decrease the pressure 6 Adjusting the presser foot pressure 7 Adjusting the thread tension Adjust the thread tension wi...

Страница 17: ...Loosen setscrews and adjust so that the heights of the respective needle thread guide rods are the dimensions as shown in the illustration Then tight en screws to fix the thread guide rods A B C 29mm...

Страница 18: ...ainst possible personal injury due to abrupt start of the machine be sure to start the follow ing work after turning the power off and ascertaining that the motor is at rest Adjust so that the top end...

Страница 19: ...power off and ascertaining that the motor is at rest Lateral position The relation between clearance A between looper and the center of right hand needle and the needle gauge is as shown in the table...

Страница 20: ...tion 2 Make rear needle guard slightly come in contact with the right hand needle so that the clearance between right hand needle and top end of the looper is 0 to 0 05 mm when top end of the looper c...

Страница 21: ...elivery Engraved marker line on rocking thread take up shaft aligns with the edge of crank Size of needle thread loop 1 When screw is loosened the rocking thread take up rotates due to the light weigh...

Страница 22: ...the spreader WARNING To protect against possible personal injury due to abrupt start of the machine be sure to start the follow ing work after turning the power off and ascertaining that the motor is...

Страница 23: ...the center of thread hole of needle clamp thread guide aligns with center C of slot A when the needle is in the lowest position At this time adjust so that the clearance between nee dle clamp thread g...

Страница 24: ...t the motor is at rest When the micro lifter collar is turned clockwise and counterclockwise the presser bar lifting lever is pressed down to lift the presser foot Adjust the height of the micro lifte...

Страница 25: ...d driving eccentric cam with eccentric cam setscrews No 1 and No 2 while pressing the cam in the opposite direction to its normal movement Check to be sure that the positioning cam is in contact with...

Страница 26: ...o be sure that the pin is in contact with the feed rock eccentric cam section E so as to prevent the screws from loosening Move to the left E Timing of the feed rock eccentric cam can be retarded from...

Страница 27: ...thread comes off from the highest point of looper thread cam when the top end of left needle is aligned with the underside of looper while the needles are coming down Then tighten setscrews Looper thr...

Страница 28: ...hread receiver The needle bar thread take up thread receiver aligns with the top end of the needle bar thread take up when the needle bar is in its lower dead point D claw standard B claw Differential...

Страница 29: ...feed lever slips greatly out of position abnormal noise or abrasion will be caused 2 Position of the differential feed dog It is the standard that the position where the clearance provided between mai...

Страница 30: ...of 3 6 mm the clearance between the most advanced posi tion of feed worker side and the throat plate shall be 0 6 0 2 mm 2 When the differential feed dog has a pitch of 2 5 mm and the differential fee...

Страница 31: ...e sure to start the follow ing work after turning the power off and ascertaining that the motor is at rest 3 Inspecing and replacing the oil filter WARNING To protect against possible personal injury...

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