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CONTENTS

1. NEEDLES & THREADING THE MACHINE

1-1 Needles

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1-2 Replacing the needle

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1-3 Threading the machine

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2. MACHINE SPEED

2-1 Machine speed & direction in which the machine

pulley runs

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2-2 Motor & belt

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3. LUBRICATION

3-1 Oil

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3-2 Oiling

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3-3 Replacing the oil and the oil element

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4. SEWING MACHINE INSTALLATION

4-1 Cutting the machine table

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4-2 Installing the machine

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5. TIMING OF THE LOOPER TO THE NEEDLES

5-1 Angle and height for installing the looper

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5-2 Looper left-to-right movement

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5-3 Looper setting distance

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5-4 Needle height

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5-5 Needle/looper front-to-back relationship

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5-6 Changing the looper orbit

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5-7 Changing the amount of the looper front-to-back

movement

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6. FRONT AND REAR NEEDLE GUARDS

6-1 Position of the needle guard (rear)

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6-2 Position of the needle guard (front)

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7. SPREADER

7-1 Position of the spreader

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7-2 Position of the spreader thread guide

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7-3 Timing of the spreader

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8. FEED DOGS & STITCH LENGTH

8-1 Feed dog height & tilt

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8-2 Stitch length

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8-3 Differential feed

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9. PRESSER FOOT

9-1 Presser foot pressure

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9-2 Position of the presser foot & foot lift

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10. STITCH FORMATION

10-1 Position of the needle thread guides

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10-2 Position of the thread guide on the needle

thread take-up

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10-3 Timing of the needle thread take-up

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10-4 Position of the needle thread guard

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10-5 Position of the thread guide of the spreader

thread take-up

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10-6 Position of the thread guide of the looper thread

take-up

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10-7 Position of the looper thread take-up

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11. REPLACING THE TIMING BELT

11-1 Marks on the timing belts

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11-2 To remove the timing belt

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11-3 To place the timing belt

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12. CLEANING THE MACHINE

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Содержание MZ Series

Страница 1: ...INSTRUCTION Industrial Sewing Machines First published May 1997 No 970049 ...

Страница 2: ...starting the machine check to make sure the pulley cover safety cover etc are secured 3 Before adjusting cleaning threading the machine or replacing the needle be sure to turn off the power 4 Never start the machine with no oil in the reservoir 5 Refer to the parts list as well as this instruction manual before maintenance If the machine includes a thread trimmer read and study the instruction man...

Страница 3: ...DS 6 1 Position of the needle guard rear 10 6 2 Position of the needle guard front 11 7 SPREADER 7 1 Position of the spreader 12 7 2 Position of the spreader thread guide 12 7 3 Timing of the spreader 13 8 FEED DOGS STITCH LENGTH 8 1 Feed dog height tilt 13 8 2 Stitch length 14 8 3 Differential feed 14 9 PRESSER FOOT 9 1 Presser foot pressure 15 9 2 Position of the presser foot foot lift 15 10 STI...

Страница 4: ...lacing the needle 2 Replacing the needle To replace the needle check the needle carefully to see that the scarf is turned to the rear of the machine see the illustration Then install the needle correctly 1 1 1 1 3 Threading the machine 3 Threading the machine 3 Threading the machine 3 Threading the machine Thread the machine correctly by referring to the illustration below Threading the machine in...

Страница 5: ...achine pulley turns clockwise as the handwheel does as seen from the machine pulley 2 2 2 2 2 Motor belt 2 Motor belt 2 Motor belt 2 Motor belt Motor 3 phase 2 pole 400W clutch motor Belt M type V belt Select the proper motor pulley according to the machine speed refer to the motor pulley outer diameter on the table below Adjust where to position the motor by pressing the finger onto the middle of...

Страница 6: ... 3 Replacing the oil and the oil element placing the oil and the oil element placing the oil and the oil element placing the oil and the oil element To extend machine life be sure to replace the oil after the first 250 hours of operation To replace the oil follow the procedures below 1 Remove the V belt from the motor pulley and then remove the machine from the table 2 Remove screw D and then drai...

Страница 7: ...G MACHINE INSTALLATION 4 4 4 4 1 Cutting the machine table 1 Cutting the machine table 1 Cutting the machine table 1 Cutting the machine table Hole A shown below is for installing the electric presser foot lift ...

Страница 8: ...rectly by referring to the illustration Install the bolts and nuts to the machine table Fit the rubber cushions onto the bolts Then mount the machine properly onto the rubber cushions Semi submerged installation Install the machine correctly by referring to the illustration Secure the oil reservoir installation brackets to the machine table with screws Fit the rubber cushions onto the screws Then ...

Страница 9: ...proximately 0 2mm above the top of the left needle s eye when the looper moves to the right on the front side of the needles see the illustration below To adjust the timing of the looper to the needles remove the machine cover loosen screws A on the timing pulley upper and shift the timing pulley upper by turning the handwheel while holding the timing pulley upper by hand 5 5 5 5 3 Looper setting ...

Страница 10: ... and the point of the looper at approximately 0 2 0 3mm Then the looper should barely touch the right needle On 3 needle machines the clearance between point A of the looper and left needle C should be 0 2 0 3mm To make this adjustment loosen screw D on the looper holder first Then adjust the needle guard rear so that it presses right needle B slightly to the front With the needle guard rear and n...

Страница 11: ...ight increases Then the point of the looper touches the right needle Skip stitching may occur when the looper moves to the right A thread chain is not produced smoothly When the timing mark is at point D The clearance between the point of the looper and the left needle increases Skip stitching may occur when the looper moves to the left The needle extremely touches the back of the looper causing n...

Страница 12: ...e 3 3 5mm The amount of the looper front to back movement is factory set properly for needle count 11 Nm75 If you use needle counts Nm80 90 adjust the amount as required Remove the inside cover Loosen nut B while holding screw A for the looper front to back adjusting pin with a screwdriver Then move the front to back rod front or back To increase the amount move alignment mark D on the front to ba...

Страница 13: ... its stroke When the point of the looper has reached the center of the right needle push out the needle guard rear slightly toward you Then there should be a clearance of 0 0 05mm between the needle and the looper In addition there should be a clearance of 0 05 0 1mm between the left needle and needle guard rear Adjustment is made by loosening screws B and C Be careful that the relationship betwee...

Страница 14: ...e center of the left or right needle should be 0 1 0 3mm To adjust the height of the needle guard front loosen screw A and set the distance from the point of the left needle to the needle guard front when the point of the looper has reached the center of the left needle at 1 5 2mm To adjust the needle guard front front to back loosen screws A and B and set the clearance between the needle guard fr...

Страница 15: ...hen move the adjusting lever pin in direction a or b To decrease the amount move the pin in the direction of a To increase the amount move the pin in the direction of b 7 7 7 7 2 Position of the spreader thread guide 2 Position of the spreader thread guide 2 Position of the spreader thread guide 2 Position of the spreader thread guide The clearance between spreader thread guide B and spreader A sh...

Страница 16: ...dle shift mark C in the direction of E 8 FEED DOGS STITCH LENGTH 8 8 8 8 1 Feed dog height tilt 1 Feed dog height tilt 1 Feed dog height tilt 1 Feed dog height tilt Height When the feed dogs are at the top of their stroke the main and differential feed dogs should be parallel with and 1 1 2mm above the needle plate Adjustment is made by loosening screws A and moving each of the feed dogs up or dow...

Страница 17: ...djust the stitch length with lever B secure lever B with nut C as required The range extends from the reading read by lever B when adjusting knob A is turned to the reading at which lever B is stopped by stopper D To adjust the stitch length during sewing connect a chain to the lever 8 8 8 8 3 Differential feed 3 Differential feed 3 Differential feed 3 Differential feed Remove plug A Loosen screw ...

Страница 18: ...so that the needle can drop correctly to the center of the presser foot needle drop hole Position of the presser foot Loosen screw A Adjust by moving the presser foot left or right while checking to make sure the needle drops correctly to the center of the presser foot needle drop hole Foot lift For machines with the spreader the presser foot should be 6mm above the top surface of the needle plate...

Страница 19: ...e 2 Position of the thread guide on the needle thread take up up up up When the needle bar is at the bottom of its stroke needle thread take up bracket A should be level and the distance from the center of the shaft to the thread guide of needle thread take up B should be 75mm To make this adjustment loosen screws C and D To tighten the needle thread move needle thread take up to Y To loosen the n...

Страница 20: ...ead take 5 Position of the thread guide of the spreader thread take 5 Position of the thread guide of the spreader thread take up up up up When the needle bar is at the top of its stroke thread any one of parts A B and C on the spreader thread take up with spreader thread For woolly threads Thread B or C For cotton threads or spun threads Thread A and adjust the spreader thread take up according t...

Страница 21: ...2 needle machines the point of the left needle is slightly above the bottom surface of the looper blade 11 REPLACING THE TIMING BELUT 1 1 1 11 1 1 1 1 Marks on the timing belts 1 Marks on the timing belts 1 Marks on the timing belts 1 Marks on the timing belts The X Series is available in timing belts of A B and C according to the distance between the upper and lower shafts A indicates the longest...

Страница 22: ...e looper to the extreme right end of its travel by turning the machine pulley Bring the needle bar down to the bottom of its stroke by hand 4 Then place the belt onto the timing pulley on the upper shaft Tighten two screws A 5 Bring the needle bar up to the top of its stroke by turning the machine pulley Check to make sure mark P on the handwheel is aligned with alignment mark O on the bed 6 To ma...

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