Оверлок hobbylock 776 pfaff инструкция

fhEbEbyflD 71

OPERATING INSTRUCTiON

CONTENTS

A. Parts names 2

B. Preparation for the sewing 4

a. Preparation 4

b. Fitting the foot controfler 4

c. How to adjust the foot controfler 4

d. Turning on / off the amp 4

e. Lubrication 5

f. Opening and closing looper cover and side cover 6

g. Threading procedure 6

C. Operating the machine 9

a. Test sewing g

b. Thread tension adjustment (Normal hemming) 9

c. Dial chart for thread tension adjustment 9

d. Relation chart for fabrics and thread stitch length 10

e. Correct thread tension 10

f. Incorrect thread tension and how to adjust 11

g. Roll hemming 12

h. Points to observe during sewing 13

i. 3-thread overedge seam 14

D. Some adjustment / Maintenance 15

a. Adjusting the seam width 15

b. Adjusting the stitch length 16

c. Differential feed mechanism 16

d. Replacing needle (S) 17

e, Replacing the upper knife 18

f. Replacing the lower knife 19

g. Replacing the light bulb 19

F. Sewing problems and solutions 20

A. Parts name

o Front side

Telescopic thread reel stand bar

Rear side

Pulley wheel

feet

2

Accessories

Screw driver

Screw driver (For needle)

Iweezers

Oiler

Specifications Maximum speed Overlock seam width Stitch length

Presser foot Presser foot lift Needle Number of threads Lubrication Dimentions Net weight

Brush for dusting

Upper knife

1 300 s.p.m. 3.5mm (standard) 1.0 — 4.0mm Hinged 5mm

130 / 705H No.75 No.90 4 Manual 278(W) x 264(D) x 310(H) 7Kg

Roll hemming presser foot

Thread stripping discs (4 pcs.)

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Accessories case

Needle

Looper mechanism Controller

Dust cover

3

S. Preparation for the sewing

a. Preparation

This machine must be used on a flat and

horizontal surface or purpose-built sewing

machine table.

b. Fitting the foot controller

First, insert the controller connector into the

connector socket on the machine as shown

in the illustration, then connect the plug to

a power source.

c. How to adjust the foot controller

Place the tip of your foot lightly on the pedal.

When you press down gently, the machine

will begin to run at low speed: As you press

more heavily the machine will run faster. To

stop the machine, lift your foot from the pedal.

d. Turning on / off the lamp

Sewing light is switched on and off by the

master switch located right side of the body.

By switching on the machine, sewing light

is turned on and by switching off the machine,

sewing light is turned off.

4

e. Lubrication

The bushings and other important parts are made from special materials and only require lubrication once or twice a month. When oiling

always be sure to use a good quality sewing machine oil. Apply just one or two drops of oil to the areas indicated.

5

f. Opening and closing looper cover and side cover

1. To open the side cover, push it to the direc tion of the arrow. To close side cover, push it to the right until it locks.

2. To open the looper cover, slide the looper cover to the right, swing it down towards you.

3. To close the looper cover, push the looper cover upwards lightly towards the machine until it clicks and it will close securely.

g. Threading procedure

1. Ensure that the telescopic thread guide bar is at maximum vertical height.

2. Threading must be done carefully in accord ance with the threading procedure in order to obtain a correctly formed seam.

3. Position the telescopic thread guide bar so that it immediately aligns above the thread reel bar pins.

4. Tweezers from the accessories bag will assist you to make threading easier. ff7

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3. Next thread the right needle

surplus thread about 5 cm (about 2) needle eyes.

surplus thread about 5 cm (about 2)beyond needle eyes.

It would be helpful in the initial stage, (before commencing to sew) that differentcoloured threads are used. Similar to those illustrated on the Tension Dial Diagram(4), this will identify the threads being used with respective needle and looper.Once you are satisfied that the tension balance is correct (page 1 0) tie on thosethreads that are to be used. Be careful when passing these threads through the machine, so as to avoid anybreakage of thread that may occur if due care is not taken.Then proceed to sew with caution until you are satisfied that the correct results are achieved.

4. Lastly thread the left needle

8

C. OPerating the machine

a. Test sewing

After threading, be sure to make a test sewing

before actual operation.

Procedure

1. Hold the 4 threads by your left hand and

turn the pulley 2 or 3 turns slowly towards

you with your right hand.

Checking the threads being interlocked.

2. Insert the cloth under the presser foot up to

the edge of the upper cutter and start

sewing slowly.

b. Thread tension adjustment (Normal hemming)

The correct thread tension varies depending on the fabric and type and thickness of the

thread and must therefore be adjusted accordingly. By refering to the chart below it will assist

you in achieving the best results.

c. Dial chart for thread tension adjustment

Thread

Fabrics L.needle R.needle R.lper L.looper 1 ft

Thread Dial for Dial for Dial for Dial for Presser

L.needle R.needle Rjooper Liooper

Spun Spun Spun Spun 3 3 3 3

I Broad iply

for

Denim 2plies 4 4 3 3 Normal

hemming

Georgette 2plies 2 2 3 3 J

I Spun Spun Spun Spun Broad iply I *80 *80 *80 *80

3 3 10 for

Roll

Georgetteiply 2 3 10 hemming

Narrow hemming

i Fold-over hemming

9

d. Relation chart for fabrics and thread stitch length

Fabrics Thread Stitch lengthLight Cotton No.80100Organdy, light-knit fabric, Silk No.80100 3.Oto4.OmmTaffeta, silk,lining materials Synthetic thread No.80

Medium Cotton No.60100Cotton, tricot, linen, Silk No.50100 3.0 to 4. 0mmNormal dress materials Synthetic thread No.6080hemming Heavy Cotton No.4060Tweed, suit materials, Silk No.4060 3.0 to 4.0mmdenim, heavy cloth Polyester thread No.3060 Polyester thread No.5080Knit fedrics Synthetic thread No.6080 2.0 to 4.0mmWoolly nylon

Roll georgette Polyester thread No.80100 Synthetic thread No.80100 1.0 to 1.5mm

hemming tricot Woolly nylon

e. Correct thread tension

Top side

Right needle thread

Left needle thread

10

f. Incorrect thread tension and how to adjust

1. The sketch shows the left needle thread

tension is too loose.

2. The sketch shows the right needle thread

tension is too loose.

3. The sketch shows the right looper thread

tension is too loose.

4. The sketch shows the left looper thread

tension is too loose.

11

Remove the left needle first. For the roll hemm

ng (narrow / foldover hemming) replace the

normal stitch foot by the roll hemming foot.

By following this instruction, very good sewing

results can be achieved.

1 .Raice the presser foot and then push up the

small lever. The foot for normal sewing can

then be taken off.

2. With the presser foot still raised, place the

roll hemming foot under the shank and

lower the shank until connecting points are

in contact, then lower the presser foot and

the new foot will then be engaged.

g. Roll hemming

. Normal hemming toot

. Roll hemming foot

How to replace the presser toot

Correct thread tension of roll hemming

o 0 0 0 0 0

Narrow hemming

Top side

Fold-over hemming

12

h. Points to observe during sewing

Place the fabric under the cutter and lower

the foot before commencing to sew.

Then slowly sew the first few stitches, the

fabric will feed automatically and gentiy

guide by hand.

Do not push or pull the material so as to

avoid the possibility of breaking the needles.

Caution pushing or pulling of fabric can result

in needle breakage and cause further damage

to needle plate, and looper mechanism.

For finishing a seam, sew approximately 5

cm beyond the end of the seam then cut the

thread chain.

Securing the seam:

Tie the thread chain. For knit fabric, a

crochet needle can be used to pull the thread

chain into the seam.

To prevent unravelling of seams, sew ap

proximately 5 cm beyond the seam. Then,

flip fabric over and sew over the seam ap

proximately 2 cm.

This machine will sew from fine to very heavy

fabrics. When sewing very heavy fabrics,

tighten the upper knife screw. (see illustration).

Caution:

When sewing fine fabrics, remember to

loosen the upper knife screw again if you

have been sewing on heavy fabrics.

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I. 3 thread overedge seam

Three-thread sewing is possible by using

either right or left hand needles.

Threading procedure is as usual.

For wide seam sewing.

1 Remove the right hand needle.

2. Use the left hand needle thread and right &

left looper thread.

3. Seam width can be changed from 5 mm to

7 mm. (Standard seam width is 5,5 mm).

For narrow seam sewing.

1. Remove the left hand needle.

2. Use the right hand needle thread and right

& left looper thread.

3. Seam width can be changed from 3 mm to

5 mm.(Standard seam width is 3.5 mm).

Wide seam

Use left hand needle only.

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Narrow seam

Use right hand needle only.

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D. Some adjustments / Maintenance

a. Adjusting the seam width

Standard seam width is 3.5 mm. It can be

adjusted from 3.0mm to 5.0mm when using \Upper knife

control knob

the different materials.

1. Open the side cover and looper cover. Push

the upper knife control knob firmly to the

right and, whilst maintaining pressure, turn

releasing the pressure as the knife is lowered.the knob and knife towards you downwards,

To raise the knife, simply reverse the oper

ations above.

2. Adjust the required seam width by turning

the dial.

Wide Narrow

seam wtdt seam width

After adjusting the seam width, it may be

necessary to reset the thread tension. Seam Width d,alJ _\.

15

b. Adjusting the stitch length

1. Fully open the side cover by pushing away from you.

2. Turning the pulley wheel with your Right Hand, set the required stitch length by turning the feed regulator control dial (see right) NOTE: Standard stitch length is 3mm.

3. After this adjustment, close side cover

C. Differential feed mechanism

The differential feed mechanism, consists of two sets of feed-dog teeth moving independ ently to produce an even stitch formation on woven or knitted fabrics, and also other other wise troublesome materials. When adjusted correctly, it will eliminate uneveness and puck ering of seams. The ratio of the differential is that of the feed of the rear feed-dog teeth, against the feed of the front feed-dog teeth. These can be adjusted infinitely from 0.8mm to 2.0mm. To make these adjustments follow the instruc tions below:

1. Open the side cover (as for stitch length above).

2. Push the differential feed regulator knob backwards, in the direction of the arrow — see illustration and at the same time set the required differential ratio, by sliding it up or down.

3. After completing the adjustment, close the side cover.

NOTE:To achieve the correct final setting it will be neccssary to experiment with various ratios, using spare pieces of the same fabric and thread you intend using, until a satisfactory result is ob tained.

Setting ofFabric differential feed

0.8 Nylon, tricot, lining fabrics,

satin, polin, silk, and light cotton

Jeans (Normal fabrics) N

I .5 Jersey, medium cotton, nicki fabrics, light knitting

Heavy knitwear, very elastic 2 2.0fabrics, rib stitch goods

16

d. Replacing needle (S)

DURING THIS OPERATION DISCONNECT THE

MAINS PLUG FROM THE POWER SOURCE.

1. Removing needle (s)

Turn the pulley wheel towards you by hand,

(in the direction of the arrow), raising the needle

(s) to the highest position. Using a screwdriver,

loosen the needle clamp screw and remove the

needle(s). If necessary, use the tweezers supplied.

2. Fitting new needle(s)

Whilst in this position, insert new needle(s)

fully upwards into the needle holder(s) making

sure that the long groove in the needle(s) face

towards you. Then using a screwdriver, re-tighten

the needle clamp screw securely.

The recommended needle system are: 130 /

705H, and the normal recommended size is

No. 90.

Depending on the weight of fabric you are

using Needle sizes from No.75 to No.90 may

be used. Light weight materials needing a finer

needle, with a thicker needle for heavier weights.

Ensure you carry out this procedure correctly

as to not do so could result in thread or needle

breakage and also skipped stitches.

ATTENTION

When replacing needles, please take note

of the illustrations below:

The needle clamp screw for each needle

crosses the other. it is important to prop

erly insert the screws when refitting needles.

Take special care not to try to put back

the screw straight but rather follow the

slant and do not force the screw.

17

Fitting the left needle

screw

Fitting the right needle

screw

e. Replacing the upper knife

DURING THIS OPERATION DISCONNECT THE PLUG FROM THE MAINS OUTLET.

1. To remove the upper knife. Push into the right, and turn down anti-clockwise towards you, the upper knife release knob, until the knife is held in position by the carrier stopper (approximately horizontal to you). Then loosen the retaining screw and take off the knife, taking care not to touch the blade.

2. Fitting a new upper knife Place the new knife onto the carrier stopper (in the opposite manner as abnve), and, using a screwdriver, retighten the retaining screw (A) securely. Turn the release knob away from you, raising the knife to a vertical position, then, by releasing pressure on the knob, the knife will be brought firmly against the lower knife and behind the guard on the presser foot. It is now ready for normal operation. 3. To set the cutting position: Place the upper knife in the cutting position and, by turning the pulley wheel by hand towards you, lower it to its bottom positiOn at which point the tip of the upper knife should overlap the lower knife by 1 .0mm. When in this position, re-tighten the screw (A) securely, using a screw driver. If it is necessary to adjust, loosen the upper knife screw (A) and raise or lower as required. Only very tiny movements should be necessary.

Surface of needle plate

1.0mm

(A)

18

t. Replacing the lower knife

DURING ThIS OPERATION DISCONNECT THE

PLUG FROM THE MAINS OUTLET

1. To remove the lower knife.

First push into the right the upper knife release

knob turning t anti-clockwise to release the

upper knife (as described on page 1 7)

Loosen the lower knife screw and remove the

lower knife, taking care not to touch the blade.

2. Fitting a new lower knife

Insert the knife into the groove of the lower

knife holder and, with the cutting edge facing

right, set the knife so that the cutting edge of

the blade aligns with the surface of the needle

plate and then re-tighten the fixing screw securely.

using a screwdriver.

Replace the upper knife in its working position

by means of the release knob (see also page

17)

g. Replacing the light bulb

FIRST DISCONNECT ThE MAINS PLUG FROM

THE POWER SOURCE

Loosen the screw of the rear of the machine

body and remove the lamp cover.

Turn the bulb in direction (1) and remove it.

Insert the new bulb by pushing upward,

turning it in the direction (2).

Replace cover.

Caution: Use a maximum 1 5 watt bulb only.

19

E. Sewing problems and solutions

Used correctly, your machine should operate efficiently and without difficulty. However you may

from time to time encounter the occasional problem which usually results from not carrying Out

various adjustments in the recommended manner.

Listed below are the more common problems, together with their simple solution which should

overcome most of these difficulties.

Problem Cause Solution

Needle breakage Needle is bent or point damaged Insert new needle.

Needle not correctly inserted Insert new needle correctly.

Material pulled Do not pull or push material during

sewing.

Thread breakage Incorrectly threaded Thread correctly.

Thread has caught Check whether thread is caught at the

reel stand, etc.

Thread tension too tight Regulate tension.

Needle not correctly inserted Insert needle correctly.

Incorrect needle used Use needle system 130 / 705H only.

Skipped stitches Needle bent or damaged Insert new needle.

Needle not correctly inserted Insert needle correctly.

Incorrect needle used Use needle system 1 30 / 705H only. Incorrectly threaded Thread correctly.

Incorrect stitch Incorrect setting of thread Set thread tensions cor