p fr: \ hobbylock 787 788 • Instruction manual
IMPORTANT SAFETY INSTRUCTIONS -This sewing rrachine is designed and manufactured for HOUSEHOLD use only. When using an electric appliance, basic safety precautions should always be followed, including the following: Read all instructions before using this sewing machine. D AI\IG ER To reduce the risk of electric schock: 1. The sewing machine should never be left unattended when plugged in. Always unplug this appliance from the electric outlet immediately after using and before cleaning. 2.
Contents Controls of the sewing machine Accessory box Electrical connection Master switch and sewing light Foot control Notes on safety How to handle the thread spool stand t.
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e Controls of the sewing machin 1 Thread spool stand 2 Carrying handle 3 Left needle thread tension dial 4 Right needle thread tension dial 5 Right looper thread tension dial 6 Left looper thread tension dial 7 Thread tension cover 8 Lint box 9 Handwheel 1 0 Looper cover with recess 11 Upper knife 1 2 Swivel-type work support 1 3 Needle plate 14 Sewing foot 1 5 Needle holder 1 6 Sewing foot lifting lever 1 7 Thread spool holder 18 Color-coded thread guides 1 9 Telescopic thread guide bar 20 Machine socket 2
Accessory box Swing open work support 1 2 and pull out accessory box 24. The accessory box can only be inserted in its compartment when held as shown in the illustration at left. The guide groove is up and the projection of the box faces the machine. Electrical connection Use this machine only on a flat surface or on a special machine table. Connecting foot control 28: Insert plug 29 of the control in machine socket 20. Then connect mains plug 30 to a power source.
Switching the machine ON and OFF Power and sewing light together are switched on and off with master switch 21. Switching on: Press switch. Machine and sewing light are switched on. Switching off: Press switch again. Machine and sewing light are switched off. Foot contro’ The speed of the Hobbylock is regula ted as follows: The more you press the foot control down, the faster the machine will sew. Electronic foot control Maximum speed can be pre-selected in two steps by the switch on the foot control.
e3-O ———— I How to handle the thread spool stand Pull thread spool stand 1 as far as it will go in the direction indicated by the arrow. \ — Fully extend telescopic thread guide bar 19. Slowly turn the two upper tele scopic sections until you hear their detent balls snap in place. After use fold up telescopic thread guide bar 19. read spool stand (with or machine.
____ 1 Opening and closing looper cover and work support Push looper cover 10 fully to the right, hold it, and swing it down. To close the looper cover, push it up until it locks. To open work support 12. push it in the direction indicated by the arrow. To close the work support, push it lightly until it locks. Behind the looper cover converter 41 (Hobbylock 788) is illustrated with its slide settings for the respective stitch type.
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j Threadng the left looper Thread left looper 32 (yellow thread path) in sequence 1 to 6. From thread guide 6 pull the thread through looper eye 7. Align the mark on handwheel 9 with the mark on the housing. Tauten the thread a little and place it in thread guide B by means of tweezers 43. / z/__w__J 1 Thread guide 9 is threaded by means of looper threader 40. 1 The mark on handwheel 9 must be aligned with the mark on the hou sing. 2. Tauten the thread a little. 3.
Threading the right needle Threading of guide wires 18 and 22 is shown on page 7. In the left-hand illustration the threa ding path is shown from green tension 1 up to right needle eye 6. Thread the needle from the front. The use of needle threader 42 is desc ribed on the next page. Threading the left needle Threading of guide wires 18 and 22 is shown on page 7. In the left-hand illustration the threa ding path is shown from blue tension 1 up to left needle eye 6. Thread the needle from the front.
Needle threader is Lower the sewing foot by means of lif ting lever 16. Turn the hand wheel until right looper 31 is positioned right of the needle (see top of page 18). Place the thread in slot A of needle threader 42 and tauten it a little, holding the needle threader a little turned to the front. With the needle located between the two guide lugs B move the needle threader slowly downwards at the rear side of the needle until small hook C engages in the needle eye.
After threading the machine, push handle 2 down, and close work support 12 and looper cover 1 0. Inserting the lint box: Insert the two tabs of lint box 8 down wards in the recess of looper cover 10. Then push the bottom of the box against the machine. For removal of the lint box, use the revese order. Seam allowance If the cutting is guided along below mark N on looper cover 10, a seam allowance of 16 mm must be taken into consideration when cutting the fabric.
Sewing test After threading, a sewing test should be made. Raise sewing foot lever 16, as shown in the illustration. Hold the thread ends with your left hand while turning the hand wheel with your right hand in the direction indica ted by the arrow on the wheel. Hold the threads taut and lay them back under sewing foot 14. Make sure the threads interlock correctly during sewing (thread chain). Insert the test fabric up to upper knife 11 and lower sewing foot lever 1 6.
Points to observe during sewing Sew the first stitches slowly. If the machine has been rethreaded, place the fabric under sewing foot 14 and push it up to the needle before starting to sew. Since the fabric is fed automatically, do not pull or push the fabric. Use your hands for guiding only. Thread cutter In order to be able to use thread cutter 39 it is necessary to sew beyond the end of the seam. Draw the resulting thread chain through the thread cutter from the rear (see illustration below left).
Face side ;1 .:.• thread \ Reverse side Left looper thread Right needle thread Left needle thread Setting the standard thread tension N Optimum seam appearance depends on the type of fabric used, on the thread size, and on the thread tension setting. Set the N on the thread tension dials opposite the round colored mark on thread tension cover 7 (see illustration below).
Possibilities requiring thread tension corrections When the thread tension is turned in (+) direction, the tension is increased. When turned in (—( direction it is dec reased. The left needle thread A is too loose (blue thread tension). The right needle thread B is too loose (green thread tension). 1. The right looper thread C is too tight (red thread tension). 2. The left looper thread 0 is too loose (yellow thread tension(. 3. Both tensions must be corrected. 1.
i 3-thread overedge seam: Threading of the right and left looper is described on pages 8 and 9. The slide of converter 41 must be set at its right position B (see p. 18). The 3-thread overedge seam is sewn with two looper threads and one needle thread. Seam width adjustments at adjustment knob 26 (3 to 5 mm) only refer to the right needle. When the left needle is used, the set value is increased by 2.2 mm (seam width 5.2 to 7.2 mm).
Engaging the converter (HL 788) For the Hobbylock 787 the converter is available as a special accessory part (see p. 42 and 46). Turn the hand wheel until right looper 31 is positioned right of the needle. For sewing with converter 41 the right looper thread must be cut off and pul led out of the looper eye. All seams sewn with converter 41 are only sewn with left looper 32 and with one or two needle threads.
2-thread overeoge seam r is Left needle Rght needle Standard seam width N Standard seam width N Adjustable range 5.2 to 7.2 mm Adjustable range 3 to 5 mm er The left-hand llustration shows the 2-thread oeredge seam with correctly set thread tensions. B / / n /1 / / /, ‘ Possible correction requirements: 1. Looper read A is too loose (yellow thread tension>. 2. Needle thread B is too tight (blue or green thread tension>. 3. Both tensions have to be corrected. 1.
Thread chart for 2-, 3-, 4-thread overedge seam Material Light materials: Organdy, light-knit fabric. Taffeta, silk, lining materials Medium-heavy materials: Cotton, tricot, linen, dress materials Heavy materials: Tweed, suit materials, denim, heavy cloth Knit fabrics: Rolled hem with 2 or 3 threads (bulk thread) Stitch length Thread No. 80- 100 Cotton No. 80- 100 Silk Synthetic thread No. 70- 140 2.0 to 4.0 mm No. 60-100 Cotton No. 50-100 Silk Synthetic thread No. 70-140 2.0 to 4.0mm No.
Adjusting the differential feed on the Hobbylock 788 The differential feed prevents inter-ply shift. It consists of two feed dogs, arranged one behind the other, which both pick up and move the workpiece at the same time. The feed amount of either feed dog can be set separately. It is possible to have the workpiece moved more by the front feed dog than by the rear one and vice versa. Owing to that very good sewing results are accomplished.
This table indicates possible settings of the differential feed of the Hobbylock 788. In order to make sure about the setting required for the fabric you wish to process, a sewing test has to be made. The differential feed can also be set during sewing. — Setting of differential feed Illustration Correct seam Fabric 0.5 to N 1 a Nylon, tricot, lining fabrics, satin, poplin, and silk N 2 c Light cotton, jeans (normal fabrics) 1.5 3 d Jersey, medium cotton, nicki fabrics, light knittings 1.
I Disengaging the upper knife Remove lint box 8. Open work support 1 2 and looper cover 1 0. If necessary, loosen upper knife arresting screw 37. Push rotary lever 27 of the axial upper knife guide fully to the right, hold it, and turn it forwards until the pin enga ges in the hole of the knife. Now the upper knife is disengaged. Adjusting the seam width The standard seam width setting is marked with N (3.5 mm). Disengage upper knife 11 according to the above description.
Changing the sewing foot Raise sewing foot lifting lever 1 6. Disengage the sewing foot by pressing lever F. Engaging the sewing foot: Place the sewing foot under the sewing foot holder so that when you lower the sewing foot lifting lever, crosspiece G of the foot engages in groove H of the sewing foot holder. Changing the light bulb: Pull out the mains plug. Loosen lamp cover retaining screw 38. Open the lamp cover. Behind it, the light bulb of the sewing light is situated.
— - I 1 - Cleaning the thread tensions; At the points indicated, press thread tension cover 7 in the direction of the arrows, thus loosening the cover, then remove it towards the front. / 5. Set the 4 thread tensions at Use the cleaning brush (accessories) to remove dust and lint from between the tension discs of the 4 tensions. Reset all thread tensions to N. or to the values set before cleaning. — - J — 1 _• ‘ ‘ z.
Face side Reverse side MW Fold-over 3-thread roiled hem sewn with polyester thread 120 -140. A rolled hem is used for light, delicate fabrics and is an attractive finish for open edges. Without any effort you can sew professional rolled hems on neck scarves, shawls and valances. This rolled hem is sewn with three threads (see page 27).
Rolled hem with polyester thread Preparation of the sewing machine: remove left needle / insert right needle Needle: Sewing foot: engage rolled-hem foot ,,R” from 3.0 to 4.0 mm (depending on material) Seam width: Stitch length: from 1 .0 to 2.0 mm (short stitch length) polyester thread 120-140 for green, red and yellow thread tensions Thread: Threading path: polyester thread 1 right looper, red path polyester thread 2. left looper, yellow path polyester thread 3. needle thread, green path and pages 7 to 11.
Hobbylock 788 2-thread rolled hem sewn with converter 41 (for this purpose the slide must be in position Asee p. 181. insert right needle Needle: rolled-hem sewing foot Sewing foot: N (3.5 mm> Seam width: Stitch length: 1 .0 to 2.0 mm For the Hobbylock 787 the converter is available as special accessory part (see p. 42 and 46>. 2-thread rolled hem A 2-thread rolled hem requires less thread and the seam has a finer look.
Changing the needles Pull out the mains plug. Lower the l in sewing foot. Turn the hand whee the direction of the arrow until the needle bar is at its highest position. loo Hold the needle with the tweezers, w scre l smal the with B or sen screw A ds. driver, and pull the needle downwar out of the needle holder. Inserting the needle the The needle has to be inserted with flat side of its shank facing rear.
Changing the upper knife: Pull out the mains plugl Unscrew knife retaining screw 35 and remove upper knife 11. Disengage the upper knife, see page 23. Insert the new upper knife and tighten its retaining screw securely. Reset upper knife to its cutting position. Set upper knife with knife guide 27 up (cutting position>. Turn the handwheel until the upper knife is at its lowest position. In this position, the front edge of the upper knife must be 0.5 to 1 mm below the cutting edge of the lower knife.
1: Changing the lower knife Pull out the mains plug! Disengage the upper knife (see p. 23). Remove retaining screw 34 of lower knife 33. Turn seam width adjustment knob 26 at position 3 (smallest seam width). Hold the new lower knife in such a way that the pin extends into the front hole of the lower knife. Then screw down retaining screw 34 together with the pressure tab. Align the cutting edge of the lower knife so that it is flush with the needle plate surface.
Upper knife arresting Sewing very thick fabrics and workpie ces with different ply thicknesses: On this machine, all kinds of fabric from extremely thin to extremely thick can be processed. When sewing extre mely thick fabrics or workpieces with different thicknesses, the screw of the upper knife must be tightened, as shown in the illustration. By tightening screw 37, the upper knife is arrested axially.
Oiling the machine: Every time before you take the machine into operation, you should apply a little oil to the places indicated. The bus hings and other important moving parts are made of special material and need to be oiled only once or twice a month. One to two drops of PFAFF sewing machine oil are sufficient.
Stitch selection table feed setting The values set for thread tension, stitch length, needle size, and the differential i.e. to the type application, the to according varied be have to that settings basic only are (788) used. thread the and of fabric, the fabric thickness, at right). The sewing foot must be selected according to the seam width (see ill, (see 22). sewn p.
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Stitch type (see table on p.
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(se:tle on p 20) Stitch type Needle thread tension blue Decoratme 3-thread sergng seam 3-thread fiatioce Seam) tight — medium — heavy Decoratme 3-thread sergrng seam wide 3thread fiatiock seam) 3-thread rofled hem narrow) tight green — + 2 ± 4 2 — 2 + 4 5 1 -5 +1 +3 heavy —5 +1 +5 1 — — Size 90 14 1 N 1 N 1 N 90 Size 75 ——--------=— N medium Oided 3-thread roiled hem - light tight + N N medium 2-needie 3-thread overedge ciosirtg seam I — — 3 2 — +
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Sewing problems and solutions These machines have been developed for easy operation, and there are no difficult adjustments to be made. Sewing problems of the kind described below may occur due to minor adjustment. and operation errors. They can easily be corrected by following the instructions below.
Prob’em Cause So’ution Machine does not run although master switch is on Power supply interrupted looper cover 1 0 or work support 1 2 (see p. 7( Close looper cover 10 or work support 1 2 (see p. 7( Fabric not neatly trimmed Sewing lint between upper and lower knife Clean knives (see p. 32) Upper knife blunt Exchange upper knife (see p. 30) Thread tension too tight Reduce thread tension (especially for light materials) (pp.
Accessories 1 Screwdriver (big) 2 Screwdriver (small) 3 Lint brush 4 Tweezers 5 Upper knife 6 Thread unreeling disc 7 Needles 8 Sewing machine oii 9 Rolled hem sewing foot (R) 10 Sewing foot N2 11 Sewing foot N3 1 2 Thread spool net 13 Needle threader 2 Description of specia’ accessories on pp.43—50 Elastic tape sewing foot Part No. 29-924 993-80/000 Taping foot Part No. 29-924 993-82/000 Blindstitch sewing foot Part No. 29-924 993-81/000 O 9 8 7 6 Bead sewing foot Part No.
Thread spool net Very useful for synthetic threads which tend to become loose, unravel and slip down (Fig. A>. Thread unreeling disc B The thread unreeling disc shown as item 6 of the accessories is used for smaller thread spools. Remove thread spool centering piece 36 from the thread reel pin. C Put the thread spool on the thread reel pin and place the thread unreeling disc on top of it, with rounded-off section C facing down, as shown in Fig. B.
beads fabric N 1—1.5mm Fig. 2 Fig. 1 Bead sewing foot (Fig. 1) s, strass bands, lead- and ordi This special sewing foot is for sewing on beads, sequin . needle one with out carried are nary cords. These operations 788) 1. Set differential feed at N (Hobbylock 2. Insert bead sewing foot 3. For small beads use the right needle For large beads use the left needle (787, 7881 end of the foot (Fig. 11. 4.
.1 E’astic tape sewing foot 2 1 3 This special sewing foot is for sewing on an elastic tape; in the same opera tion the fabric is trimmed and serged, and also gathered by the contracting elastic tape. Preparing the machine Differential feed setting: set at N (Hobbylock 788) use 1 or 2 needles, depending on tape width insert elastic taping foot Needles: Sewing foot: Thread tension: Stitch width: Stitch length: 4 to 4.5 approx.
Taping foot 1 This special sewing foot is for sewing on tapes. On stretch materials (knitwear) the seams are prevented from stretching when a tape is sewn on. Preparing the machine Differential feed setting: Needles: Stitch width: set at N (Hobbylock 788) use 1 or 2 needles, deoending on tape wiath 3 to 5 mm (adjustable for a tape width from 4 to 9 mm) Stitch length: Thread tension: Inserting the tape: 1 .Set needle at highest position. 2. Disengage upper knife. 3.
Cording foot 1 This special sewing foot s used for sewing a cording tape between two fabric plies in one operation Preparing the machine Differential feed setting: Needles: Sewing foot: Upper knife: Thread tension: Stitch width: Stitch length: set at N (Hobbylock 788) two needles or left one engage cording foot engaged 3 to 5 inserting the fabric plies 1. Raise the sewing foot 2. Set needle at its highest position 3.
3 Shirring foot (Hobbylock 788) This special sewing foot is used for joi ning two pieces of fabric and shIrring the bottom ply in one operation. Preparing the machine Differential feed setting: 1 48 set at N (Hobbylock 788) two or one engage shirring foot engaged Needles: Sewing foot: Upper knife: Needle thread ±3 to +5 tension: Stitch length: Inserting the fabric plies 1. Raise the sewing foot. 2. Set needle at its highest position. 3.
Gimp thread sewing foot This special sewing foot is used for sewing in gimp threads (cords, synthe tic threads) up to a thickness of 1.0 mm. By this means a wavy, i.e. more firm hem finish is achieved (e.g. on wedding dresses, curtains, etc.). Preparing the machine Differential feed setting: Needle: Stitch width: Stitch length: Thread tension (cf. section ,,Rolled hem): set at N (Hobbylock 788) insert right needle (HL 787, 788) 3 to 4 mm 1.0 to 1.5 mm right looper approx.
A Specifications: Maximum sewing speed Seam width Stitch length • 1,300 stitches/mm. 3—7.2mm 1—4mm(HL788) 5 mm (HL 787) 1 inged Manual 5mm 130/705 H or 1 5 x 1 H 75-9Oorll-14 2,3,4/3,4 315x280x330mm 8.5 kg/8.Okg — Sewing foot Lubrication Sewing foot height Needle system Needle size Number of threads 788/787 Dimensions Weight 788 / 787 . .
