Gebruiksaanwijzing /service van het product hobbylock 786 van de fabrikant Pfaff
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747! instruction manual ii; II. I V.
Notes on safety A) Owing to the up and down movement of the needles and the upper knife, the user must take sufficient care to avoid injury and observe the sewing area continuously while sewing. B) When leaving the machine, changing parts or accessories, the machine must be disconnected from the power source.
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4 4 5 6 7 7 8 8 9 10 10 11 11 12 13 14 14 15 16 17 18 18 19,20 21 21 22 23 23 24, 25 26 26 27 28 29 30 31 31 32 32 & 2. 3 Contents Controls of the sewing machine Electrical connection Master switc.
I Controls of the sewing machine 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 ten.
Electrical connection Use this machine only on a flat surface or on a special sewing table. Connecting the foot control: Insert the plug of the control in the machine socket. Then connect the mains plug to a power source. Caution: When the machine is not in use, switch it off at the master switch and disconnect the plug from the power source.
Foot control A) Owing to the up and down movement of the needles and the upper knife, the user must take sufficient care to avoid injury and observe the sewing area continuously while sewing. B) When leaving the machine, changing parts or accessories, the machine must be disconnected from the power source.
Installing the thread spool stand Loosen clamp screw A a little and pull washer up to the screw head. Insert A / thread spool stand 1 from the top. Tighten clamp screw A securely. ________I 4 Insert four thread spool holders 17 with centering pieces 36 fully in the holes of the thread spool stand.
I n E1 H Opening and closing looper cover and work support Push looper cover 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 to the left. To close the work support, push it to the right until it locks.
4-thread overedge seam This seam is sewn with two needle 2 1 threads and two looper threads. - The 3-thread overedge seam is - described on page 17. 3 Threading the right looper: Thread the right looper in sequence 1 to 9 and pull approximately 10 cm (4”) 4 of thread through the looper eye (the thread path is marked red).
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Threading the right needle Threading of guide wires 18 and of the thread guide behind the carrying handle is shown on page 7. In the left-hand illustration the threading path is shown from the green tension (1> up to the right needle (6>. At point 5 the thread must be pulled behind the thread retainer.
I After threading the machine, push handle 2 down, and close work support 12 and - looper cover 10. I-J Inserting the lint box: downwards the cover. Then push the bottom of the box / against the machine.
Sewing test - —- After threading, a sewing test test should be made. Raise sewing foot lever 16, as shown in - . . - the illustration. ‘I / / . / Insert test fabric up to the upper knife and lower the sewing foot.
Points to observe during sewing Place the fabric completely under the sewing foot when starting to sew. (Also after the machine has been rethreaded.) Sew the first stitches slowly. Since the fabric is fed automatically, do 4 not pull or push the fabric.
Securing the seam: Blocking the upper knife Sewing very thick fabrics and workpieces with different thicknesses: On this machine, all kinds of fabric from extremely thin to extremely thick can be processed.
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Correcting the thread tensions When the thread tension is turned in (+) direction, the tension is increased. When turned in (—) direction it is decreased. The left needle thread A is too loose (blue thread tension). J The right needle thread B is too loose (green thread tension).
fl 3-thread overedge seam Left needle Right needle !J Standard seam width N Standard seam width N * 5,7 mm 3.5 mm Max. seam width 7.2 mm Max. seam width 5 mm I 3-thread overedge seam: The 3-thread overedge seam is sewn with two looper threads and one needle thread.
Thread chart for 4-thread overedge seam Material Thread Stitch length Light materials: Organdy, light-knit Cotton No. 80—100 2.0 to 4.0 mm fabric, Taffeta, silk, Silk No. 80—100 lining materials Synthetic thread No. 70—140 Medium-heavy materials: Cotton No.
Adjusting the differential feed on the hobbylock 786 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.
This table indicates possible settings of the differential feed. 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 dif- Correct Illustration Fabric ferential feed seam poplin, and silk 0.
* 0 cA — fl Disengaging the upper knife Remove lint box 8. Open work support 12 and looper cover 10. If necessary, loosen screw 38 for axial upper knife blocking. Push rotary lever 27 of the axial upper knife guide fully to the right, hold it, and turn it forwards until pin A engages in the hole of the knife.
r Changing the sewing foot Raise sewing foot lifting lever 16. the sewing foot by pressing Engage 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.
Removing the light bulb: Push the light bulb upwards and turn it fully to the left. Inserting the light bulb: Insert the new bulb (15 Watt max.) with the pins in the slots, push it up and turn it fully to the right.
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I Rolled hem with polyester thread Preparation of the sewing machine: Needle: remove left needle Sewing foot: engage rolled hem foot “R” Seam width: from 3.0 to 4.0 mm (depending on material) Stitch length: from 1.0 to 2.0 (short stitch length) Thread: polyester thread 120—140 for green, red and yellow thread tensions Threading path: 1.
Changing the needles Pull out the mains plug. Lower the sewing foot. Turn the hand wheel in the direction of the arrow until the needle bar is at its highest position. Use the needle change tool from the accessories (see p. 31, tern 11) as follows: Insert the needle in hole M of the needle change tool.
I __ __ ____ Changing the upper knife: Pull out the mains plug. - Unscrew the knife retaining screw and - remove upper knife. / 1 [ Insert the new upper knife and tighten its retaining screw securely. I— L_—-- . N’ Set upper knife with knife guide 27 up (cutting position).
I /( Changing the lower knife Pull out the mains plug’ Disengage the upper knife (see page 21). Remove the retaining screw of the lower knife. Place the new lower knife against the left guide of the lower knife holder and push it up, as shown in the illustration.
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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.
Accessories 1 Screwdriver (big) 2 Screwdriver (small) 3 Lint brush 4 Tweezers 5 Upper knife 6 Thread unreeling disc 7 Needles 8 Sewing machine oil 9 Rolled hem sewing foot 10 Thread spool net 11 Needle change tool Thread spool net Very useful for synthetic threads which tend to become loose, unravel and slip down (Fig.
Specifications: Maximum sewing speed Seam width Stitch length Sewing foot Lubrication Sewing foot height Needle system Number of threads Dimensions Weight Hinged Manual 5mm 130/705 H (no.
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