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Notes on safety A) Due to the up and down movement of the needle, the user must take sufficient care to avoid injury and observe the sewing area continuously while sewing. B) When leaving the machine, chan ging parts or accessories, the ma chine must be disconnected from the power source. C) The maximum approved wattage of the light bulb is 15 watts. D) The drive belt must never be adjusted by anyone but an authorized Pfaff agent.
Contents The controls of the sewing machine Accessory box Electrical connection Foot control Preparing for threading Threading, 4-thread safety-stitch seam Threading chainstitch looper Threading overedge looper Threading the needles Inserting the lint box Sewing test Points to observe during sewing Securing the seam Checking and adjusting thread tension 4-thread safety-stitch seam 2-thread chainstitch seam 2-thread overedge seam Adjustment of the machine for two-thread chainstitch seam Thread chart Adjustin
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ontrols of the sewing machine 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Foot pressure regulating dial Thread guide Carrying handle Left needle thread tension dial Right needle thread tension dial Right looper thread tension dial Left looper thread tension dial Thread tension cover Upper knife Knife guard Presser foot lifter lever Hand wheel Looper cover Looper cover lever Work support Stitch length setting dial Needle plate Presser foot Needle bar Thread ree
Accessory box Swing the work support to the left and pull out the accessory box. To replace the accessory box, slide it into the grooves and push it until it locks. The accessories are illustrated on page 28. Electrical connection Use this machine only on a flat surface or on a special sewing table. Attaching the foot control; Insert the plug of the control into the machine plug socket. Then connect the mains plug to a power source.
Switching the machine ON and OFF Power and sewing light are switched on and off simultaneously with the master switch. Switching on: Press switch. Machine and sewing light are switched on. Switching off: Press switch again. Machine and sewing light are switched off. Foot control The speed of the Hobbylock is regulated as follows: When pressing the foot control gently, the machine will run at low speed; when pressing harder, it will run faster.
__A y Preparing for threading Adjustment of thread reel stand: Loosen the adjusting knob on the thread reel stand, slide it to the left and tighten it. Adjustment of thread guides: Pull up the thread guide bar and align it so that the thread guides are directly above the reel stand. Carrying handle and thread guide bar behind it: Insert fingers into the groove of the carrying handle and pull it up. This movement automatically raises the thread guide bar.
Opening and closing looper cover and work support: Push looper cover lever to the right, swing cover in the direction of the arrow and lower it. To close the looper cover, push the cover until it locks. To open the work support, push it to the left. To close the work support; push it to the right until it locks. A threading diagram is affixed to the machine (A). Threading procedure Threading must be done correctly to obtain a well-formed seam. Thread the machine in the following sequence: 1.
4-thread safety stitch seam For sewing and finishing two layers of fabric. Threading the left looper: Turn the handwheel towards you until the left looper is in its farthest right position (see illustration below). Thread the left looper in sequence 1, 2, 3, 4, 5, 6, 7, 8 and pull approximately 10 cm (4”) of thread through the looper eye (the thread path is marked yellow).
Threading the right looper: Turn the handwheel towards you until the right looper is in its farthest right position (see illustration below). Thread the right looper in sequence 1, 2, 3, 4, 5, 6, 7, 8 and pull approxima tely 10 cm (4”) of thread through the looper eye (the thread path is marked red).
lJ— 1 1j fl L li r 3 6 -- ( Threading the right needle: Thread the right needle in sequence 1, 2, 3, 4, 5 and pull approximately 10 cm (4”) thread through the needle eye (the thread path is marked green). Thread the left needle in sequence 1, 2, 3, 4, 5, 6, 7, 8 and pull approximately 10 cm (4”) thread through the eye of the left needle (the thread path is marked blue).
Now close the work support (1), push the handle down (2) and close the looper cover (3). 2 Inserting the lint box: Insert the tabs of the lint box into the slots (4) of the front cover. if Push the lint box up against the front cover until it snaps in place. Use the reverse order to remove lint box.
Sewing a test sample After threading, a test sample should b sewn. Raise presser foot lever, as shown in illustration. Place a piece of fabric under the needle and lower presser foot. Hold thread ends with your left hand while turning hand wheel counter-clock wise with your right hand. Make sure that threads have interlocked correctly.
Points to observe during sewing Place the fabric completely under the presser foot when starting to sew. (Also after the machine has been re-threaded). Sew the first stitches slowly. Since the fabric is fed automatically, do not pull or push the fabric. Use your hand for guiding the fabric only. Finishing seam Sew approximately 10 cm (4”) beyond the end of the seam and use the thread cutter (1) behind the presser foot to cut the thread chain.
Securing the seam: Knot the thread chain. In case of knitted fabrics, a crochet needle can be used in order to pull the thread chain into the seam. Or: Sew approximately 3 cm (1”) beyond the seam. Raise presser foot. Flip fabri over. Lower presser foot and sew over the seam approximately 2 cm (1/2”) without cutting the chain. Sewing very heavy fabrics and differeni thicknesses of fabric: This machine will sew through very thu to very heavy fabrics.
Setting thread tension: The thread tension should be adjusted according to fabric type and thread size. Examine the seam and make the necessary tension adjustments. Adjusting thread tension: Set all thread tension dials to “N”, standard setting. (See illustration below). Sew a test sample to be sure that the correct tension has been obtained. (See illustrations on the left).
— — — When the thread tension is turned in (+) direction, the tension is increased. When turned in (—) direction, it is decreased. Incorrect thread tension: The left needle thread is too loose (blue thread tension). — / t\ The right needle thread is too tight (green thread tension), or the right overedge looper thread is too loose (red thread tension). The right needle thread is too loose (green thread tension), or the right overedge looper thread is too tight (red thread tension).
The following seams can be sewn with this machine: 1. Four-thread safety stitch seam This seam is sewn with all four threads. It should be used to sew light to medium weight fabrics. Application: Closing seams, sewing sleeves into shirts and blouses, sewing curtains and drapes, etc. 2. Two-thread chainstitch seam Only the left needle JL x 1 and the left chainstitch looper are threaded. The right overedge looper is disen gaged and the right needle removed (see pages 18, 19). Application: Seaming materials.
Setting the machine for double chainstitch Remove the lint box, see page 11. Open looper cover. Remove knife guard (1) from the looper cover. Remove right needle. Raising the upper knife: Turn the hand wheel counter-clockwise to set the knife in the highest position. Push the knife holder to the far right and turn the knob clockwise until it locks. Disengaging the right overedge looper: Turn the hand wheel counter-clockwise until the needle is in the lowest position.
Inserting the fabric guide plate: Open the work support. Insert the fabric guide plate as shown in the illustration. Close the looper cover and work support. After sewing the two-thread chainstitch seam, set the machine for overedge seaming as follows: Open the looper cover. Open the work support and remove the fabric guide plate. Turn the hand wheel counter-clockwise until the needle is in the lowest position. Press the looper disengaging lever up (illustration below). Now the overedge looper is engaged.
Thread chart :1 Light fabrics Medium fabrics Material type Stitch type Thread Chainstitch Cotton Size 80—100 Synthetics Size 70—140 Overedge stitch Cotton Size 80—100 Silk Size 80—100 Synthetics Size 70-140 Chainstitch Cotton Size 60—1 00 Silk Size 50—100 Synthetics Size 70—1 40 Overedge stitch Cotton Size 60—100 Silk Size 50—1 00 Synthetics Size 70—1 40 Organdy, light knit fabrics, taffeta, lining, silk, etc. Cotton, medium knits, linen, satin, dress fabrics, etc.
Adjusting the stitch length: The stitch length is regulated by turning the stitch length dial. The numbers indicate the stitch length in mm. The normal stitch length is “N”. A = The red mark on the dial is the setting mark. Sewing foot pressure: Position “N” of the foot pressure dial is the standard sewing foot pressure. It is normally reset only for very thin or heavy fabrics. Thin fabrics: Reduce the sewing foot pressure by setting to a lower number.
Adjusting seam width: Standard setting is 3.5 mm. The seam width can be changed from 2.5 to 7.0 mm, according to fabric type and seam requirements. Note: Before adjusting the stitch width, always disengage the upper knife. To disengage upper knife, open looper cover. Push upper knife holder (1) to the far right. Turn knurled knob clockwise (2) until it clicks. Choose the required seam width by turning the stitch width dial (3). Normal stitch width is “N”.
Machine care Removing needle: Unplug the machine. Turn the hand wheel counter-clockwise to raise the needle bar to its highest position. Loosen the needle clamp screw with the allen wrench and pull the needle out. Inserting needle: When the needle bar is at the highest position, insert a new needle in the needle holder, making sure that the groove of the needle faces you. Push the needle up as far as it will go and tighten the needle clamp screw.
Loosen knife clamp screw (1) and pull the lower knife down. Inserting lower knife: Insert a new knife into the groove of the lower knife holder with the cutting edge facing right. Set the knife so that the cutting edge aligns with the surface of the needle plate. Tighten the lower knife clamp screw (1). Return the upper knife to its normal position.
Changing upper knife: The upper knife is carbide tipped and will not need to be replaced with normal use. It has to be replaced only when the cutting edge has been damaged. Unplug the machine. Push the upper knife holder to the far right and turn the knob clockwise until it clicks. Unscrew the knife retaining screw and remove the upper knife. To replace the upper knife, insert the retaining screw through cutout (1) of the knife. Screw it into threaded hole (2) of the knife holder.
• Changing the light bulb: Unplug the machine. Remove the retaining screw from light cover and swing cover to the Turn the bulb in direction (1) and remove it. Insert the new bulb with into slots (3). Push bulb up and turr in direction (2). Replace cover. Caution: Use a 15 watt bulb only. Cleaning thread tensions Flip the tension cover down. Use the brush provided with the accE sories to remove dust and lint from il discs. Close the tension cover.
Always clean the machine dust prior to oiling. Use only one to two drops quality sewing machine oil indicated (Fig. 1). Since the bushings are oil they need to be oiled only a month. (Fig. 2).
______ Accessories 2 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 Screwdriver Wrench Lint brush Tweezers Lower knife Fabric guide plate Edge guide Retaining screw for 7 Thread unreeling disc Needles Oil Optional accessories: (not illustrated) Blindhem foot Elastic foot Specifications Max. sewing speed Seam width Stitch length Sewing foot Lubrication Needle system Dimensions Weight 1,300 stitches/mm. 3.0-7.0 mm 1—5 mm Snap-on manual JL x 1 and DR x 1 (or 1738) (sizes 9—14) 24 x 22 x 18.5 cm approx.
roblem useS0 4achine does not 9ed material properly Sewing foot pressure on material too light Turn sewing foot pressure screw clockwise to increase pressure. Check result on each adjust ment. eedle breaks requently 1. Needle is bent Replace damaged needle with a new one. Insert new needle correctly. 2. Needle not correctly inserted 3. Fabric is pulled during sewing fhread breaks requently Machine incorrectly threaded 2. Thread knots itself 3. Thread tension too tight 1 4.
Changing the sewing feet Push lever A up slightly (Fig. 1), and the presser foot will snap out. Place the rolled hem foot under the presser foot holder so that crosspiece B of the rolled hem foot engages in groove C of the holder (Fig. 2). Push the presser foot lever down and with the other hand gently push lever A up until the foot snaps on.
