hobbylock 4752 Instruction Manual
Parts of the hobbylock 4752 Right needle thread tension (green) Setting screw for presser foot pressure Telescoping thread guide Thread guides Left needle thread tension (blue) Thread spool pin Cone thread adapter Thread spool stand Swivel plate Setting knob for stitch length Foot control plug with power cord Foot control plug with power cord Upper looper thread tension (red) Lower looper thread tension (yellow) Looper cover Electrical power master switch Handwheel
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Simple, up-to-date sewing Congratulations! You have bought a high-quality product that provides unique advantages. Your new hobbylock 4752 can take any material in its stride and will sew through thick and thin for you. Your PFAFF hobbylock features the very latest in design and technology, and it is just as simple to operate as this instruction manual is to follow. Before you start sewing, please take the time to read these instructions carefully.
Contents Page Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Accessories, optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Accessory box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Changing a spool on a threaded machine . . . . . . . . . . . . . . . . 11 Cleaning the machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Cone thread adapter. . . . . . . . . . . . . . . . . .
Seam width, setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Securing the seam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27, 28 Sewing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Sewing light cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Sewing problems and their solutions. . . . . . . . . . . . . . . . . . . . 42, 43 Specifications . . . . . . . . . . . . . . . . . . .
Accessories lug screw driver tweezers groove waste container looper cover Attaching the waste container Guide the lug into the groove on the looper cover. thread nets thread unreeling discs needle system wrench waste container looper threading aid accessory box Storing the accessory box cleaning brush Place the accessory box in the waste container.
wall socket lead cord/plug connection socket foot control plug main switch foot control main switch Connecting the machine to the mains power supply Switch the main switch to OFF. Plug the foot control plug into the connection socket on the machine. Plug the lead cord/plug into the wall socket. Switch the main switch to ON. Notes on safety This appliance has a polarized plug (one blade wider than the other).
foot control handwheel Sewing speed Direction of rotation of the handwheel The sewing speed is regulated by activating the foot control. The further you press the foot control down, the faster the machine will sew. Always turn the handwheel towards you, as shown in the illustration (i.e. counterclockwise). swivel plate looper cover Opening and closing the swivel plate Opening and closing the looper cover Opening: press the swivel plate towards the left.
telescoping thread guide thread guides standard presser foot stops spool pin presser foot lifter Telescoping thread guide Presser foot lifter Pull the telescoping thread guide upward to its highest position. The presser foot can be raised and lowered using the presser foot lifter. The two upper telescopes must be rotated slowly until their locking balls are heard to lock into place. The presser foot must always be lowered when the machine is used.
Threading the machine left needle thread right needle thread upper looper thread thread guides lower looper thread thread guide plate 10
Before the machine leaves the factory, threads are already threaded and their ends are cut off. Tie one of these thread ends to the thread from a spool with an overhand knot, raise the presser foot and pull the new threads through the loopers. In order to thread the needle threads, pull the thread ends through until the knots reach the needle eye. Cut the threads on both sides of the knots. Rethread the eye of the needle with the needle threading aid (see Pages 16, 18).
Threading the upper looper (red) Open the looper cover and the swivel plate. Place the spool on the second spool pin from the right. The guide points for the upper looper thread are marked in red. Two threading diagrams are located behind the looper cover to help you with the threading. guide (3) for the upper looper thread thread guides Guide the thread from the rear through the second thread guide from the right.
Guide the thread through from the right between the tension discs and pull the thread tight from both sides. Feed the thread into the guide (5) for the upper looper thread. guide (5) for the upper looper thread thread tensioner of the upper looper thread Feed the thread into the guide (6) for the upper looper thread. Guide the thread into the take-up lever (7) of the upper looper thread.
Threading the lower looper (yellow) Open the looper cover and the swivel plate. Place the spool on the second spool pin. The guide points for the lower looper thread are marked in yellow. Two threading diagrams are located behind the looper cover to help you with the threading. thread guide (1) guide (3) for the lower looper thread guide plate (2) Guide the thread from the rear through the right thread guide (1).
guide (9) for the lower looper thread guide (5) for the lower looper thread thread tensioner of the lower looper thread Guide the thread through from the right between the tension discs and pull the thread tight from both sides. Feed the thread into the guide (5) for the lower looper thread. guide (8) for the lower looper thread guide (6) for the lower looper thread take-up lever (7) of the lower looper thread Feed the thread into the guide (6) for the lower looper thread.
Threading the left needle (blue) Place the spool on the left spool pin. The guide points for the left needle thread are marked in blue. Two threading diagrams are located behind the looper cover to help you with the threading. Guide the thread from the rear through the left thread guide (1) and both the left holes on the thread guide plate (2).
Threading the right needle (green) Place the spool on the second spool pin from the left. The guide points for the right needle thread are marked in green. Two threading diagrams are located behind the looper cover to help you with the threading. Guide the thread from the rear through the second thread guide (1) from the left. Guide the thread through the fourth and the third hole from the left on the thread guide plate (2).
guide (6 for the needle thread Feed the thread from the left to the right into the right guide (6) for the needle thread. Feed the thread from the left to the right into the thread guide (7). thread guide (7) Important note on threading The needle(s) must always be threaded last so that the needle threads do not run under the looper thread as seen in drawing 1, but instead over the looper thread as depicted in drawing 2. Should this sequence not be followed, thread breakage or skipped stitches can occur.
(A) the right seam width (B) Setting the seam width Set the seam width as follows: 1. Switch the main switch to OFF and pull out the lead cord/plug. 2. Open the looper cover and the swivel plate. 3. Move the upper blade to its lower position (see Page 24). 4. Adjust the setting knob until the lower blade is in the desired position. (A) The seam width is too small - there are extra loops. Turn the setting knob clockwise. The lower blade moves to the right.
Setting the stitch length stitch length setting knob setting mark Turn the stitch length setting knob in such a way that the desired stitch length is indicated at the setting mark. The higher the number, the longer the stitch. The stitch length can be adjusted between 1 and 5 mm. The setting R is used for sewing rolled hems.
Presser foot pressure Standard setting The presser foot pressure does not need to be adjusted for most fabrics. If you are working with light or heavy fabrics then you may need to adjust the pressure.
fastening screw for the left needle fastening screw for the right needle Do not use bent or blunt needles. Changing the needle Switch the main switch to OFF. Move the needle(s) to the highest position. Loosen the fastening screw of the needle that is to be changed. Needle system HA X 1SP (130/705 H-PS) is required for this machine.
Use of the right needle only (for 3-thread seams with a narrow seam width) Turn the machine off. Remove the left needle and the left needle thread. Tighten the left needle fastening screw again slightly so it does not fall out. Use of the left needle only (for 3-thread seams with a wide seam width) Turn the machine off. Remove the right needle and the right needle thread. Tighten the right needle fastening screw again slightly so it does not fall out.
Disengaging the upper blade Turn the machine off. ridged knob for lowering the upper blade blocking pin – Open the looper cover and the swivel plate. – Push the ridged knob for lowering the upper blade to the right and turn it towards you. Guide the upper blade over the blocking pin so that the upper blade engages in its lower position. – Close the looper cover and the swivel plate. upper blade Engaging the upper blade Turn the machine off.
stitch width latch Setting the stitch width latch (for standard overlock seams or rolled hems) Switch the main switch to OFF. – Open the looper cover and the swivel plate. – Disengage the upper blade (see Page 24). – Press the stitch width setting knob towards the right and push the bed slide of the stitch width latch to the setting mark S (standard) or R (rolled hem). Then release the setting knob again slowly. setting marks setting knob – Move the upper blade to its upper position.
Starting sewing Using the seam guidelines Lay the sewing material under the front of the presser foot (it is not necessary to raise the presser foot). Turn the handwheel carefully a few revolutions towards you and check the thread chain. Start sewing slowly. The sewing material is fed automatically. Guide the sewing material in the desired direction. On the top side of the looper cover, you will find seam guidelines which indicate the distance from the needles.
A Securing the seam ends Leave a thread chain of approx. 5 cm (2”) in length extending at the beginning and the end of the seam to prevent the seam from coming undone. Secure the thread chain at the beginning and end of the seam using one of the following methods. B Thread the thread chain into a needle with a large eye and pull the thread chain into the overlock stitches of the sewing fabric. Separate the individual thread ends and knot them together. C Stitching the beginning of the seam 1.
Stitching the end of the seam 1. Sew 2-3 stitches off the end of your fabric. 2. Turn the needles to their highest position and raise the presser foot. 3. Flip the fabric over so the bottom side is now on the top. Pull the fabric around so it is positioned under the presser foot and in front of the needles. Make sure the fabric is not positioned in the path of the upper blade. 5. Lower the presser foot, sew approx. 2.
Threads and needles chart Light fabrics Fabric Thread Medium-heavy fabrics heavy fabrics Knitwear organdy, georgette, batiste, crepe-de-Chine, lining fabrics cotton, linen, satin, standard fabrics tweed, upholstery fabric, denim, heavy cloth knitwear cotton: no. 80 - 100 cotton: no. 50 - 100 cotton: no. 50 - 60 cotton: no. 50 - 60 silk: no. 80 - 100 silk: no. 50 - 100 silk: no. 50 - 60 synthetic thread: no. 50 - 60 synthetic thread: synthetic thread: synthetic thread: cotton nylon + No.
Program overview Program Program 01 Program 02 Program 03 Program 04 Program 05 Program 06 Program 07 30 Application Needle position L = left R = right 3-thread overedge, narrow Serging light (easily frayed) fabrics. 3-thread overedge, wide Serging tightly woven (easily frayed) fabrics. 3-thread flatlock, narrow Serging medium-heavy fabrics. As a flatlock seam, for joining stretch fabrics and decorative finished edges. 3-thread flatlock, wide Serging medium-heavy fabrics.
Thread tension: The values refer to medium-heavy fabrics and normal polyester thread blue Position of stitch width latch green red 3 3 3 3 S 3 3 3 S 2 3 3 S 2 3 3 S 4 3 3 R R 4 3 8–9 R R 3 3 3 3 S 3 0 0 3 Stitch length yellow 31
Seam pattern Top side Top side Underside Underside Stitch formation correction measures The left needle thread (blue) is too loose. 4-thread overedge seam (program 07) Set the blue thread tension to a higher value. blue green red 3 3 3 yellow 3 When all tensions are correctly set, the loops of both looper threads are directly on the edge of the fabric. Top side Top side Underside Underside The upper looper thread (red) appears on the underside of the fabric.
Seam pattern Top side Top side Underside Underside The needle thread is too loose. 3-thread overedge seam (progr. 01, 02) wide narrow blue green 3 blue red yellow 3 green red 3 3 Set the relevant needle thread tension to a higher value. 3 yellow 3 Top side Top side Underside Underside The upper looper thread (red) appears on the underside of the fabric. The lower looper thread (yellow) appears on the top side of the fabric.
Seam pattern Top side Top side Underside Underside The needle thread is too tight. 3-thread flatlock seam (progr. 03, 04) wide narrow blue green 0 blue red yellow 2 Set the relevant needle thread tension to a lower value. 3 green red 0 2 yellow 3 Top side Top side Underside Underside The upper looper thread (red) appears on the underside of the fabric. The lower looper thread (yellow) is too loose. Set the red thread tension to a higher value.
Seam pattern Top side Top side Underside Underside The right needle thread (green) is too loose. 3-thread rolled hem (progr. 05) blue green red 4 3 yellow Set the green thread tension to a higher value. 3 Top side Top side Underside Underside The upper looper thread (red) appears on the underside of the fabric. The lower looper thread (yellow) appears on the top side of the fabric. Set the red thread tension to a higher value and/or the yellow thread tension to a lower value.
Seam pattern Top side Underside Underside Folded 3-thread rolled hem (progr. 06) blue Top side The right needle thread (green) is too loose. green red yellow 4 3 8–9 Set the green thread tension to a higher value. Top side Top side Underside Underside The upper looper thread (red) only partly loops around the fabric edge. The lower looper thread (yellow) appears on the top side of the fabric. Set the red thread tension to a lower value and/or the yellow thread tension to a higher value.
Optional accessories Order No. 98-200 277-10/900 1 Blindstitch foot For serging blind hems on mediumheavy and thick fabrics. 98-200 278-10 2/3 Taping attachment with tape guide 98-200 278-10 Use to protect knit and other stretchy fabric from stretching out of shape when you sew a shoulder. 98-200 279-10/100 4 Cording foot type A For sewing on cords, elastic thread and fishing line on the top side of the fabric and for decorative cording.
Machine maintenance Cleaning the machine Switch the main switch to OFF. Open the looper cover and swivel plate. Use the cleaning brush provided to remove any waste thread. In order to clean the upper blade and the feed dog, you may also use a vacuum cleaner. fastening screw of the needle plate Cleaning the feed dog Switch the main switch to OFF. Open the looper cover and the swivel plate. Remove the needles and the presser foot. Loosen the fastening screw of the needle plate and remove the needle plate.
Lubricating the machine Switch the main switch to OFF. Open the swivel plate. Apply a few drops of high-quality machine oil to the points marked with arrows. Oil the machine once a week for normal operation or every ten hours for continuous operation. Open the looper cover and oil the marked points. Oil the marked point on the top of the machine.
Changing the upper blade Switch the main switch to OFF. Open the looper cover and the swivel plate. lower blade hexagonhead screw Undo the hexagon-head screw of the upper blade and remove the upper blade. Insert the new upper blade into the blade holder in such a way that the blocking pin engages in the groove. Tighten the hexagonhead screw slightly. blocking pin Move the upper blade to its upper position. upper blade 0,5 - 1 mm (1/32”) Move the upper blade to its lower position (see Page 24).
Changing the light bulb Switch the main switch to OFF. Loosen the fastening screw to the sewing light cover until the cover can be removed. fastening screw sewing light cover Removing the light bulb Bayonet holder: press the lamp in and turn to the left. light bulb Inserting the light bulb Bayonet holder: press the lamp in and turn to the right. Replace the sewing lamp cover and tighten the fastening screw. to insert to remove Safety notes Only use bulbs with a maximum output of 15 Watt.
Sewing problems and their solutions This machine has been developed with ease of operation in mind. No difficult or tricky settings need to be made. Sewing problems of the kind described below may occur as a result of minor adjustment and operating errors. They can be easily adjusted by following the instructions. Problem Cause Solution Needle breakage The needle was bent or the point damaged. Insert new needle (see Page 22). The needle was not fully inserted. Insert needle fully (see Page 22).
Problem Cause Solution Fabric not neatly trimmed Waste thread between upper and lower blade. Upper blade is blunt. Clean blades. Replace upper blade (see Page 40). Thread tension too tight. Reduce thread tension. Incorrect setting of differential feed. Re-adjust differential feed (see Page 20) Thread has caught due to incorrect threading. Thread correctly (see Pages 10 - 18). Stitches too short. Increase stitch length (see Page 20). Sewing foot pressure too low for heavy fabrics.
Specifications Maximum sewing speed Seam width Stitch length Presser foot Lubrication Presser foot height Overedge stroke Needle system Needle size Number of threads Dimensions (width x height x depth) Weight Packing contents 1 machine 1 foot control 1 instruction manual/guarantee card 1 machine cover 1 accessory box 1 waste container 44 1200 stitches/min. 3.0 mm - 6.7 mm 1.0 mm - 5.0 mm exchangeable manual 4.5 mm 2.0 mm HAx1SP (130/705 H-PS) 80/12, 90/14 3, 4 310 x 280 x 270 mm 7.
Notes 45
Notes 46
Notes 47
Parts of the hobbylock 4752 Movable upper blade Upper overedge looper (red) Lower overedge looper (yellow) Fixed lower blade Standard presser foot Thread chain cutter Presser foot lifter Needle plate Ridged knob for lowering the upper blade Setting knob for seam width Bed slide for stitch width latch
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