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Merrylock 2020 Instruction Book

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INSTRUCTION BOOK
INSTRUCTION BOOK
INSTRUCTION BOOK

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  • Page 1 INSTRUCTION BOOK INSTRUCTION BOOK INSTRUCTION BOOK...
  • Page 2 PREFACE Thank you for your purchase of this Overlock Sewing Machine. This machine, that is intended for household use will provide you with excellent performance in sewing from light to heavy material (lawn to denim). Please refer to this Instruction Book for proper use and optimum service. To get the most out of your sewing machine, read the entire Instruction Book before attempting to operate the machine.

  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS When using this machine, basic safety precautions should always be followed including the following. Read all instructions before using the machine. DANGER -To reduce the risk of electric shock: * The machine should never be left unattended when plugged in. Always unplug the machine from the electric outlet immediately after using and before cleaning.
  • Page 4 * Do not use outdoors. * Do not operate where aerosol (spray) products are being used or where oxygen is being administered. * Do not allow to be used as a toy. Close attention is necessary when the machine is used by or near children.

  • Page 5: Table Of Contents

    TABLE OF CONTENTS Page Page Principal Parts............Handy Reference Chart........Accessories.............. 22. Suggested Tension Setting........Needle Information........... 1) 2-Thread Wrapped Edge Overlock....How to Open Looper Cover ........2) 2-Thread Overedge........... Principal Parts Behind Looper Cover......

  • Page 6: Principal Parts

    1. PRINCIPAL PARTS 1. Thread guides and holder 2. Handle 3. Left needle thread tension dial (orange) 4. Right needle thread tension dial (blue) 5. Upper looper thread tension dial (green) 6. Lower looper thread tension dial (red) 7. Spool pin 8.
  • Page 7 17. Presser bar lifter and tension release 18. Differential feed adjusting dial 19. Cutting width dial 20. Foot pressure adjusting dial...

  • Page 8: Accessories

    2. ACCESSORIES Accessories are contained in the accessory case 1. Screw driver (large size) 2. Knife (stationary) 3. Thread Unwinder spool cap 4. Anti-spill net 5. Oiler 6. Allen Screw driver (small) 7. Tweezers 8. Needle set 9. Brush 10. Spool holder 11.

  • Page 9: How To Open Looper Cover

    4 . HOW TO OPEN LOOPER COVER Caution: Be sure to turn off power switch. 1 Push the cover to the right as far as it will go. 2 Pull cover down toward you. Caution: Be sure looper cover is closed when sewing.

  • Page 10: Removal And Replacement Of Clean Pocket

    POLARIZED PLUG INFORMATION (FOR U.S.A. & CANADA ONLY) This appliance has a polarized plug (one blade wider than the other). To reduce the risk of electric shock, this plug is intended to fit in a polarized outlet only way. If the plug does not fit fully in the outlet, reverse the plug.

  • Page 11: Setting Up The Thread Guide Holder

    8. PREPARATION FOR THREADING Setting Up the Thread Guide Holder Take out the thread guide from the top of Styrofoam, and insert it as shown on the right illustration. This machine is shipped with the thread guide holder on the top of styrofoam. Fully extend the thread guide holder.

  • Page 12: How To Disengage Movable Upper Knife

    9. HOW TO DISENGAGE MOVABLE UPPER KNIFE Caution: Be sure to turn off power switch. To place movable knife in nonworking position Open looper cover (page 8). Pull the movable knife holder to the right as far as it will go. Turn the holder toward counter clockwise until the knife clicks into a lock position.

  • Page 13: To Convert Upper Looper To 2-Thread Converter

    10. TO CONVERT UPPER LOOPER TO 2-THREAD CONVERTER Caution: Be sure to turn off power switch When not threading the upper looper, the 2-thread converter must be engaged into the upper looper eye. To Use the 2-thread converter To engage the 2-thread converter , insert the sharp part into eye of upper looper.

  • Page 14: Standard Overedge And Rolled Hem Stitching

    11. STANDARD OVEREDGE AND ROLLED HEM STITCHING To Sew Standard Overedge Set seam width finger knob to N to move seam width finger to standard overedge sewing position. Note: Be sure to push seam width finger knob as far as it will go in the direction of setting N. To Sew Rolled Hem Set seam width finger knob to R to retract the seam width finger and set it for rolled hem.

  • Page 15: How To Remove And Insert Needles

    12. HOW TO REMOVE AND INSERT NEEDLES Overedge left needle Overedge right needle Needle Position With this machines, two needles can be inserted to the needle clamp as shown in the drawing but only one or two needles are to be used for sewing. The Instruction Book refers to different needle positions by illustrating the needle clamp at right.

  • Page 16: Threading The Machine

    13. THREADING THE MACHINE Threading Diagram: Overlock and Safety Stitches A color coded threading diagram is located inside the looper cover for quick reference. Thread the machine in the order 1 to 4 as shown at right. Note: Threads go through the take-up lever cover for Overlock as shown.

  • Page 17: To Thread The Machine Correctly

    To Thread The Machine Correctly Caution: Be sure to turn off power switch. 1) Threading the Upper Looper (Green) Thread the upper looper as indicated 1~9. Raise Presser foot to release tension discs. Pass thread from back to the front through the thread guide 1.
  • Page 18 Thread the looper area of the machine following the green color coded thread guides (4~9). Thread the hole in the upper looper from front to back 9. Note: Make sure thread passes behind lower looper. Note: Use tweezers provided in the accessory case to aid in threading the looper.
  • Page 19 While holding thread with finger, pass it between the tension discs and pull thread down to make certain it is properly located in between the tension discs 3. Turn the hand wheel toward you until the lower looper extends out 5~10mm from the throat plate edge.

  • Page 20: Threading The Overedge Right Needle (Blue)

    3) Threading the Overedge Right Needle (Blue) (B on needle clamp) Thread the right needle as indicated 1~9. Raise Presser foot to release Tension discs. Pass thread from back to the front through the thread guide 1. Thread the top cover thread guide by pulling the thread towards the left until it slips under...
  • Page 21 Continue to thread points 4~8. Note: Slip thread into the rear slot on the thread guide 5 and bottom slot of take-up lever cover 6. Then slip thread into the right slot on the thread guide 7, and into the right slot on the thread guide 8.
  • Page 22 Thread the top cover threadguide by pulling the thread towards the left until it slips under guide. Then pull thread along the right side of button as illustrated. While holding thread with fingers, pass it between the tension discs and pull thread down to make certain it is properly located in between the tension discs 3.

  • Page 23: How To Change Threads: Tie On Method

    14. HOW TO CHANGE THREADS: TIE ON METHOD To change thread type or color, clip thread near the spool. Place new thread on stand. Tie new thread and old thread ends together with a square knot. Clip thread tails to 2~3cm (1 inch) length.

  • Page 24: How To Adjust The Stitch Length

    15. HOW TO ADJUST THE STITCH LENGTH The stitch length dial should be set on the N setting for most sewing conditions. Adjust the stitch length to N~ 4 when sewing heavy weight fabrics. Adjust the stitch length to 2~N when sewing lightweight fabrics to obtain excellent seams without puckering.

  • Page 25: How To Adjust The Presser Foot Pressure

    Width adjustment knob As shown on the illustration, turn the dial counter clockwise to increase width of cutting, and clockwise to decrease width of cutting. 17. HOW TO ADJUST THE PRESSER FOOT PRESSURE The presser foot pressure of this machine is pre-adjusted at the factory to suit the sewing of medium weight fabrics.

  • Page 26: Differential Feed

    18. DIFFERENTIAL FEED Differential feed is a system which "stretches" or "gathers" the fabric, when the amount of feed of front feed dogs in relation to the rear feed dogs is changed. The differential feed ratio ranges from 1:0.6~1:2.0. Adjustment is made by means of the differential feed adjusting dial pictured at right.

  • Page 27: Stretch Overedge

    Stretch Overedge Stretch overedge is ideal for sewing decorative collars, sleeves, skirt hems, etc. on loosely knit and woven fabrics. To set the differential feed adjusting dial for stretch Set differential feed adjusting lever knob above setting "N". To sew a seam, apply gentle tension to the fabric by holding the seam lightly in front and back of the presser foot.

  • Page 28: Chaining Off And Test Sewing

    19. CHAINING OFF AND TEST SEWING When the machine is completely threaded, bring all of the threads across the throat plate and slightly to the left under the presser foot. Hold the threads and apply a slight tension. Turn the hand wheel toward you 2 or 3 complete turns to start the thread chain.

  • Page 29: Selection Stitches

    20. SELECTION OF STITCHES This machine is capable of producing various types of stitches according to the combination of needle positions, threading methods, tension adjustment and the use of convertible right looper/ converter Stitch Type Reference Page 1. Two-thread 1-needle 2-thread stitch is used for Wrapped Edge seaming lightweight or stretch fabrics.
  • Page 30 * Depending on the needle positions used, this machine can sew 2-thread (option-2-thread converter is needed) and 3-thread standard width 4 mm overedge and a 6 mm wide overedge seams. Also, for overedging heavyweight fabrics, the seam width can be increased still more by turning the overedge seam width adjustment knob.

  • Page 31: Handy Reference Chart

    2 . HANDY REFERENCE CHART Tension Dial : Numbers shown are average settings on medium weight abric with Stitch Type Page St ndard#60 polyester spun thread Orange Blue Green 4.0mm Two - Thread Wrapped Edge Overlock 6.0mm 4.0mm Two - Thread Overedge 6.0mm 4.0mm...

  • Page 32: Suggested Tension Setting

    22. SUGGESTED TENSION SETTING 1) 2-thread Wrapped Edge Overlock NEEDLE POSITION Note: * These are suggested tension settings only. SEAM WIDTH FINGER KNOB * Tension settings are effected by; 2 ~ 4 STITCH LENGTH 1) Type and thickness of fabric CONVERTER 2) Needle size 3) Size, type and fiber content of thread...

  • Page 33: 2-Thread Overedge

    2) 2-thread Overedge NEEDLE POSITION Note: * These are suggested tension settings only. * Tension settings are effected by; SEAM WIDTH FINGER KNOB 1) Type and thickness of fabric 2) Needle size STITCH LENGTH 3) Size, type and fiber content of thread CONVERTER * See page 12 for instructions on converting upper looper to converter.

  • Page 34: 3-Thread Overlock

    3) 3-thread Overlock NEEDLE POSITION Note: * These are suggested tension settings only. * Tension settings are effected by; SEAM WIDTH FINGER KNOB 1) Type and thickness of fabric 2) Needle size STITCH LENGTH 3) Size, type and fiber content of thread CONVERTER Upper looper thread Correct Balance...

  • Page 35: 3-Thread Flatlock

    4) 3-thread Flatlock NEEDLE POSITION Note: * These are suggested tension settings only. SEAM WIDTH FINGER KNOB * Tension settings are effected by; 1) Type and thickness of fabric STITCH LENGTH 2) Needle size CONVERTER 3) Size, type and fiber content of thread Correct Balance Needle thread Needle thread...

  • Page 36: 3-Thread Ultra Stretch Mock Safety Stitch

    5) 3-thread Ultra Stretch Mock Safety Stitch Note: * These are suggested tension settings only. NEEDLE POSITION SEAM WIDTH FINGER KNOB * Tension settings are effected by; 1)Type and thickness of fabric STITCH LENGTH 2) Needle size CONVERTER 3) Size, type and fiber content of thread Right Needdle thread Correct Balance Set each tension dial to settings shown at right and...

  • Page 37: 4-Thread Ultra Stretch Mock Safely Stitch

    6) 4-thread Ultra Stretch Mock Safety Stitch Note: * These are suggested tension settings only. NEEDLE POSITION * Tension settings are effected by; SEAM WIDTH FINGER KNOB 1) Type and thickness of fabric 2) Needle size STITCH LENGTH 3) Size, type and fiber content of thread CONVERTER Upper looper thread Correct Balance...

  • Page 38: How To Sew A Rolled Hem

    23. HOW TO SEW A ROLLED HEM This machine can sew four types of rolled hems. Rolled hemming is done by rolling and overedging the fabric edge. Light weight fabrics such as lawn, voile, organdy, crepe, etc. perform the best. Rolled hemming is not suited for heavy or stiff fabrics.

  • Page 39: 3-Thread Standard Rolled Hem Stitching

    Note: For a beautiful rolled hem thread the upper looper with wooly nylon and the needle and lower looper with lightweight regular thread. NEEDLE POSITION SEAM WIDTH FINGER KNOB STITCH LENGTH Upper looper thread 1) 3-thread Standard Rolled Hem Stitching Correct Balance Needle thread Set each tension dial to settings shown at right...

  • Page 40: 2-Thread Standard Rolled Hem Stitching

    Note: For a beautiful rolled hem thread the lower looper with wooly nylon and the needle with lightweight regular thread. NEEDLE POSITION Convert upper looper to converter (See page 12) SEAM WIDTH FINGER KNOB STITCH LENGTH Lower looper thread 3) 2-thread Standard Rolled Hem Stitching Correct Balance Set each tension dial to setting shown at right and Needle thread...
  • Page 41 Additional Information About Rolled Hemming Hold the thread chain when you begin sewing to keep it from curling into the seam. Place a slight tension on the material in the sewing direction and a finer seam finish can be obtained. The minimum overedge stitch width that can be obtained for rolled hemming is approximately 1.5 mm (1/16 inch) since the cutting width cannot...

  • Page 42: Stitch Variations And Sewing Techniques

    24. STITCH VARIATIONS AND SEWING TECHNIQUES How to Sew a Flatlock Decorative Seam A flatlock stitch is achieved by adjusting the tension of the 2-thread (option) or 3-thread overlock stitch, sewing the seam, and then pulling the fabric apart to flatten the seam. The flatlock stitch can be used as a construction and decorative stitch or for ornamentation only.

  • Page 43: Decorative Flatlocking

    3) Decorative Flatlocking Place the movable upper knife in the nonworking position (page 11). The fabric is not trimmed on this stitch. Fold fabric wrong sides together. Position the fabric so the seam is sewn with part of the stitch extending off the fabric. Pull on opposite sides of the stitch to flatten.

  • Page 44: How To Sew An Overlock Blind Hem

    How to Sew an Overlock Blind Hem The excess fabric is trimmed and the hem is sewn and the raw edges are overlocked in one operation. The overlock blind hem is best suited for sewing knit wear. It provides a durable finish that is almost invisible. Use overedge right needle and adjust machine for a narrow 3-thread overlock stitch.

  • Page 45: Turning Square Corners

    Fold the fabric with the wrong sides together and sew. Press the pin tucks in the same direction. Turning Square Corners (1) Outside Corner Cutting line Cut out approximately 2cm (51/64 inch) from the corner, in line with the overedge seam edge. Sew one stitch beyond point (A) and stop.

  • Page 46: Pin Placement

    (2) Inside Corner Cut inside corner up to seam line as shown Seam line Sew along seam line. Sew up to end of fold. (Leave needle in fabric) Raise presser foot. (Leave needle in fabric) Needle position Spread fold and re-fold so that seam line is straight. Seam line Pin Placement Insert pins to the left of the presser foot.

  • Page 47: Machine Maintenance

    25. MACHINE MAINTENANCE An overlock machine requires more maintenance than a conventional machine for two reasons: 1) A lot of lint is produced due to the cutting action of the knives. 2) An overlock runs at a very high speed and needs to be oiled frequently to lubricate the internal working parts.

  • Page 48: How To Replace The Stationary Knife

    How to Replace the moveable upper Knife Danger: Before replacing the stationary knife, disconnect power line plug from the wall receptacle. The stationary knife should be changed when it becomes dull. The stationary knife can be replaced according to the directions provided, however if there are any difficulties experienced, consult your dealer representative to make the replacement.

  • Page 49: How To Exchange Light Bulb

    How to Exchange Light Bulb Danger: Always unplug before re-lamping. Light cover screw Light bulb is available at your dealer shop. Take old bulb to the dealer shop and ask for same bulb. If voltage indicated on the electrical rating plate of your machine is 120V, ask for light bulb conforming to following specification.

  • Page 50: Optional Accessories

    26. OPTIONAL ACCESSORIES The following optional presser feet specially prepared for this machine are available at extra-charge. Note: Do not use presser foot made for other machines. Use of such presser foot may result in interference with the needle and knife and can be hazardous.

  • Page 51: Optional Presser Feet

    Optional Presser Feet 1) Elastic Foot This foot is used for attaching elastic tape to the garment and the amount of contraction of the elastic tape can be adjusted as required. 2) Blind Hem Foot This foot is for sewing cuffs on knit fabrics, skirt and trouser seams where seam should not be visible.

  • Page 52: Troubleshooting Chart

    27. TROUBLESHOOTING CHART Problem Solution Page Fabric does not feed well - Lengthen stitch length. - Increase presser foot pressure for heavy weight fabric. - Decrease presser foot pressure for lightweight fabric. Needle breaks - Insert needle correctly. - Do not pull fabric while sewing. - Tighten needle set screw.

  • Page 53: Relationship Between Cloth, Thread And Need

    28. RELATIONSHIP BETWEEN CLOTH, THREAD AND NEEDLE Type of Fabric Type of Thread Needle HAx1 (130/705H) WOVEN Lightweight Lawn, Organdy, Voile, Cotton: #100 #11/80 Crepe, etc. Silk/ Rayon: #100 Spun: #80 ~ #90 Polyester: #80 ~ #100 Medium Weight Muslin, Seersucker, Satin, Cotton: #60 ~ #80 #14/90, #11/80 Gabardine, Broadcloth, etc...

  • Page 54: Specification

    29. SPECIFICATION Item Specification Sewing speed 1,300 spm maximum Stitch length (feed amount) 1~4 mm (standard: rolled hemming 1-2, ordinary overedge N=2.5) Differential feed ratio 1:0.6 ~ 1:2 (with differential feed machine) Overedge stitch width Rolled hemming 1.5 mm, ordinary overedge 3.0 ~ 7.0 mm (standard 4 mm) Needle bar stroke 27 mm...

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