Necchi L234A Instruction Manual
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Necchi L234A Instruction Manual

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Instruction Manual
L234A
I

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Summary of Contents for Necchi L234A

  • Page 1 Instruction Manual L234A...
  • Page 3 Important safety instructions DANGER - To reduce the risk of electric shock: When using an electrical appliance, basic safety should always be followed, including the following: Read all instructions before using this sewing machine. 1. An appliance should never be left unattended when plugged in. 2.
  • Page 4 14. Never place anything on the pedal. 15. Never use the machine if the air vents are blocked, keep the air vents of the machine and the foot pedal free from dust, fusel and leftovers. 16. The machine must only be used with designated foot controller, in order to avoid a hazard.

  • Page 5: Table Of Contents

    Contents Machine Introduction Principal parts of the machine .................. 1 Front and side of machine ...................... 1 Accessories ........................ 2 Inside of machine ........................2 Connecting machine to power source ..............3 Polarized plug information ...................... 3 Foot control ..........................3 Setting up the telescopic thread stand ..............4 Open and close the front cover .................
  • Page 6 Sewing Basics Sewing ........................30 Changing thread ........................30 Start sewing ......................... 31 Rolled edge sewing ......................33 Flatlock sewing ........................34 Maintenance And Trouble Shooting Machine maintenance ....................37 Replacing the lower cutter ....................38 Replacing the upper cutter ....................39 Trouble shooting guide ....................

  • Page 7: Machine Introduction

    Machine Introduction...

  • Page 8: Principal Parts Of The Machine

    Principal parts of the machine v Front and side of machine 9 10 11 12 1. Telescopic thread stand 2. Spool pin 3. Cone holder 4. Spool stand 5. Flat bed extension 6. Differential feed dial 7. Stitch length dial 8. Upper cutter on/ off switch 9. Left needle thread tension dial (purple) 10.

  • Page 9: Accessories

    v Inside of machine 26. Upper cutter 27. Lower cutter 28. Stitch finger 29. Lower looper threader 30. Lower looper 31. Upper looper 32. Upper looper thread guides 33. Lower looper thread guides Accessories 1. Needle pack including two needles, size #14/90 2.

  • Page 10: Connecting Machine To Power Source

    Connecting machine to power source Note Among the accessories you will find the power cord and the foot control. n Attention Unplug the power cord when the machine is not in use. Before connecting the power supply, make sure that the voltage and frequency shown on the rating plate is conforming with your mains power.

  • Page 11: Setting Up The Telescopic Thread Stand

    Setting up the telescopic thread stand Extend the telescopic thread stand to its full height, then turn until it clicks into place. Place the thread spools or cones over the cone holders on the spool pin. If the machine is already threaded, straighten the threads to prevent tangling.

  • Page 12: Remove And Replace The Flat Bed Extension

    Remove and replace the flat bed extension v Free arm sewing For free arm sewing, slide off the flat bed extension. The free arm makes it easier to sew small items and hard to reach areas such as armholes and overcasting trouser cuffs. v Remove the flat bed extension Insert a finger in the slot on the left side of the flat bed extension. Slide the flat bed extension to the left and remove it from the machine. v Replace the flat bed extension Align the projections on the flat bed extension with the grooves on the free arm and slide it...

  • Page 13: Changing The Needles

    Changing the needles n Attention Turn off the main power switch and unplug the machine. 1. Turn the hand wheel toward you until the needles are at the highest position. 2. Loosen, but do not remove the left or right needle clamp screw with the allen key while you are holding the needles.

  • Page 14: Changing The Presser Foot

    Changing the presser foot n Attention Turn off the main power switch and unplug the machine. 1. Raise the presser foot. 2. Turn the hand wheel toward you until the needles are in the highest position. 3. Push the black button on the back of the presser foot holder, and the foot will come off.

  • Page 15: Attach The 2-Thread Overlock Converter

    Attach the 2–thread overlock converter Note 2-thread overlock stitches are sewn using one needle thread and the lower looper thread. Before sewing, the two-thread converter must be attached to the upper looper, so the machine will sew with only two threads. Open the front cover.

  • Page 16: Machine Settings

    Machine Settings...

  • Page 17: Getting Ready To Sew

    Getting ready to sew v General threading information A color coded diagram is located inside the front cover for quick reference (see illustration to the right). Always start threading the loopers and then the needles from left to right (follow the order listed below). 1. Upper looper - Red 2. Lower looper - Yellow 3.

  • Page 18: Threading The Upper Looper (Red)

    v Threading the upper looper (red) When threading the upper looper, follow the thread path marked with a red dot. Open the front cover. Raise the needle to highest position by turning the hand wheel toward you. Raise the presser foot. Pass the thread from back to front through the thread guide on the thread stand.

  • Page 19: Threading The Lower Looper (Yellow)

    v Threading the lower looper (yellow) When threading the lower looper, follow the thread path marked with a yellow dot. Pass the thread from back to front through the thread guide on the thread stand. Use the tweezers to make the threading easier. Telescopic thread stand Pull the thread from right to left under the upper thread guide at the back on the top...
  • Page 20 Hold the thread end with your left hand. Use the tweezers to place the thread behind the fingers of the lower looper threader. Pull the lever on the lower looper threader gently upwards as far as it will go. Release the lever and the lower looper becomes fully threaded.

  • Page 21: Threading The Left Needle (Purple)

    v Threading the left needle (purple) Pass the thread from back to front through the thread guide on the thread stand. Use the tweezers to make the threading easier. Telescopic thread stand Pull the thread from right to left under the upper thread guide at the back on the top cover.

  • Page 22: Threading The Right Needle (Green)

    v Threading the right needle (green) Pass the thread from back to front through the thread guide on the thread stand. Use the tweezers to make the threading easier. Telescopic thread stand Pull the thread from right to left under the upper thread guide at the back on the top cover.

  • Page 23: Waste Collector

    Waste collector v Install the waste collector Align the projection on the waste collector with the groove bottom of the cutting width lever and slide it until snaps into place. Projection of the waste collector When sewing, the fabric scrap will fall along the front cover into the waste collector.

  • Page 24: Thread Tension

    Thread tension Basic thread tension setting: "4" To increase the tension, turn the dial to the next number up. To reduce the tension, turn the dial to the next number down. Proper setting of tension is important to good sewing. There is no single tension setting appropriate for all the stitch functions and fabrics.
  • Page 25 Lower looper thread is too tight The lower looper thread is unbalanced when it is pulling on the wrong side of the fabric. Loosen the thread tension of the lower looper or tighten the thread tension of the upper looper. Left needle thread is too loose If the left needle thread is too loose, tighten the thread tension of the left needle or loosen...

  • Page 26: Differential Feed Adjustment

    Differential feed adjustment The differential feed system consists of two sets of feed teeth arranged one behind the other. Both feed teeth work independently of each other to provide good results when sewing on speciality fabrics. When the amount of feed by the front feed teeth is changed in relation to the feed by the rear feed teeth it will "stretch"...

  • Page 27: Presser Foot Pressure Adjustment

    Presser foot pressure adjustment The presser foot pressure is pre-set for sewing on medium weight fabric. When sewing in different fabric weights, adjustment might be needed. Generally, decrease the presser foot pressure when sewing in light weight fabric and increase it when sewing in heavy weight fabrics. Always test sew on a sample of your fabric before sewing on your project.

  • Page 28: Stitch Width Settings

    Stitch width settings The stitch width can be increased or decreased by changing the needle position or with the cutting width lever. Width adjustment by changing needle position When only the left needle, or when both needles are used the stitch width is approx. 6mm (1/4").

  • Page 29: Stitch Finger Lever Setting

    Stitch finger lever setting The stitch finger lever should be set to "N" (Normal) for all standard overlock sewing. To sew rolled edge you need to retract the stitch finger by setting the stitch finger lever to "R" (Rolled Edge). When moving the stitch finger, be sure to push the lever as far as it will go in each direction.

  • Page 30: Stitch Chart

    Stitch Chart...

  • Page 31: Stitch Chart

    Stitch chart On your overlock machine, different stitches are obtained by combining different needle positions, threading methods, tension settings, and the use of the 2-thread overlock converter. v Stitch overview The settings shown in the table below are our recommendations based on normal conditions. It may be necessary to adjust the thread tension depending on the stitch, type of fabric and thread you are using. For best results make tension adjustments in small increments of no greater than half a number at a time.
  • Page 32 4–Thread overlock For all seams where stretch or give is needed, such as neck edges, side seams, sleeves, etc. Thread Tension Stitch/Fabric Both Both Both Both Both Both 3–Thread overlock, wide (and narrow) For sewing two layers of stretchy fabric or overcasting a single layer of light to medium fabric. Use heavier threads in the loopers to create decorative edges. Note Use the right needle instead for a narrow stitch. Recommended thread tension settings within brackets in the chart.
  • Page 33 3–Thread narrow edge For sewing stretchy fabric or overcasting a single layer of light fabric. Popular for creating decorative tucks. Use decorative threads, such as 40 weight rayon, in the loopers and regular thread in the needle. Use different colors in the loopers to get an interesting effect. Note Not recommended for heavy weight fabrics. Thread Tension Stitch/Fabric Right 1-1.5 Right 1-1.5 Right 1-1.5 3–Thread flatlock, wide (and narrow) For sewing fabrics together with a decorative effect either with the flatlock side or the ladder stitch side. Create varying effects by threading the loopers with decorative thread, such as 40 weight rayon.
  • Page 34 3–Thread rolled edge For edging lightweight fabrics. It gives a nice finish on silky scarves, pillow ruffles and napkins. For a beautiful rolled edge, thread the loopers with a decorative lightweight thread, such as 40 weight rayon, for a beautiful satin edge and the needle and lower looper with lightweight regular thread. Note Not recommended for heavy weight fabrics. Thread Tension Stitch/Fabric Right 1-1.5 Right 1-1.5 Right 1-1.5 2–Thread overedge, wide (and narrow) For overcasting a single layer of light to medium weight fabrics (2-thread overlock converter required).
  • Page 35 2–Thread wrapped overlock, wide (and narrow) Gives a beautiful finish to lightweight fabrics (2-thread overlock converter required). Note Use the right needle instead for a narrow stitch. Recommended cut width and thread tension settings within brackets in the chart. Thread Tension Stitch/Fabric Left 1.0 4-5 (5-6) N 4-6 (-) (5-7) (-) 1-3 (4-6) Left 1.0 4-5 (5-6) N...

  • Page 36: Sewing Basics

    Sewing Basics...

  • Page 37: Sewing

    Sewing v Changing thread The following is an easy way to change threads: 1. Cut the thread in near the spool, behind the guides on the telescopic thread stand. 2. Remove the thread spool and place the new thread on the spool pin. 3.

  • Page 38: Start Sewing

    v Start sewing 1. When the machine is completely threaded, close the front cover and bring all of the threads over the stitch plate and slightly to the left under the presser foot. 2. Hold the threads and apply a slight tension.
  • Page 39 Pin placement Insert straight pins to the left of the presser foot. The pins will be easy to remove and are away from the cutters. n Warning Sewing over pins will damage and might destroy the edge of the cutters. Securing thread chain 1.

  • Page 40: Rolled Edge Sewing

    v Rolled edge sewing The rolled edge stitch is appropriate for light weight fabrics such as lawn, voile, organdy, crepe, etc. The rolled edge is achieved by adjusting the thread tension to make the fabric edge roll under the fabric while overlocking. Adjust the thread tension to change the degree of rolling.

  • Page 41: Flatlock Sewing

    v Flatlock sewing A flatlock (a) is made by adjusting the tension of the 3-thread overlock stitch, sewing the seam and pulling the fabrics apart to flatten the seam. The tensions must be adjusted correctly for the fabric to pull flat properly. A flatlock can be used both as a decorative construction stitch, sewing two pieces together (standard flatlock), or for decoration only on one piece of fabric (decorative flatlock). There are two ways to sew a flatlock. Either with the wrong sides of the fabric together to create a decorative look, or with the right sides together, to create a ladder stitch.
  • Page 42 Ladder stitch (D) A ladder stitch is a flatlock stitch but sewn with the right sides of the fabric together. The needle thread will be the prominent thread that creates the ladder.

  • Page 43: Maintenance And Trouble Shooting

    Maintenance And Trouble Shooting...

  • Page 44: Machine Maintenance

    Machine maintenance An overlock requires more frequent maintenance than a conventional sewing machine for two reasons: A lot of lint is produced when the cutters are cutting the fabric. An overlock runs at a very high speed and needs to be oiled frequently to lubricate the internal working parts.

  • Page 45: Replacing The Lower Cutter

    v Replacing the lower cutter n Attention Turn off the main power switch and unplug the machine. The stationary lower cutter should be changed when it becomes blunt. Change it by following the below instructions. If you are having any difficulties, consult your service agent to make the necessary adjustments. Turn off the upper cutter. Open the front cover. Loosen the lower cutter set screw and remove the stationary cutter.

  • Page 46: Replacing The Upper Cutter

    v Replacing the upper cutter n Attention Turn off the main power switch and unplug the machine. The upper cutter should be changed when it becomes blunt. Change it by following the below instructions. If you are having any difficulties, consult your service agent to make the necessary adjustments. Place the upper cutter in its lowest position.

  • Page 47: Trouble Shooting Guide

    Trouble shooting guide Before calling for service, check the following items. If the problem still persists, contact the place of purchase or your nearest authorized dealer. Problem Cause Correction Reference 1. Machine not properly 1. Check that machine has been Machine connected to power source.
  • Page 48 Problem Cause Correction Reference 3. Needle may not be the correct 3. Use a needle size that is size for the fabric being sewn. compatible for the fabric. 4. Machine may not be threaded 4. Check that machine is correctly or threads were threaded in correct order as Stitches threaded in the incorrect...

  • Page 49: Technical Specifications

    v Technical specifications Sewing speed Stitch length Needle bar stroke Maximum 1200 ± 100 rpm 1–4mm 25 ± 3mm Stitch width Needles Presser foot rise 2.3–7mm #90/14 5–7mm Number of needles Differential feed ratio Weight 1–2 0.7–2.0 6.3kg Number of threads Type of lamp Machine dimensions 2–4...
  • Page 52 Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being. When replacing old appliances with new ones, the retailer is legally obligated to take back your old appliance for disposal at least for free of charge.

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