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9 mm from throat plate '13' surface) where presser bar lifter '11' will drop down from Its raised position when presser bat is lifted a little higher than its normal up position Then firmly tighten the lock nut. When knee lifter knee plate '5' is pushed In the direction indicated with arrow 'B', the presser foot '12' will rise and when knee plate '5' is released, presser foot '12' will be lowered. Caution: • Switch off the machine. • Set sewing head uprign cgain using both hands. • Danger of crushing be^wse" Sewing head and table top Instruction Manual and Parts List Figure 34 -27- Zigzag Sewing Machine Instruction Manual and Parts List Knee operating stitch width control: Bell cranks '1' and '2' shown In Figure 35 are fastened to the underside of the bed. Bell crank T is used for lifting and lowering the presser foot with knee and bell crank '2' is used for controlling the stitch width. To control the stitch width with knee, loosen screw '4' holding the knee lifter shaft arm '3' and move knee lifter shaft arm '3' just under the bell crank '2' and firmly tighten screw '4'. Loosen the lock nut holding screw '7' and turn screw '7' as required, so that the bent end '6' of knee lifter shaft arm '3' will be almost horizontal when knee lifter knee plate '5' is pushed as far as it will go in the direction indicated with arrow 'A'. Then firmly tighten the lock nut. With knee lifter shaft arm '3' set In position as described above, loosen screw '8' and move knee lifter shah arm '3' up or down as required, so that height '10' from Its bent end '6' to bracket Is 67 mm. Loosen stitch width regulating plate thumb screws '11' and '12' so that stitch width regulator '13' can be moved from zero to maximum stitch width. (20U-109 / 109C / 308: 9mm or 20U-112 / 112C: 12mm). Loosen the lock nut holding screw '14' and turn screw '14' as required, so that knee lifter knee plate '5' when pushed In the direction indicated with arrow 'B', will stop at the maximum stitch width position of stitch width regulator '13'. Then firmly tighten the lock nut. Stitch width will become wider when knee lifter knee plate '5' is pushed in the direction indicated with arrow 'B' and will become smaller when knee plate Is released. Figure 35 Caution: • Switch off the machine, • Set sewing head upright again using both hands. • Danger of crushing between sewing head and table top Zigzag Sewing Machine 3.25. Fittings for Buttonhole Stitching Instruction Manual and Parts List Buttonhole Foot T, General Purpose Throat Plate '2' and Feed Dog '3' as shown In Figure 36 are used for buttonhole stitching. C0GGÎ2 i»U-10ft’1WCQD9) COMM I70U nZ'll!C> 2 sawaa .:2&u-n»'inac,:i0»i DDSM2 .:20U.11Z'112G> Figure 36 3.26. Fittings for Hem Sewing Hemmer Foot T, Straight Stitch Throat Plate '2' and Feed Dog '3' as shown in Figure37 are used for hem sewing. 1 410182 2 3 Figure 37 Zigzag Sewing Machine 3.27. Fittings for Zipper and Cord Sewing Instruction Manual and Parts List Zipper Foot T, General Purpose '2' or Straight Stitch '3' Throat Plate and General Purpose '4' or Straight Stitch '5' Feed Dog as shown In Figure 38 are used for zipper and cord sewing. u>u%v i20u-ios'iosciJ»i sow«» 60M4Z |2QU-112)1120 W«M2 (ÎOUHA'IIÏCI i/»№ Caution: Figure 38 • Switch off the machine. 5 MUtr Zigzag Sewing Machine Instruction Manual and Parts List 4. Maintenance 4.1. Machine Head Cleaning Clean the machine periodically with a soft and dry cloth to remove the excess of dust on the machine head. Do not use any kind of lacquer thinner to wipe the surface. 4.2. Lubrication If the machine was idle for a long time, lubricate the machine according to the instructions of topics 3.4. 4.3. Safety Inspection Check periodically if all safety devices are properly Installed and adjusted. Check if all fixing and supporting screws of the machine head are adequately tighten. Check If the v-belt is not excessively worn and if it has the right tension. Check if there is no overheating in the electrical motor and check If the power cord and plug are not damaged. Zigzag Sewing Machine Instruction Manual and Parts List 5, Troubleshooting Whenever sewing difficulty is encountered, check and make adjustments as follows. Problem Possible Causes Possible Solutions Needle thread breaks 1. Is machine properly threaded? 1. Correct needle threading 2. Are thread guides or tension disc area lint-free? 2. Remove lint & fluff in bobbin case & hook 3, Is needle-thread tension too tight? 3. Adjust needle thread tension 4. Is needle bent or has a blunt point? 4. Insert new needle 5. Is needle inserted correctly? 5. Insert needle correctly 6. Is needle the correct size for thread & fabric? 6. Select proper needle size & thread 7. Is thread free of slubs & knots? 7. Remove slubs & knots Bobbin thread breaks 8. Is bobbin threading correct? 8. Correct bobbin threading 9. Is thread tangled or caught? 9. Untangle thread from bobbin case ...

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