Assessments - 4, GPA: 3.8
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Adjustment is necessary only when you work on very thin or very thick materials. thinner materials with less Accordingly, sew pressure and thicker materials with more pressure. presser foot by Increase the pressure of the tightening the adjustment screw. \— —11— 4-5. Thread Tension Chart ‘N.N. THREAD N TENSION N.. PATTERN’N STITCHES Left Needle II1C>IH [LJ Right Needle t>Il4I LJ Upper Looper 1II II! Lower Loope [J STITCH LENGTH CUTTING WIDTH OVERLOCK 4 4 4 4 2.5-5 mm 5-6 mm ROLLED Ffl(F — 4 A 0 FINE ROLLED EDGE — 4 4 4 1-1.5 mm 5-6 mm The tension for each of the thread tension dials should be different according to the pattern stitches as in the chart above. Since the figures in the chart are for average strength of thread tension, it may be necessary to adjust the thread tension slightly. Thread tensions will differ according to the kind of fabric and the thread. The differential feed ratio is normally “N”. (See R16) —12— 8. CORDED OVERLOCK Corded overlock can be used tc strengthen and stabilize stitches when joining elastic materials such as knitted fabrics. There are two ways of corded overlock. (1) Place the narrow cord (about 3mm) into the hole in the foot and back under the foot, then sew with the right needle stitching through the cord. (2) Sew over a narrow cord, positioning it on the edge of the overlocked stitch. 9. SEWiNG FOR CURVED SEAMS For a neat and clean finish of curved seams: For inside curves, guide the fabric gently with the trimming line of the fabric under the right front of the presser foot, applying pressure to the fabric with your left hand, at the same time, apply a little pressure in the opposite direction with your right hand to hold it against the cutter as shown. For outside curves, apply pressure in the opposite directions of the above. —17— 11. ROLLED EDGE Fine Rolled Edge 4 / The fabric is overlocked with upper and lower The fabric is rolled by adjusting. looper thread. The thread tension and is overlocked withupper looper thread. Rolled edge is achieved by rolling the fabric and 7. ideal for use with thin materials. (1) Remove the left needle. (Sew only with the right needle> 1q (2) Pull stitch finger knob toward you to align it with front red line on needle plate. STANDARD CHART FOR ROLLED EDGE ROLLED FINE ROLLEDGE ED EDGE 7. CUTflNG WIDTH 5-6 mm 5-6 mm STITCH LENGTH 1-1.5 mm 1-1.5 mm DIFFERENTIAL FEED RATIO NN NEEDLE THREAD 3-5 3- 5 THREAD UPPER LOOPER TENSION THREAD 3 5 LOWER LOOPERTHREAD - + Adjust as needed according to the kind of A the fabric and the threads. (See P24) \__ (3) At the beginning of sewing, gently pull theend of the thread chain. —19— 13. REPLACING LOWER CUTTER Replacing Lower Cutter * Unplug the machine (1) Open front cover and disengage upper cutter. (‘See page 3) (2) Loosen lower cutter clamp screw®and remove lower cutter. (3) Set the new lower cutter. Align the top of lower cutter with the top of needle plate, and tighten lower cutter clamp screw a 14. CHANGING LIGHT BULB When the light does not come on even though it is switched on: How to remove the lamp cover. (1) Take out the power supply plug. (2) Remove the presser foot lifter by pulling it out. (3) Remove the lamp cover. (4) Change the light bulb. (5) Replace the lamp cover. How to use the bulb catcher (plastic sheath), (1) Take out the power supply plug. (2) Place the bulb catcher (plastic sheath) found in the accessory box around the bulb in the direction of arrow turn it in the direction , of arrow ©, and remove the bulb. (3) Replace the new bulb in the reverse steps of (2). 15. LUBRICATION Although Lubrication is not required often for this machine since the important parts are all made of a special oil impregnated sintered metal, one or two drops of oil on moving metal parts will increase durability. F a —21— CLEANING First disconnect machine from power supply byremoving plug from the electric outlet. 1. Open front cover and side cover. (See Page 3) 2. Using the brush provided, remove all the dust and lint that has accumulated. STORAGE 1. When the machine is not in use, please disconnect it from the power supply by removing plug from the electric outlet. 2. Using the vinyl cover provided please cover your machine when you finish your sewing. 3. Store away from bright and damp places. SERVICING are to h Hdrd +- ...‘........ . ..J machine was purchased. 17. TABLE OF SEWING MATERIALS, NEEDLES AND THREADS Thin material Medium to thick Thick material (crepe, georgette) material (thick denim) (Serge, gabardine, etcj HA xl Needle (SCHMETZ #11 #11 #14 #14 130/705 H) (75) (75) or (90) (90) (For home-use sewing machine) #60/2 Twisted thread #60/2 Twisted thread #50/2 Twisted thread —#80/2 twisted thread -—60/2 twisted thread Thread (#80/3 Twisted thread (Three or four-thread (Three or four-thread — #100/3 twisted thread) overlock stitch) overlock stitch) (Three-thread overlockstitch) Thread tension Loose Medium Tight (Set the balance of looper tensions weak) (Needle thread) Overedging width 5.2—5....
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