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SM 7820 MC Inseam sewing machine OPERATING INSTRUCTION MANUAL Rev 201901...
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Thank you very much for your choice of this double thread side seam sewing machine. Please read the manual carefully before use! Main Warnings: ❤ It is extremely important that the electrical device must be soundly earthed! ❤ It is absolutely forbidden to remove any protection system provided by manufacturer while machine is on! ❤...
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CONTENTS I. Technical Specifications …………………………………………………………………1 II. Generals ……………………………………………………………………………………1 III. Operation …………………………………………………………………………………2 IV. Adjustment …………………………………………………………………………………2 1. Cam Gears ……………………………………………………………………………2 2. Adjustment of the Needle Bar…………………………………………………………2 3. Adjustment of the Clamp ……………………………………………………………3 4. Adjustment of the Needle Pitch ……………………………………………………3 5. Setting of the Needle Stopping Position ……………………………………………4 6.
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I. Technical Specifications Sewing Speed: Stepless speed regulating Stitch Length: 3 – 18 mm Stitch: Double locked Sewing Thickness: 6 – 20 mm Needle Bar Stroke: 60 mm Sewing Needle: 240# Sewing Thread: Compound thread, linen thread, cotton thread, nylon thread Motor Power: 750W/220V Single-phase Total Weight:...
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III. Operation Operators are required to get familiar with the machine. They should know the position as well as the function of each adjusting screw and grasp the essentials before operating the machine. Refer to the following steps when starting the machine. Fill the oil cup with 30# lubricant (fill the cover cup with grease) and apply some 30# lubricant to the drive shaft and the mating surface.
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M10 Nut(1) Sopport Rest pin of the clamp bar M10 Nut(2) Spring Clamping ring Stopper ring of the needle bar M8 screw M8 screw Clamp bar Slide block Needle bar Elevating fork Sopport Slide block of the clamp Clamp Sewing Needle Fig.1 Fig.2 3.Adjustment of the Clamp...
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5.Setting of the Needle Stopping Position The needle stopping position can be decided at random since the machine is driven by the electronic motor and controlled by the computer. When adjusting, loosen the set screw on the signal indicator. Then turn the handle slowly to let the needle bar to the required position. Tighten the screw after adjustment.
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Fig.No Part’s name Quantity 998-0101 998-0102 Upper cap 998-0103 Pulley gasket 998-0104 Belt pulley 998-0105 Main shaft 998-0106 Enclosing cover 998-0107 Straining ring of the main shaft 998-0108 Bevel gear 998-0109 Handle wheel 998-0110 Round net of the main shaft 7 ...
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Fig.No Part’s name Quantity 998-0202 Upper vertical axle 998-0203 No.1 cam 998-0204 Pin for the drum roller 998-0205 Drum roller 998-0206 Elevating rocker arm of the needle bar 998-0206-1 Bush for the elevating rocker arm 998-0207 Forked standard 998-0208 Pin for the elevating rocker arm 998-0209 Slide block 998-0210...
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Fig.No Part’s name Quantity 998F-0501 Flanged seat 998F-0502 Axle housing 998F-0503 Round net 998F-0504-C2 Camshaft of the shod horn 998F-0506 Sleeve of the small shoe horn 998F-0507-B Horn seat (for small shoe horn) 998F-0508-C Small shoe horn 998F-0509-C Way block of the small shoe horn 998F-0511-C Winding reel 998F-0512-C2...
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(HVP-70 for SM 7820 MC) Parameter Setting of the Motor Parameter Mode A: Press ‘P’ key to enter Parameter Mode A PARAMETER DEFAULT DESCRIPTION CODE Maximum sewing speed, Recommended speed less [001.H] than 1000RPM. Setting acceleration curve , don’t adjust is [002.PSL] recommended.
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SM 7820 MC Electrical Block Diagram Main switch BK250 220/36,6.3V 220V 6.3V Power indicator light Lighting lamp Winding Motor motor controller Pedal Thermistor Thermistor switch Main motor 100W Positioner 220V 220V Shuttle heater Bobbin heater...
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