Mitsubishi Electric LT2-2220-B0B Instruction Manual Download Page 1 | Manualshive

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A180E126P03

INSTRUCTION MANUAL

DOUBLE-NEEDLE LOCKSTITCH NEEDLE-FEED
INDUSTRIAL SEWING MACHINE

LT2-2220-B0B

MODEL

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Summary of Contents for LT2-2220-B0B

Page 1: ...A180E126P03 INSTRUCTION MANUAL DOUBLE NEEDLE LOCKSTITCH NEEDLE FEED INDUSTRIAL SEWING MACHINE LT2 2220 B0B MODEL ...

Page 2: ...an oil sump never operate the machine without filling oil in it 2 If the machine is lubricated by a drop oiler never operate the machine without lubricating 3 When a new sewing machine is operated verify the rotational direction of the pulley with the power on The pulley should rotate counterclockwise when viewed from the pulley 4 Verify voltage and single or three phase indicated on the nameplate...

Page 3: ...6 8 Threading of bobbin threads 7 9 Adjustment of bobbin threads tension 7 Adjustment of needle threads tension 7 A Adjustment of the thread take up spring 7 B Timing between the rotating hook motion and the needle motion 8 C Adjustment of the presser foot pressure 9 D Adjustment of the feed dog height 10 E Relationship between the rotating hook motion and the thread take up lever motion 11 F Rela...

Page 4: ...bishi Refer MC70M Specific gravity 15 0 86 g cm3 Viscosity 40 10 9 mm2 s 2 Lubrication 2 When a new sewing machine is used for the first time or sewing machine left out of use for considerably long time is used again replenish a suitable amount of oil to the portions indicated by arrows in the below figure Oil level mark Amount of oil 5 6 drops 1 From the library of Superior Sewing Machine Supply ...

Page 5: ...he motor side for safety 6 Precaution on operation 1 When the power is turned on or off keep foot away from the pedal 2 It should be noted that the brake may not work when the power is interrupted or power failure occurs during sewing machine operation 3 Since dust in the control box might cause malfunction or control troubles be sure to keep the control box cover close during operation 4 Do not a...

Page 6: ...r foot lifted Adjustment Tension of wound thread Slack winding is recommended for polyester thread and nylon thread Conically wound thread Move the thread guide toward smaller diameter of wound thread layer Amount of wound thread Loosen the winding amount adjustment screw to decrease thread winding amount and tighten the screw to increase thread winding amount Winding tension adjustment nut Even w...

Page 7: ...etc is used Pass the thread through thread guide B as well 2 With the thread take up lever located at the upper most position pass each needle thread in the order shown in the following figure HOW TO USE R1 L1 R2 R3 R4 R5 L2 L3 L4 L5 R6 L6 R7 R8 L8 L7 R9 L9 R10 L10 R11 L11 R12 R13 R14 L12 L13 L14 A B A A B Note When needles of small gauge 11 or less are used each needle thread should be wound abou...

Page 8: ...strong about 500gf or more the right thread may be released from the thread tension disc In this case thread only the right thread as shown in the figure keep the left thread standard Pin Needle thread right HOW TO USE 5 From the library of Superior Sewing Machine Supply LLC www supsew com ...

Page 9: ...ength setting dial Reverse sewing lever 6 Adjustment of the needle thread guide Adjust the needle thread guide of the needle thread tension adjuster according to the fabric the thread and sewing condition 7 Setting of bobbins 1 Pull out 5 cm thread tail from bobbins 2 Put bobbins into hooks in the direction as the following figure Needle thread guide position Left side Center Right side Fabric Hea...

Page 10: ...ake up spring 1 Adjusting movable range of the thread take up spring 1 To adjust the thread take up spring for the left thread loosen the stopper stop screw and move the stopper 2 To adjust the thread take up spring for the right thread loosen the stopper stop screw and move the stopper 2 Adjusting intensity of the thread take up spring 1 Left thread Loosen the lock nut and remove the face plate L...

Page 11: ...saddle hook position so that the gap between the tip of the hook and the scarf of the needle is 0 05 mm or lower 6 Tighten screws Ⓐ Ⓑ Note Be careful not to overtighten screws Ⓑ 7 Have a small gap between the large gear and the saddle hook and tighten all set screws Ⓒ 8 Lift the needle bar 2 4 mm from the lowest position again and adjust the tip of the hook position so that it is in the center of ...

Page 12: ...edle bar clamp screw and vertically move the needle bar to adjust 2 After adjustment fully tighten the screw C Adjustment of the presser foot pressure 1 Adjust the presser foot pressure by loosening the nut and turning the pressure adjusting screw 2 After adjustment fully tighten the nut Needle bar Needle bar clamp Screw Pressure adjusting screw Nut Heavy fabric Strengthen Light fabric Weaken 9 Fr...

Page 13: ... is too small The feed dog height is the position where the needle is at the top position Adjustment of the feed dog height 1 Lean the machine head backward 2 Turn the pulley by hand and stop it at the position where the feed dog rises to the maximum height 3 Loosen the feed bar screw 4 Vertically move the feed bar in the direction indicated by the arrow in the figure to adjust it to an adequate h...

Page 14: ...ward and check that the arrow timing mark put on the timing belt is aligned with the black line on the boss of lower shaft bearing 3 If the timing mark is not in line with the black line remove the timing belt and install it again to adjust F Relationship between the rotating hook motion and the opener motion 1 Turn the pulley by your hand and stop it at the position where the opener holder is loc...

Page 15: ... with the link at a right angle as shown in the figure 7 If the connection is not a right angle remove the Rear cover loosen screw Ⓒ and move the link to connect the needle bar rock shaft crank with the link at a right angle 8 After adjusting fully tighten all screws Ⓐ Ⓑ Ⓒ At this time check that the needle enters the hole at center of the feed dog Link Needle bar Pressure bar Feed rock shaft cran...

Page 16: ... I Adjustment of forward backward feed length The forward backward feed length can be adjusted by moving the eccentric pin as shown in the figure 1 Loosen the reverse stitch shaft crank screw 2 To increase forward stitch length turn the eccentric pin clockwise To increase backward stitch length turn the eccentric pin counterclockwise Note Please adjust in the range where the mark point of the ecce...

Page 17: ...zontal rotating hook Large Lubrication system Automatic lubrication Bed dimensions mm 517 178 Needle gauge mm Standard 6 4 Special 3 2 4 8 8 9 5 12 7 Note The bobbin should be of high quality free from deformation Some materials gauge sizes and or sewing conditions may require specifications other than those listed above These specifications are subject to change for machine improvement SPECIFICAT...

Page 18: ...From the library of Superior Sewing Machine Supply LLC www supsew com ...

Page 19: ...From the library of Superior Sewing Machine Supply LLC www supsew com ...

Page 20: ...Printed in Japan From the library of Superior Sewing Machine Supply LLC www supsew com ...

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