Mitsubishi LT2-2230 Instruction Manual Download Page 1 | Manualshive

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From the library of: Superior Sewing Machine & Supply LLC

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Summary of Contents for LT2-2230

Page 1: ...SUBISHI INDUSTRIAI SEWING MACHINE Model LT2 2230 Classes Double Needle Needle feed Lockstitch Automatic Undertrimmer Variable Speed INSTRUCTION MANUAL From the library of Superior Sewing Machine Suppl...

Page 2: ...finger guard and or eye guard are installed do not operate the machine without these safety devices 2 Precautions before Starting Operation 1 Ifthe machine s oil pan has an oil sump never operate the...

Page 3: ...tension 9 Adjustment of presser foot pressure 9 Timing between rotating hook motion and needle motion 10 11 Adjustment of feed dog height 12 Relationship between rotating hook motion and take up leve...

Page 4: ...rall view of assembled sewing machine Arm Operation box Balance wheel Face plate Touch back switch Z type LIMI STOP motor Phase reversing plug Control box rn Power cable connection 1 1 Connectors vtyp...

Page 5: ...h near by lecated electrician or our service agency 3 The capacity of fuse inside the control box is 8A 1 4 Rotating Direction Therotating direction ofmotorcan be reversed byremovingthe rotation rever...

Page 6: ...y heel the machine stops at UP position If the marks deviate larger than 3 mm adjust as follows 1 Disconnect the plug 12 pins ofcable from the machine head 2 Runthemachineand stop at UP position 3 Whi...

Page 7: ...specified by Mitsubishi Oiling 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 t...

Page 8: ...g adjusting screw DWhen 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...

Page 9: ...bin thread Note When bobbin thread is wound keep the presser foot lifted Adjustment Tension of wound thread Conically wound thread Length of wound thread m Slack winding is recommended for polyester t...

Page 10: ...thread or filament thread for example is used pass the thread through thread guide J as well 2 With the take up lever located at the upper most position pass each needle thread in the order shown in t...

Page 11: ...it into the hook Ft Adjusting of needle thread guide Please adjust needle thread guide of n edle thread tensioner according to sewing condition Thread guide position Left Middle Right Materials The th...

Page 12: ...sen Tighten Balance of thread tension AO Balanced tension BX po i r Tight needle or loose bobbin tension CX Loose needle or tight bobbin tension ITil Needle thread tension Needle thread tension should...

Page 13: ...and stop when the needle is lifted mm shown table from the lowest position 3 Rotate the hook by hand to position the hook point to the center of needle axis 4 Move the hook bracket leftward or right w...

Page 14: ...ntis mmwhen the needle Islifted by mmfrom Its lowest position shown Inbefore page 1 Remove the face plate loosen the set screw of needle bar bracket and vertically move the bar to adjust 2 After the a...

Page 15: ...tion For light fabrics For usual fabrics For heavy fabrics Approx 0 8mm from throat plate Approx 1 0mm from throat plate Approx 1 2mm from throat plate Adjustment procedure 1 Lean the machine head bac...

Page 16: ...e boss of hook shaft bearing 3 If the timing mark is not in line with the black line remove the timing belt and in stall it again to adjust Relationship between hook motion and opener motion 1 Turn th...

Page 17: ...ssure bar and the needle bar to be 13 5 and tentatively tighten the screws and b of the feed shaft crank 6 Check that the right feed shaft crank is con nected with the link at right angle as shown in...

Page 18: ...protrudes 0 0 5 mm from thefixed knife asshown inFigure and tighten thebolts and Bolt g Thread trimmer rocking crank Bolt D Thread trimmer rocking crank 2 Gap between movable knife and bobbin case ho...

Page 19: ...immer cam 3 Turning the balance wheel by hand adjust the thread trimmer cam so that the movable knife starts moving when the green mark point on the balance wheel comes in line with the black mark poi...

Page 20: ...balance wheel comes in line with the black mark point on the arm Toadjust loosen twotension release cam clamp screws 4 Opening degree oftension disc should be adjusted with the tension release roller...

Page 21: ...mechanism and trimming failure adjust it so that thread can be trimmed with minimum pressure 3 Move the movable knife and check that the thread can be sharply trimmed Fixed knife bracket Hexagon socke...

Page 22: ...hecam follower crank and adjust theconnecting rod p sothatthecam roller can smoothly enter thegroove ofthread trimmer cam Then tighten thenuts and p 11 Adjustment of the cam groove and the cam roller...

Page 23: ...se blockso that the line and the line 6 are the same plane then tighten the screw 3 Loosenthe screw then adjust the wiper moveso as the clearance is2 mm then tighten the screw Connecting rod Lower of...

Page 24: ...oot goes Presser foot goes UP after holf up needle DOWN to UP and thread trimming 1 Toe Down T Heeling Neutral stitching start position Neutral Notes 1 Stitching speed can be changed by changingdegree...

Page 25: ...wise and decreases when turned counterclockwise The adjustable range is 160 to 320 spm Factory set to 200 spm Internal variable resistors for speed setting 1 2 POSITION select switch L P T H H o SPEED...

Page 26: ...ignal needle DOWNposition output select switch S4 S3 High speed operation signal pedal light heeling signal output select switch Functions for reverse operation of sewing machine after thread trimming...

Page 27: ...Sewing machine rotates one turn and trims thread then presser foot goes up 2 POSITION Stop at needle DOWNposition Presser foot goes up Sewing machine rotates half turn from DOWN to UP position and tri...

Page 28: ...eed and counterclockwise turn decreases The speed is adjustable between 160 and 320spm factor set to 250spm Speed setting Internal variable resistors P T H M L Low speed P Positioning speed T Thread t...

Page 29: ...edle UP control by back tack switch PCS 1 2 POSITION switch IB Back tack solenoid at thread trimmer SSL Presser foot lifting cancel switch by light heeling RU Reverser needle lifting switch Used to st...

Page 30: ...d 9 1 VC1 Run low speed 8 12V 7 Correction stitching 6 CpR OXI 1 VC2 1 UP DOWN control 5 Variable speed signal 4 Thread trimmer 3 OV 1 L Run medium speed 2 OV 1 External knob 10k n Option 2 One shot 6...

Page 31: ...all gauge below 11 is used each needle thread should be wound about 3 4 turn around needle and then passed through needle eye as shown below to assure neat stitches It is re commended to use stepped n...

Page 32: ...movable knife Lubrication Automatic lubrication Automatic back Touch back Bed size 517 X 178 mm Needle gauge Standard 3 2 4 8 6 4 mm Option 2 4 4 5 6 8 9 5 12 7 15 9 19 25 4 28 5 31 8 38 1 mm Notes N...

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