Mitsubishi Electric LU2-4652-B1T Instruction Manual Download

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A180E557P02

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH COMPOUND-FEED
AUTOMATIC UNDERTRIMMER
INDUSTRIAL SEWING MACHINES

LU2-4652-B1T

MODEL

Summary of Contents for LU2-4652-B1T

Page 1: ...A180E557P02 INSTRUCTION MANUAL SINGLE NEEDLE LOCKSTITCH COMPOUND FEED AUTOMATIC UNDERTRIMMER INDUSTRIAL SEWING MACHINES LU2 4652 B1T MODEL ...

Page 2: ...ion 1 If the machine s oil pan has 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 thr...

Page 3: ...f threads tension 11 A Adjustment of the needle thread tension 11 B Adjustment of the presser foot pressure 11 C Adjustment of the outside presser foot and inside presser foot 12 D Instant alternating switch 13 E The stopper screw for adjusting the maximum alternating stroke 13 F Installing the feed regulator bracket 14 G Adjustment of the alternating stroke sensing potentiometer 14 H Timing betwe...

Page 4: ... 3 Arrange piping by urethane tubes between the upper elbow union installed by step 2 and the port B B of the upper presser foot lifter solenoid valve and between the lower elbow union and the port A A 4 Connect the connecter of the presser bar lifter solenoid valve to the presser foot lifter connector on the control box 5 Connect the urethane tube from the top of the sewing machine to the port A ...

Page 5: ...f the solenoid valve assembly 9 Connect the air supply source to the IN port of the filter regulator 10 Tie together urethane tubes and cords with attached binding bands Note Set the standard air pressure of the regulator to 0 4 MPa 4 kgf cm2 B port B port A port A port A port IN port to the air supply source Knee switch LF FM CFT Option Urethane tube OPTION B OPTION A F L S M Air cylinder assembl...

Page 6: ...oosen the nut on the knuckle 2 Rotate the air cylinder shaft Adjust the position of the knuckle to the air cylinder shaft 3 The stitch immediately before trimming is as follows During forward stitching Looking from above turn the shaft clockwise to change to reverse stitching Too short during reverse stitching Looking from above turn the shaft clockwise Too long during reverse stitching Looking fr...

Page 7: ...peed of the air cylinder at the instant alternating return adjust the handle with the black colored locknut on the dual speed controller of the instant alternating solenoid valve lower side 5 Height adjustment of the automatic presser foot lifter The presser foot lifter height at the automatic presser can be adjusted 1 Remove the top cover 2 Slide the stopper plate on the presser foot lifter air c...

Page 8: ...hole Ⓐ then turn the tool 2 Adjustment of Down position When the pedal is Neutral the machine stops at Down position If marks deviate large than 5 mm adjust as follows 1 Disconnect the plug 12 pins of cable from the machine head 2 Run the machine and stop at Down position 3 While holding the pulley insert the Adjusting tool in the hole Ⓑ then turn the tool 3 Confirm the stop operation then set the...

Page 9: ...l use MC70M specified by Mitsubishi Refer MC70M Specific gravity 15 0 86 g cm3 Viscosity 40 10 9 mm2 s USAGE PRECAUTION Oil level mark 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 6 ...

Page 10: ...s for the detector malfunction or the line breakage 6 Installation of the belt cover 1 Install the belt cover on the machine side for safety Refer to the provided instruction document contained in the same package 2 Install the belt cover on the motor side for safety 7 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...

Page 11: ...und 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 winding amount of 80 of full capacity W...

Page 12: ...ding of the needle thread 1 Pass each needle thread through thread guide A Note When thin slippery thread polyester thread or filament thread 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 Note Pushing the needle thread tension releasing button shown in ...

Page 13: ...ing can be reversed by depressing the reverse sewing lever or pushing the touch back switch 6 Setting of the bobbin 1 Pull out 5 cm thread tail from the bobbin 2 Put the bobbin into the hook in the direction as the following figure 7 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 Nee...

Page 14: ...of the bobbin thread tension Balance of threads tension A Adjustment of the needle thread tension To adjust needle thread tension turn the thread tension nut Pre tension nut Tighten Loosen Tighten Loosen Thread tension nut B Adjustment of the presser foot pressure Adjust the presser foot pressure according to the fabric by turning the pressure adjusting screw Weaken Strengthen HOW TO USE Thread Op...

Page 15: ... rock shaft crank right The built in spring pulls down the outside presser foot until it makes contact with the throat plate Then tighten the set screw Ⓐ This completes the adjustment i e the protrusion of the outside presser foot has been decreased by a set distance And the vertical motion of the inside presser foot has been increased by that same distance 2 As a contrary case 1 to decrease the r...

Page 16: ... highest only while pressing the instant alternating switch E The stopper screw for adjusting the maximum alternating stroke The maximum alternating stroke can be adjusted with the stopper screw shown in the right figure The maximum alternating stroke is fixed at 6 mm when the sewing machine is shipped from the factory If the maximum alternating stroke is required to make smaller take the followin...

Page 17: ...r switch 2 Remove all connectors except OPTION B connector 3 Remove the top cover in the condition which set the alternating stroke adjusting dial for scale 2 4 Turn on the power switch and then set the operation panel of the control box to the input display V2 at the programming mode E 5 Loosen the slotted bolt Ⓓ of the potentiometer crank At this time be careful not to give any bending torque to...

Page 18: ...mm or lower 5 Tighten screws Ⓐ Ⓑ Note Be careful not to overtighten screw Ⓑ 6 Slide the large gear right and left so that the tip of the hook position is in the center of the needle and tighten screws Ⓒ Note Check the large gear and the hook saddle isn t in contact and its distance is less than 3 mm 7 Move the tip of the hook to the needle side by turning the pulley 8 Return the machine head to th...

Page 19: ...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 height 5 After adju...

Page 20: ...e 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 K 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 located most remotely from the throat plate 2 Check that the gap between the lug Ⓐ and the opener is app...

Page 21: ...ssure bar and the vibrating prevention bar to 9 2 mm and fully tighten the feed rock shaft crank set screws Ⓐ Ⓑ At this time check that the needle enters the hole at center of the feed dog Note Be careful not to touch the feed rock shaft crank right and the bed together HOW TO USE Link Needle bar Vibrating prevention bar Pressure bar Feed rock shaft crank right 9 2 mm Screw Ⓑ Needle bar rock shaft...

Page 22: ...ushing down the pushbutton on the opposite side of bed with your left hand turn the pulley slowly with your right hand away from you as shown in the figure 2 The pulley will be stopped by the gear plate but turn the pulley more firmly 3 Release the pushbutton 4 The clutch device will be set as shown in the figure 3 Force applied to the safety clutch 1 The force applied to the safety clutch is the ...

Page 23: ... the link and the feed rock shaft crank right may not work O 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 P...

Page 24: ...able knife is hidden 0 to 0 5 mm in the fixed knife as shown in the figure and tighten bolt Ⓐ 2 Gap between the movable knife and the lug of inner hook 1 Turn the pulley and stop it at the position where the needle comes to the lowest 2 While pushing the cam follower crank turn the pulley and stop it at the position where the movable knife move to the position as shown in the figure 3 Turn the inn...

Page 25: ...stment of the thread trimmer cam 1 Turn the pulley and stop it at the position where the needle comes to the lowest 2 Put the cam roller into the thread trimmer cam groove by pushing the cam follower crank 3 Turning the pulley adjust the thread trimmer cam so that the movable knife starts moving when the green mark point on the pulley comes in line with the black mark point on the arm To adjust lo...

Page 26: ...ng cam clamp screws Ⓐ 4 The opening amount of the thread tension disc should be adjusted with the thread tension releasing roller Ⓑ mounted on the convex portion of the thread tension releasing cam as shown in the figure To adjust loosen screws Ⓒ and pull the wire 5 Make fine adjustments by loosening the nut Ⓓ 6 Loosen the nut Ⓓ and make the outer casing approach to the right to increase the openi...

Page 27: ...thread trimmer mechanism and trimming failure adjust so that the thread can be trimmed with the minimum pressure 3 Move the movable knife and check that the thread can be sharply trimmed U Sharpening of the fixed knife If the fixed knife is dull it should be sharpened as shown in the figure Since it is very difficult to sharpen the movable knife replace it with a new one when it dulls Fixed knife ...

Page 28: ...inum for thread trimmer Lubrication system Automatic lubrication Standard air pressure 0 4 MPa 4 kgf cm2 Bed dimensions mm 517 178 The maximum sewing speed is fixed automatically according to the alternating up and down stroke However it is not fixed automatically to the stitch length So manually adjust the maximum sewing speed whenever it is required to the stitch length Note Feed dog throat plat...

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Page 32: ...Printed in Japan ...

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