Mitsubishi Electric LU2-4410-B1T-CS, Instruction Manual

Page 1: ...A180E271P03 INSTRUCTION MANUAL LOCKSTITCH COMPOUND FEED AUTOMATIC UNDERTRIMMER INDUSTRIAL SEWING MACHINES LU2 4410 B1T CS Single Needle LU2 4430 B1T Double Needle 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: ...ok motion and the needle motion 8 C Adjustment of the feed dog height 9 D Relationship between the rotating hook motion and the thread take up lever motion 10 E Relationship between the rotating hook motion and the opener motion 10 F Relationship between the needle motion and the feed dog motion 11 G Safety clutch 12 H Adjustment of upper feed length needle side 13 I Adjustment of forward backward...

Page 4: ...ole Ⓐ 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 5mm adjust as follows 1 Disconnect the plug 12pins 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 pl...

Page 5: ...l use MC70M specified by Mitsubishi 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 USAGE PRECAUTION Oil level mark 2 ...

Page 6: ...to prevent burning of the motor However in case of half constraint and over load the power may not be turned off After the failure is eliminated the normal operation is resumed by turning off the power once then turning on again The same operation occurs 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 ...

Page 7: ...ller 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 Winding amount adjustment screw Thread guide Double Needle Insert the needle upto the bottom of needle clamp and tighten the screw kee...

Page 8: ... 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 the figure below opens the saucer of the needle thread tension adjuster and the needle thread can easily pulled out LU2 4410 LU2 4410 LU2 4430 LU2 4430 Detail to to Detail L12 L14 R10 R12 See detailed figure Lead the th...

Page 9: ...ch In the case that the switch is turned to the arrow direction by 180 no backward stitching occurs even when the switch is pushed Use this function to avoid the malfunction such as unnecessary reverse stitching in the case that the fabric comes in contact with the switch during sewing 6 Setting of bobbins 1 Pull out 5cm thread tail from bobbins 2 Put bobbins into hooks in the direction as the fol...

Page 10: ...d be adjusted on the basis of bobbin threads tension Adjust needle threads tension by turning thread tension nuts Needle threads tension can be also adjusted by changing intensity and movable range of the thread take up spring in case of sewing the special fabric and thread A Adjustment of the presser foot pressure Adjust the presser foot pressure according to the fabric by turning the pressure ad...

Page 11: ...d the scarf of the needle is 0 05mm or lower 6 Tighten screws Ⓑ Ⓒ Note Be careful not to overtighten screws Ⓒ 7 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 3mm 8 Move the tip of the hook to the needle side by turning the pulle...

Page 12: ...e 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 ad...

Page 13: ...he 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 E 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 ap...

Page 14: ...6 Check that the feed rock shaft crank right is connected 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 feed rock shaft crank right 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 f...

Page 15: ... 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 smallest when the white mark ...

Page 16: ...pin counterclockwise Note Please adjust in the range where the mark point of the eccentric pin is facing to the reverse block side as shown in the figure J Adjustment of the outside presser foot and the inside presser foot 1 Adjustment of working height of the outside presser foot and the inside presser foot Please adjust working height of the presser foot when sewing the fabric having large elast...

Page 17: ...he right the up and down movement of the inside presser foot decreases and it of the outside presser foot increases 6 After adjusting fully tighten the screw Ⓐ The up and down movement of the inside presser foot and it of the outside presser foot are factory adjusted to 3mm and 4 2mm 3 How to install the eccentric cam 1 Turn the pulley and stop it at the position where the thread take up lever com...

Page 18: ... protrudes 0 to 0 5mm from the fixed knife as shown in the figure and tighten bolts Ⓐ and Ⓑ 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 inner...

Page 19: ...ulley 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 loosen two thread trimmer cam clamp screws Ⓐ HO...

Page 20: ...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 21: ...n the 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 P 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 HOW TO...

Page 22: ...lt Ⓙ 8 Turn the pulley and stop it at the position where the needle comes to the lowest 9 Loosen nuts Ⓖ and Ⓗ 10 Push the cam follower crank Ⓚ and adjust the pitman rod Ⓛ so that the cam roller can smoothly enter the thread trimmer cam groove 11 Adjustment of the cam groove and the cam roller a Put the cam roller into the thread trimmer cam groove by pushing the cam follower crank Ⓚ b Turn the pit...

Page 23: ...cedure of the hook 1 Loosen three set screws of the small gear to the hook shaft 2 Remove the opener 3 Remove the fixed knife 4 Move the lever to the arrow direction and move the movable knife to the arrow direction 5 Remove the hook Note To install the hook reverse the removing procedure When tightening screws of the small gear check that one of the screws enters a notch of the hook shaft HOW TO ...

Page 24: ...er feed mm 2 0 to 6 0 Thread trimmer Touch back Hook horizontal rotating hook Large Bobbin Made of aluminum for thread trimmer Lubrication system Automatic lubrication Bed dimensions mm 517 178 Needle gauge mm Standard 6 4 Special 3 2 4 4 8 8 9 5 12 7 16 19 25 4 Note Feed dog throat plate rotating hook bobbin case bobbin and bed slide should be those designed for the thread trimmer The bobbin shou...

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ...Printed in Japan ...