Brother LK3-B448E Instruction Manual Download Page 75

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LK3-B448E MARKII/BA-16

18. Troubleshooting

Check

Remedy

Problem

Cause

Page

Presser is contacting

thread wiper.

Thread wiper standby

position

Distance between
button clamp and top
of needle plate

Button clamp lifter

amount is too great.

Adjust the position of

the thread wiper.

Adjust the height of the
button clamp to within
13 mm.

Button clamp does not

rise.

Button clamp does not

drop.

Link return spring is

unhooked.

Presser lifter link is not

moving back.

Hook the link return

spring properly.

Button clamp lift

amount is incorrect.

Distance between
button clamp and top
of needle plate

Incorrect position of
button clamp holder
hook assembly

Adjust the button

clamp lift amount.

Thread wiper position

is incorrect.

Thread wiper position

Clearance between
thread wiper and
needle tip

The thread wiper is

obstructing the needle.

Adjust the operating
distance of the thread
wiper.

Adjust the height of the

thread wiper.

Thread wiper does not

operate correctly.

Lower thread winds to

one side.

Bobbin winder thread

tension stud height

Bobbin winder thread
tension stud height is
incorrect.

Adjust the height of the

thread tension stud.

Lower thread winding

amount is incorrect.

Thread winding

amount

Bobbin presser

position is incorrect.

Adjust the position of

the bobbin presser.

Uneven upper thread

length.

Upper thread length

Refer to "Skipped

stitches occur".

Stitches being skipped

at the sewing start.

Adjust the sub-tension.

Refer to "Skipped

stitches occur".

Threads comes

unthreaded.

Summary of Contents for LK3-B448E

Page 1: ...Please read this manual before using the machine Please keep this manual within easy reach for quick reference ELECTRONIC LOCKSTITCH BUTTON SEWER WITH BUTTON FEEDER LK3 B448E BA 16 INSTRUCTION MANUAL ...

Page 2: ...s given in the instruction manual With industrial sewing machines it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take up lever and consequently there is always a danger of injury that can be caused by these parts Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the ...

Page 3: ...7 kg The installation should be carried out by two or more people Do not connect the power cord until installation is complete otherwise the machine may operate if the foot switch is pressed by mistake which could result in injury Hold the machine head with both hands when tilting it back or returning it to its original position Furthmore after tilring back the machine head do not push the face pl...

Page 4: ...t touch any of the moving parts or press any objects against the machine while sewing as this may result in personal injury or damage to the machine If an error occurs in machine or if abnormal noises or smells are noticed immediately turn off the power switch Then contact your nearest Brother dealer or a qualified technician If the machine develops a problem contact your nearest Brother dealer or...

Page 5: ...changing bobbin and needle cleaning etc CAUTION Be sure to connect the ground If the ground connection is not secure you run the risk of receiving a serious electric shock Direction of operation 3 4 4 3 1 2 1 q r e w t Hazardous voltage will cause injury Turn off main switch and wait 5 minutes before opening this cover Un voltage non adapt provoque des blessures Eteindrel interrupteur et attendre ...

Page 6: ...9 3 21 Installing the motor cover 20 3 22 Installing the spool stand 20 3 23 Installing the eye guard 20 3 24 Adjustment by the accessory spring 21 4 Lubrication 22 4 1 Lubrication points 22 4 2 Applying grease 23 4 3 Draining the oil 23 5 Operation 24 5 1 Name and function of each operation panel item 24 5 2 Operating procedure 26 5 2 1 Setting the program number 26 5 2 2 Setting the X scale and ...

Page 7: ...l 45 10 15 Adjustment for excess buttons in the button shooter 46 10 16 Button replacement 47 10 16 1 Adjustment when the button diamenter is changed 47 10 16 2 Adjustment when the button thickness changed 48 10 16 3 If button hole arrangements differ 48 10 16 4 Adjusting the button carrier plate 48 10 16 5 Adjusting the feeder position adjustment 49 10 16 6 Adjusting the needle location 50 10 17 ...

Page 8: ...ch wControl box eOperation panel rFoot switch tMotor yTension release lever uPulley iSpool stand oThread take up lever 0Button feeder 1Vibrating bowl 2Control box 3Eye guard 4Thread take up cove 5Belt cover 6Motor cover 7Thread take up solenoid 4 0 e 5 u i 1 7 y 3 o t 6 w r 2 q ...

Page 9: ...ng 10 000 stitches which can be added Solenoid type Shuttle hook Standard equipment Solenoid type thread wiper Option Standard equipment P ROM Any sewing pattern can be added using BAS PC 300 16 49 sewing patterns are set already Up to 100 patterns can be added Total number of stitches of stored data which can be added is within 10 000 Three phase 400W induction motor Machine head 47kg Operation p...

Page 10: ...15 29 No of button holes 2 3 4 4 Sewing pattern No of threads 6 8 10 12 16 20 6 10 12 5 5 5 7 7 7 5 5 5 7 7 7 6 6 8 8 8 8 10 10 12 12 6 6 8 8 10 10 12 12 No of crossover stitches __ __ __ __ __ __ __ __ __ __ __ __ __ 1 1 3 1 1 0 0 0 0 No of stitches 13 15 17 19 23 27 13 17 19 22 28 22 28 20 24 26 28 32 26 30 34 38 Standard sewing length X 3 4mm 0mm 2 6mm 3 4mm Standard sewing width Y 0mm 3 4mm 2 ...

Page 11: ... Standard sewing width Y 3 4mm 3 4mm 3 4mm Program No 3 3 2 2 2 2 3 2 2 1 Check that the button hole diameter is 2 mm or greater before using the programs 2 Do not use the button lifter spring 3 the presser foot lifts up once and the wiper operates and then the other side is sewn because there is no crossover thread to be sewn Operation will be different if the optional solenoid type thread wiper ...

Page 12: ...7 38 39 40 41 42 43 44 No of button holes 4 Sewing pattern No of threads 6 6 8 8 10 10 12 12 6 6 8 8 10 10 6 6 10 10 No of crossover stitches 0 0 0 0 0 0 0 0 0 No of stitches 26 30 34 38 26 30 34 26 34 Standard sewing length X 3 4mm 2 4mm Standard sewing width Y 3 4mm 3 4mm Program No ...

Page 13: ...sser switch left side and start switch right side Solenoid type thread wiper When sewing without crossover threads program Nos 14 15 20 and 22 28 29 and 32 33 35 do not move the button clamp assembly vertically while sewing is in pro gress Refer to Changing special functions using the memory switches on page 59 memo 14 Button spacer set 2 3 Optional parts S09661 001 For women s garments For men s ...

Page 14: ... the power cord until installation is complete otherwise the machine may operate if the foot switch is depressed by mis take which could result in injury Hold the machine head with both hands when tilting it back or returning it to its original posi tion Furthermore after tilting back the machine head do not push the face plate side or the pul ley side from above as this could cause the machine he...

Page 15: ...e to the right of oval hole on motor NOTE Tighten the nuts so that the clearance between the table and the cushion collars is approximately 1 mm Place the motor pulley q onto the shaft of the motor w so that the key groove is aligned and then tighten the set screw e so that the center of the V groove in the motor pulley q is aligned as closely as possible with the center of the belt hole in the po...

Page 16: ...eave a gap of approximately 3 mm between the work table and the top of the box Use two nuts o at each installation location and make sure that both nuts are tightened 3 Close the covers panel mounting assembly w and main P C board mounting plate e and tighten them with the screws q The main P C board mounting plate e will be opened again during 3 13 Connecting the cords so provisionally tighten it...

Page 17: ...e number of the washers q 2 After the height is decided secure them with the nails e 1 Insert the tabs of the oil pan w into the holes for the cushions q and then secure it in place with the five nails e so that the oil pan w is not at an angle 2 While pushing the oil pan w down from above screw in the oil container r 3 5 Installing the oil pan 3 6 Installing the cushions e w q ...

Page 18: ...machine head gently on the table NOTE Pull the cords e out as shown in the illustration above in order to prevent them from being clamped by the machine head 3 Secure the two hinge assemblies q with the washers r the spring washers t and the bolts y and install the machine head r t y e 3 8 Installing the head rest Tap the head rest q into the table hole NOTE Tap the head rest securely into the tab...

Page 19: ...the vibration bowl q through the hole in the table 1 Mount the control box q to the bottom of the box stay e with screws w 2 Mount the control box stay e to the bottom of the work table with wood screws r 3 11 Installing the control box for vibrating bowl 3 10 Installing the vibrating bowl 1 Remove the rubber plug and then push the liquid cooling tank q 2 Tighten it with the set screw w ...

Page 20: ...nd right as necessary to install it by using hole bolts w spring washers e and washers r And install ground wires ty To vibrating bowl To control box For vibrating bowl 1 Raise the shooter lock pin w on the vibrating bowl q and secure the shooter e by inserting the pin w through the notch in the shooter 2 Secure the shooter e with thumb screw r on button feeder t ...

Page 21: ...he ground cord 0 for the upper shaft motor as shown in the illustration 8 Securely connect connectors P1 to P8 and P11 as indicated in the table 9 Secure the cords q with the cord clamps 2 and 3 10 Close the cord presser plate y in the direction of the black arrow and secure it by tightening the screws t NOTE Check that the cords do not get pulled when the machine head is tilted back gently 11 Tig...

Page 22: ... vibrating bowl to the motor Button feed sensor 6P 9P 7P 20P 20P connector control box White White Red Black White 6P connector Botton stopper solenoid 9P connector machine head Button feeder switch Black White Red Green Yellow Brown Blue 7P connector control box for vibrating bowl Black White Red Green Yellow Brown Blue Black 9P connector 2P connector 3P connector male 9P connector female Green Y...

Page 23: ...button feeder w with screws e spring washers r and washers t Be sure to pass the wires through the hole in the cover when attaching the button feeder cover q A B Power switch connector control box Control box for vibrating bowl Green Yerrow Black White Red Control box side A Green Yerrow Black White Red Control box side B Green Yerrow Red White ...

Page 24: ...peration may also occur 1 Install the operation panel presser plate q to the top of the button feeder cover with the two screws w 2 Insert the panel e into the operation panel presser plate q and then secure it with the two screws r 3 Insert the connector cord t into the control box through the hole at the side of the box Refer to 3 13 Connecting the cords for details on connecting the cord Red Wh...

Page 25: ... there is 9 10 mm of deflection in the V belt q when it is gently pushed in the middle with a force of approximately 10 N After adjusting tighten the bolt A to secure the left pulley assembly 5 Move the right tesion pulley so that there is a gap of about 1 mm between it and the V belt q and then tighten the bolt B to secure the right pulley assembly NOTE Use brother specified V belt belt VM The V ...

Page 26: ...E If using the foot switch without installing it to the work table leg move the foot switch at least 10 mm away from the leg If the foot switch is not fully in contact with the work table leg when the foot switch is used for example if it is just hooked loosely onto the work table leg it may cause the sewing machine to operate incorrectly If using the optional two pedal foot switch change the sett...

Page 27: ...washers r 2 Pass the motor shaft through the notch in the motor back cover w and then tighten the screws y and the washers u so that the clearance between the motor pulley t and the motor cover q is uniform 3 22 Installing the spool stand Assemble the spool stand q while referring to the spool stand instruction manual and then install the spool stand q at the right side of the work table 3 23 Inst...

Page 28: ...d up more after it is sewn install the accessory spring 1 Install the spring support q with the bolt w 2 Install the spring e with the washer r and the screw t The spring is effective for use with the following sew ing patterns 1 6 14 17 20 28 30 32 33 46 49 When using a solenoid type thread wiper the effec tive patterns are 36 42 ...

Page 29: ...out one third full in the oil sight glass If oil is not added and the oil drops below this level there is the danger that the machine may seize during operation Be sure to let the machine operate for a while after adding the oil Use only specified Brother oil Nisseki Sewing Lube 10 for the machine oil 4 1 Lubrication points 1 Fill the arm side oil tank with oil When setting up the sewing machine a...

Page 30: ... by the arrow If too much grease is applied here the button clamp may not move up and down smoothly and error E 6 may appear on the display 4 3 Draining the oil 1 Remove and empty the waste oil container q whenever it is full 2 After emptying the waste oil container q screw it back into its original position q ...

Page 31: ...k a pattern r TEST indicator Illuminates when the TEST switch has been pressed t BOBBIN WIND switch Press this switch to wind the lower thread y SELECT switch PROGRAM NO indicator u X SCALE indicator i Y SCALE indicator o SPEED indicator 0 COUNTER indicator 1 u PROGRAM NO indicator Illuminates when the SELECT switch y is pressed to shown the program number setting Use this switch to select a menu ...

Page 32: ... to shown the Y scale setting 0 SPEED indicator Illuminates when the SELECT switch y is pressed to shown the speed setting 1 COUNTER indicator Illuminates when the SELECT switch y is pressed to show the bobbin thread or production counter setting 2 DISPLAY SET switches Used to change the menu details which are displayed in the window 4 3 User program switches Used to set and select user programs 4...

Page 33: ...le setting is flashing in the display window The setting is displayed as a percentage Depress the foot switch to the second step The display will stop flashing and illuminates steadily and the feed mechanism will move to the sew ing start position 1 2 3 Press the SELECT switch y until the SPEED indicator il luminates Press the DISPLAY SET switches 2 until the de sired speed setting is flashing in ...

Page 34: ...rouble indicator w 1 When buttons are being fed to the button clamp the trouble indicator w will be OFF 2 When the trouble indicator w is flashing buttons are not supplied to the button clamp 3 If the trouble indicator w is on a problem has occurred See below 3 Manual switch e Press to feed a button w q e 5 4 Operating the vibrating bowl 1 Turn the power switch on 2 Turn the switch q in the contro...

Page 35: ...EST switch The TEST indicator will illuminate 8 Press the TEST switch The TEST indicator will switch off and the test mode will be cleared 9 Depress the foot switch The work clamp will rise and the preparation for sewing will be completed TEST T E S T 1st step 2nd step 6 Checking the sewing pattern When checking by operating only the feed mechanism To ensure safety during use You can prevent accid...

Page 36: ...the foot switch is depressed by mistake and serious injury could result Refer to the table at right for details on which needle and thread to select NOTE Use buttons which have a hole diameter that is greater than the value given in the table to ensure that the needle does not touch the button 7 2 Installing the needle CAUTION CAUTION Loosen the set screw q insert the needle w as far as it will go...

Page 37: ... foot switch e until the lower thread stops being wound onto the bobbin Release the BOBBIN WIND switch w after the machine starts operating If you release the foot switch before winding is com pleted depress it once more while pressing and holding the BOB BIN WIND switch w 7 Remove the bobbin hook the thread onto the knife r and then pull the bobbin in the direction of the arrow to cut the thread ...

Page 38: ...proximately 30 mm of thread 7 6 Thread tension reference guide w e r Weaker Stronger Weaker Stronger w q 7 6 1 Lower thread tension Adjust the thread tension to the weakest possible tension by turning the thread tension nut q until the bobbin case will not drop by its own weight while the thread end com ing out of the bobbin case is held 7 6 2 Upper thread tension Turn the tension nut q main tensi...

Page 39: ...en the screw w and then move arm thread guide R q When sewing thick material move arm thread guide R q to the left The thread take up amount will become greater When sewing thin material move arm thread guide R q to the right The thread take up amount will become less 7 6 6 Thread take up amount Loosen the screw q and move the stopper 3 57 nut w to adjust the operating angle of the thread take up ...

Page 40: ...e power switch at the following times otherwise the machine may operate if the foot switch is depressed by mistake which could result in injury Threading When replacing the bobbin and needle When not using the machine and when leaving the machine unattended Do not touch any of the moving parts or press any objects against the machine while sewing as this may result in personal injury or damage to ...

Page 41: ...he top of the rotary hook thread guide and the shuttle race Be sure to wear protective goggles and gloves when handling the lubricating oil and grease so that they do not get into your eyes or onto your skin otherwise inflammation can result Furthermore do not drink the oil or eat the grease under any circumstances as they can cause vomiting and diarrhoea Keep the oil out of the reach of children ...

Page 42: ...g the eye guard Wipe the eye guard clean with a soft cloth NOTE Do not use solvents such as kerosene or thinner to clean the eye guard 9 4 Checking the needle Always check that the tip of the needle is not broken and also the needle is not bent before starting sewing ...

Page 43: ...e head do not push the face plate side or the pulley side from above as this could cause the machine head to topple over which may result in personal injury or damage to the machine If the power switch needs to be left on when carrying out some adjustment be extremely careful to observe all safety precautions If any safety devices have been removed be absolutely sure to re install them to their or...

Page 44: ...t so that the tip of the rotary hook is aligned with the needle center line When returning the felt support e place it as shown in the illustration so as not to clamp the felt t and then gently press the felt t and the wick y until they are at the same height as the rotary hook race Return the support w to its original position w e e 10 1 Adjusting the needle bar height Turn the machine pulley to ...

Page 45: ...ok will obstruct the needle resulting in an excessively high amount of friction 10 4 Adjusting the needle clearance Turn the machine pulley to align the tip of the rotary hook with the needle center line Then loosen the set screw q and turn the eccentric shaft w to adjust so that the clearance between the needle and the rotary hook is 0 01 0 08 mm 10 5 Adjusting the shuttle race thread guide Insta...

Page 46: ...ake up solenoid r To reduce the thread take up amount move the stopper e upward To increase the thread take up amount move the stopper e downward NOTE Do not increase the stroke of the thread take up lever any more than is necessary If the sub thread tension is too high the needle thread length may become too short and the thread may come out of the needle Furthermore if the sub thread tension is ...

Page 47: ... at a distance of 0 5 mm from the needle hole plate 1 6 Place the thread trimming connecting rod y onto the connecting rod lever pin u and then install to the needle plate t 10 7 1 Replacing the movable knife and fixed knife 1 Open the large shuttle hook cover remove the screw q and then remove the feed plate w 2 Remove the two screws e and the two screws r and then remove the needle plate t 3 Rem...

Page 48: ...ge Movable knife Fix knife Fig 1 Cutting edge Cutting edge Cutting edge 10mm e w q 10 8 Adjusting the button clamp lift amount The button clamp lift amount is 10 mm from the top of the needle plate To adjust the button clamp lift amout remove the button clamp presser spring q loosen the screw w and adjust the button clamp holder hook e by moving it up and down If movement is sluggish when the butt...

Page 49: ...gh so that the material will not slip when pulled lightly If the clamp pressure is too high the buttons may not be fed properly q w 10 10 Adjusting the position of the button holder 1 Loosen the two hexagonal bolts q and adjust the button holder body w by moving it 2 Check that the needle will go through the button hole with no contact Refer to 6 CHECKING THE SEW ING PATTERN q w ...

Page 50: ... is released 3 Stop machine inching when button transport arm q moves and the button is at button guide surface A 4 Make sure that top of button carrier w is flush with the button guide surface of button clamp e If they are not properly aligned loosen screw r and move button clamp holder t up or down 5 Loosen screw y set presser bar lifter hook A u against presser bar lifter roller arm i and tight...

Page 51: ...detecting the machine stop posi tion and should not be loosened If the index mark w is not inside the mark r when the sewing machine is started error code E 50 will be dis played Turn the machine pulley to move the index mark w to the correct position and then start the sewing machine 10 13 Adjusting the thread wiper 1 Loosen the set screw w and move the wiper arm support e up or down to adjust so...

Page 52: ...n addition the arms should topple any standing buttons to assure a smoother flow 3 Loosen screw y and adjust the gap between the bottom of arm A t and the vibrating bowl so that one button can pass 4 Loosen bolt i and move selector plate u in or out so that the buttons are aligned face up 5 Loosen screw 0 and adjust the gap between the bottom of height control arm o and the top of the buttons to a...

Page 53: ...Turn the button carrier q by hand in the direction of the arrow and remove any buttons from the button carrier pin w 2 With the button carrier q in this position pull lever e to remove any excess buttons from the shooter at point A 3 Press the manual switch to feed a button to the button clamp Point A ...

Page 54: ... mm in diameter loosen screw t and replace cover r nonstandard accessories 3 When the button diameter is changed adjust button stopper A y with the adjusting screws u Adjust until stopper A y slides into the groove of the upper cover r and comes into contact with the second button position A Button clamp adjustment 1 Loosen step screw q and insert a button into the button clamp w 2 Lightly tighten...

Page 55: ...r Next page Adjust the feeder position Next page Adjust the needle position See p 31 10 16 4 Adjusting the button carrier plate 1 Remove the button clamp q 2 Turn the slide base screw 0 to widen the slide base width then put the gauge t on the button carrier plate Turn the slide base screw 0 and tighten the gauge at the bottom of the slide base At this time leave the screw o and the screw i of the...

Page 56: ...oved up and down 7 If the button carrier pin and hole are not aligned in the left right direction loosen the bolt t and move the entire button feeder assembly to the right or left to adjust If they are not aligned in the forward back direction loosen the nut y and move the connecting shaft u up or down to move the button transport arm e forward or back After adjustment press manual switch w and re...

Page 57: ...g the X scale and Y scale on page 45 2 Check the positions of the button holes Refer to Checking the sewing pattern on page 26 Vertical feed position 1 Set the Y scale so that the holes A and C in the button are aligned with the point of the needle Refer to Setting the X scale and Y scale on page 45 2 Check the positions of the button holes Refer to Checking the sewing pattern on page 26 Needle Bu...

Page 58: ...ection in the V belt q when it is gently pushed in the middle with a force of approximately 10 N After adjusting tighten the bolt A to secure the left pulley assembly 7 Move the right tension pulley so that there is a gap of about 1 mm between it and the V belt q and then tighten the bolt B to secure the rigth pulley assem bly 8 After adjustment install the belt cover and the motor cover 10 17 Rep...

Page 59: ... slightly when it is first used so adjust the belt tension after about 3 000 cycles of use When above belt tension is weak this will be cause of following problems Noise and vibration become large Needle up stop position becomes unstable Error message E 5 is displayed Check that the motor is positioned so that the V belt is straight Fig 1 ...

Page 60: ...r is illuminated Synchronizer 1 When COUNTER indicator is illuminated Presser sensor ON when presser is lowered 1 The synchronizer display simultaneously displays the needle up signal 3rd digit the 24 section signal 2nd digit and the needle down signal 1st digit H L L H when the sensor is on and L when the sensor is off Needle down signal 24 section signal Needle up signal If the DIP switches at t...

Page 61: ...e is 100V for 100 V spece 380V for 380 V spece 400V for 400 V spece or 415V for 415 V spece Specifications w q 10 19 Checking the input voltage 1 Turn on the power switch 2 Press the SELECT switch q until the Y SCALE indicator w illuminates 3 While pressing the TEST switch e press the RESET switch r 4 If the input voltage is normal the input voltage conditions will be shown in the display window t...

Page 62: ...mechanism one pulse at a time If the DISPLAY SET switch is pressed while the X SCALE indicator is illuminated the feed mechanism will move to the left If the DISPLAY SET switch is pressed while the X SCALE indicator is illuminated the feed mechanism will move to the right If the DISPLAY SET switch is pressed while the Y SCALE indicator is illuminated the feed mechanism will move down If the DISPLA...

Page 63: ... illuminate and the production counter will be displayed in the display window y Press the RESET switch r to reset the production counter to 0000 You can also press the DISPLAY SET switches u to set the production counter to the desired value 3 When the foot switch is depressed the sewing ma chine will start sewing 4 If you press the TEST switch e or the SELECT switch q the display will return to ...

Page 64: ...e 6 Press the DISPLAY SET swithes 0 to select the X scale setting that you would like to record 5 Press the SELECT switch e The X SCALE indicator t will illuminate 4 Press the DISPLAY SET switches 0 to select the number for the program that you would like to record 3 Press the SELECT switch e The PROGRAM NO indicator r will illuminate 2 Turn on the power switch While pressing the TEST switch w pre...

Page 65: ...r will sound and the user program with the number selected will be cleared If you press and hold the RESET switch 2 until after the buzzer has sounded twice all user programs will be cleared NOTE If data has been recorded in user programs P1 P2 P3 and P4 and you then clear the data in user program P2 the contents of P3 will be transferred to P2 and the contents of P4 will be transferred to P3 1 Pr...

Page 66: ...00 to indi cate that cycle sewing program No 1 is being re corded Programs P2 P3 and P4 switches can also be used for program ming 5 Press the SELECT switch e The PROGRAM No indicator r will illuminate and 1 will appear in the display window 0 6 Press the DISPLAY SET switches 1 to select the number for the user program that you would like to record 7 Press the SELECT switch e 2 will appear in the ...

Page 67: ...ser program Using a cycle sewing program Clearing a cycle sewing program 1 Switch the machine to recording mode by the procedure in step 3 of recording a user program 2 Use one of the P switches user program switches to specify which cycle sewing program to clear Press the P1 switch o if you would like to clear cycle sewing program No 1 Pc 1 will be displayed 3 Press the RESET switch 2 The recorde...

Page 68: ...pecifications Single pedal Single pedal Two pedals Two pedals Raising the presser at the sewing end Presser is raised automatically Presser is raised by pressing the pedal Presser is raised automatically then it is lowered by pressing the pedal Presser is kept lifted while the pedal is pressed DIPA 1 14 Changing functions using the DIP switches 14 1 Operation panel DIP switches The operation panel...

Page 69: ... a low speed of 700 rpm First two stitches are sewn at a low speed of 400 rpm Low speed sewing is not performed at the start of sewing The motor operates in reverse when the upper shaft stops to return the needle bar to close to its highest position Area checking of the sewing data is not carried out Switch DANGER 14 3 DIP switches inside the control box The DIP switches q inside the control box a...

Page 70: ...shed the work clamp automatically opens and closes once practiceoperation Switch SELECT PROGRAM NO RESET COUNTER X SCALE Y SCALE SPEED P TEST BOBBIN WIND P4 P3 P1 P2 POWER r t w y e 15 Changing special functions using the memory switches The functions of the switches on the operation panel q can be changed to carry out special functions NOTE After changing the memory switch settings press the powe...

Page 71: ...e stitches memo 23 When DIP switch A 8 is simultaneously ON setting values changed using the operation panel are ignored memo 24 memo 2F memo 30 memo 31 memo 32 memo 33 memo 34 memo 35 memo 36 memo 37 memo 38 memo 39 memo 3A memo 3b memo 3c memo 3d memo 3E memo 3F memo 40 memo 4F Possible setting range 0 30 0 30 12 27 1 15 0 5 3 9 0 99 1 20 1 20 1 20 1 20 1 20 Units mm mm x 100rpm x 7 5 Needle x 1...

Page 72: ...er supply voltage Remedy Turn off the power and check if connectors P3 is disconnected Turn off the power and then turn the machine pulley to check if the machine has locked up Check the synchronizer connection Check if connectors P11 P12 and P13 are disconnected Turn off the power and check the ground wire connection Press the RESET switch and then set the enlargement ratio again Press the RESET ...

Page 73: ...it board is abnormally hot Malfunction of EEPROM malfunction of main circuit board Solenoid short circuit malfunction of main circuit board or power relay is not operating malfunction of power supply circuit board Bad connection in cable between power supply circuit board and main circuit board Abnormal current detected in power supply circuit board Corrupted EEPROM data or main PROM version has b...

Page 74: ...n Machine Head Adjust button adjustment dial Adjust button clamp width When button thickness t changes Replace the spacer S Page Adjust height control plate When button hole gap B changes Adjust needle location Replace the button carrier Adjust right left needle and button carrier pin positions Adjust slide base width Adjust the stopper Replace the button top cover Replace the shoot coil 17 Adjust...

Page 75: ...ok assembly Adjust the button clamp lift amount 46 Thread wiper position is incorrect Thread wiper position Clearance between thread wiper and needle tip The thread wiper is obstructing the needle 48 Adjust the operating distance of the thread wiper Adjust the height of the thread wiper Thread wiper does not operate correctly 48 Lower thread winds to one side Bobbin winder thread tension stud heig...

Page 76: ...dle File smooth or replace the affected part Needle down setting Needle clearance Needle bar lift amount Bent needle Needle is touching the rotary hook Needle is striking the button Needle is bent Wayward stitches Adjust so that the needle drops down into the hole of the button Adjust the needle bar lift amount Adjust the needle clearance Replace the needle 40 46 Needle breaks Needle and thread Ne...

Page 77: ...ipped stitches occur Page Upper thread is not trimmed Thread jamming Upper thread length Upper thread tension Shuttle race thread guide position Upper thread is not properly tight Shuttle race thread guide is not separating the threads Uneven upper thread length Adjust the upper thread tension Adjust the position of the shuttle race thread tension Adjust the sub tension Poor seam finish on reverse...

Page 78: ...INSTRUCTION MANUAL Printed in Japan 151 916 S93V48 002 2000 06 H 1 BROTHER INDUSTRIES LTD 15 1 Naeshiro cho Mizuho ku Nagoya 467 8561 Japan Phone 81 52 824 2177 ...

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Brother LK3-B448E, Instruction Manual

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