Page 2 - SAFETY INSTRUCTIONS; Safety indications and their meanings; ) indicates something that you must not do.; CAUTION
i LK3-B434E Mark II Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instruc-tions below and the explanations given in the instruction manual. With industrial sewing machines, it is normal to carry out work while positioned directly in fr...
Page 3 - ii; 0% of the rated voltage for the machine.; Environmental requirements; Hold the machine head with both hands when tilting it; Installation; DANGER
ii LK3-B434E Mark II Use the sewing machine in an area which is free fromsources of strong electrical noise such as high-frequency welders.Sources of strong electrical noise may cause prob-lems with correct operation. Any fluctuations in the power supply voltage shouldbe within ± 10% of the rated vo...
Page 4 - iii; machine unattended; Sewing
iii LK3-B434E Mark II CAUTION Set the needle to the needle up stop position beforeturning off the power.If this is not done, the wiper may strike the needle,which might cause the needle to break. Turn off the power switch before carrying out cleaning,otherwise the machine may operate if the foot swi...
Page 5 - iv; Safety devices
iv LK3-B434E Mark II Safety devices Eye guardFinger guardThread take-up coverThread take-up solenoid coverBelt coverMotor cover, etc. 2 Moving partsmay cause injury. Operate with safety devices.Turn off main switch before threading, changing bobbin and needle, cleaning etc. 3 Be sure to connect the ...
Page 6 - CONTENTS; CHECKING THE SEWING PATTERN
LK3-B434E Mark II CONTENTS 1. NAME OF EACH PART ............................... 0 1 2. SPECIFICATIONS ......................................... 0 2 2-1. Specifications ....................................... 2 2-2. Examples of sewing patterns ............. 3 3. INSTALLATION ............................
Page 8 - Heavy materials
2 LK3-B434E Mark II 2. SPECIFICATIONS 2-1. Specifications 2. SPECIFICATIONS Maximum sewing speed Maximum pattern size Feed mechanism Stitch length Number of stitches Maximum stitch number Work clamp lifter Work clamp height Rotary hook Wiper device Thread trimmer device Data storage method P-ROM (An...
Page 10 - • Use the power table which has been specially designed
4 LK3-B434E Mark II 3. INSTALLATION 3. INSTALLATION Machine installation should only be carriedout by a qualified technician. Contact your Brother dealer or a qualifiedelectrician for any electrical work that mayneed to be done. The sewing machine head weighs more than49 kg. The installation should ...
Page 11 - Tighten the nuts
5 LK3-B434E Mark II q w e r y u q e Table 1 mm t 3-2. Installing the motor Install the motor u to the work table with the four ac- cessory bolts q , cushions w , cushion collars e , flat washers r , spring washers t and nuts y . At that time, fix by setting bolts q a little to the right of oval hole...
Page 17 - R E S E T
11 LK3-B434E Mark II 3. INSTALLATION 11. Replace PROM control assembly with one which contains sewing data. 1) Use the special tool to remove the PROM control assembly !4 from the PROM socket !5 . * Store the removed PROM control assembly in the special case provided. 2) Bend the pins of the PROM co...
Page 18 - and then pass it through the work table hole.
12 LK3-B434E Mark II 3. INSTALLATION 3-14. Piping (for pneumatic) Connect air tubes in accordance with the identified numbers in the figure. At this time, pass the air tubesthrough the hole q and then pass it through the work table hole. * After connecting the air tubes, bind them together with the ...
Page 20 - may stretch slightly when it is first used,
14 LK3-B434E Mark II r Approx. 9 - 10 mm10N V-belt Motor A B 3-15. Installing the V-belt Approx. 1 mm Sewingmachine 1. Gently tilt back the machine head, and then place the V-belt q into the V grooves on the machine head pulley w and the motor pulley e . NOTE: After tilting back the machine head, do...
Page 24 - Install the eye guard assy
18 LK3-B434E Mark II 3. INSTALLATION CAUTION 3-21. Installing the eye guard Attach all safety devices before using the sewing machine.If the machine is used without these devices attached, injury may result. e w q Install the eye guard assy w to the face plate q with the two screws e .
Page 25 - until it is slightly soaked.
19 LK3-B434E Mark II Turn off the power switch before starting lubricating, otherwise the machine may operate if thefoot switch is depressed by mistake, which could result in injury. Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, sothat they do not get in...
Page 26 - -1. Name and function of each operation panel item; S E L E C T; POWER; to; is pressed to shown the program
20 LK3-B434E Mark II 5. OPERATION 5-1. Name and function of each operation panel item S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series q w re t y u i o !0 !1 !4 q POWER indicator .................. Illuminates when the power switch ...
Page 27 - is pressed to shown the speed set-
21 LK3-B434E Mark II S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series y i o !0 !1 !4 !2 !3 i X-SCALE indicator ................ Illuminates when the SELECT switch y is pressed to shown the X-scale set- ting. o Y-SCALE indicator .......
Page 28 - Preparation; * T h e n e e d l e r a c k i n g w i d t h f o r
22 LK3-B434E Mark II 5-2. Operating procedure Program No. X-scale (%) Y-scale (%) Speed (rpm) Factory default 0 * 1 100 100 2000 Variable range 100 - * 2 20 - 200 20 - 200 1,000 - 2,500 Press the SELECT switch y until the PROGRAM NO. in-dicator illuminates. P r e s s t h e D I S P L A Y S E Tswitche...
Page 29 - * The work clamp lowering pattern can be set to a
23 LK3-B434E Mark II 5. OPERATION 5-3. Operating the foot switch ■ Single-pedal foot switch (two steps) When the foot switch is depressed to step 1, the workclamp is lowered, and when it is depressed to step 2,sewing starts. 1st step 2nd step 1st step 2nd step Start switch Work clamp switch Start sw...
Page 31 - When checking by operating only the feed mechanism; Depress the foot switch to the second step.
25 LK3-B434E Mark II 1. Turn on the power switch. (The POWER indicator will illuminate and the program number will flash in the display window.) 2. Press the TEST switch. (The TEST indicator will illuminate.) 4. Depress the foot switch to the second step. Only the feed mechanism will move. [Check th...
Page 32 - For inner clamping device, use only the DP
26 LK3-B434E Mark II 7. CORRECT USE 7-1. Selecting the needle and thread DP × 5 #14 DP × 17NY #19 Thread #80 - #50 #50 - #20 Main application Medium materials Heavy materials Needle q w 9 10 11 q w Approx. 40 mm [When using the liquid cooling tank] Turn off the power switch before threading the thre...
Page 34 - -5. Replacing the bobbin case and threading the thread
28 LK3-B434E Mark II Turn off the power switch before removing and replacing the bobbin case, otherwise the machinemay operate if the foot switch is depressed by mistake and serious injury could result. q 30 mm Upper thread Lower thread Upper thread tension (N) Lower thread tension (N) Thread take-u...
Page 36 - Turn the tension stud
30 LK3-B434E Mark II Lower Higher q Become greater Become less q w w q e q Weaker Stronger 7-6-4. Thread take-up spring height 7-6-5. Thread take-up spring tension Loosen the set screw q and turn the tensioner body to adjust the thread take-up spring height. Turn the tension stud q with a screwdri...
Page 38 - MAINTENANCE AND INSPECTION
32 LK3-B434E Mark II r 9. MAINTENANCE AND INSPECTION 9. MAINTENANCE AND INSPECTION CAUTION Turn off the power switch before carrying out cleaning, otherwise the machine may operate if thefoot switch is pressed by mistake, which could result in injury. Be sure to wear protective goggles and gloves wh...
Page 39 - Be sure to let the machine operate for a while after adding the oil.
33 LK3-B434E Mark II 9. MAINTENANCE AND INSPECTION 9-2. Lubrication NOTE1: Fill the machine with oil when the oil level is down to about 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 duringoperation. NOTE2...
Page 40 - -4. Cleaning the control box air inlet port
34 LK3-B434E Mark II 9. MAINTENANCE AND INSPECTION q 9-3. 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. 9-4. Cleaning the control box air inlet port Use a vacuum cleaner to c...
Page 41 - STANDARD ADJUSTMENTS; DP
35 LK3-B434E Mark II Maintenance and inspection of the sewingmachine should only be carried out by a quali-fied technician. Ask your Brother dealer or a qualified electri-cian to carry out any maintenance and inspec-tion of the electrical system. Turn off the power switch and disconnect thepower cor...
Page 42 - 0-5. Adjusting the shuttle race thread guide
36 LK3-B434E Mark II q 0.01 - 0.08 mm Tip Needle center line 10-3. Adjusting the driver needle guard Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the setscrew w and turn the eccentric shaft e to adjust so that the driver needle guard q contacts...
Page 46 - 0-8. Adjusting the work clamp lift amount
40 LK3-B434E Mark II 10. STANDARD ADJUSTMENTS 10-8. Adjusting the work clamp lift amount The maximum work clamp lift amount is 17 mm (25mm for pneumatic, 17 mm for machines with innerclamping device) from the top of the needle plate.The lift amount is adjusted as shown in the table atthe time of shi...
Page 47 - 0-10. Adjusting the needle up stop position; The screw
41 LK3-B434E Mark II 10. STANDARD ADJUSTMENTS 10-9. Work clamp interchangeability The BAS-311E work clamp can also be used with theB434E Mark ll.Replace the feed bar guide cover q with the feed bar guide cover assembly, LL w (optional). Then, change the installation position for the presserarm assem...
Page 49 - 0-12. Checking the input sensor and DIP switch input
43 LK3-B434E Mark II 1. When the X-SCALE indicator q is illuminated and the RESET switch e is pressed while the TEST switch w is being pressed, the state of the X home position signal will appear on the display window r . · When sensor is ON · When sensor is OFF 2. Each time the SELECT switch t is p...
Page 51 - is flashing. The stitch pattern will not be moved at this time.
45 LK3-B434E Mark II S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 B430E Series POWER r e q y t o w u i 10-15. Moving stitch patterns • Programs which have already been programmed can be moved up, down and to the left and right. (How- ever, such pa...
Page 52 - Adjustment of the positioning plates; 0-17. Adjustment of inner clamping device; Adjustment of the presser crank horizontal position
46 LK3-B434E Mark II 10-16. Adjustment of air pressure (for pneumatic) 1. Air pressure should be 0.5 Mpa. The air pressure can be adjusted by pulling up andturning the control knob w on the integrator q . After adjustment is complete, push the controlknob w downward to lock it. 2. Adjust the air pre...
Page 53 - USING THE COUNTERS
47 LK3-B434E Mark II 11. USING THE COUNTERS 11-1. Using the bobbin thread counter S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series r e y t q S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3...
Page 54 - CHANGING FUNCTIONS USING THE DIP SWITCHES
48 LK3-B434E Mark II q DIPA-1 DIPA-2 DIPA-3 DIPA-4 DIPA-5 DIPA-6 DIPA-7 DIPA-8 Motion when set to ON See “14. Setting the presser mode” Presser does not automatically lift after sewing is completed. Pedal mode is switched. User program mode is available. – The presser does not rise automatically whe...
Page 55 - 2-2. DIP switches inside the control box
49 LK3-B434E Mark II q DIPB-1 DIPB-2 DIPB-3 DIPB-4 DIPB-5 DIPB-6 DIPB-7 DIPB-8 Motion when set to ON First two stitches are sewn at a low speed of 260 rpm. Last two stitches are sewn at a low speed of 260 rpm. – Last two stitches are sewn at a low speed of 700 rpm. First two stitches are sewn at a l...
Page 56 - Recording a user program
50 LK3-B434E Mark II 12-3. Using user programs Recording a user program 8. Press the DISPLAY SET switches !0 to select the Y scale setting that you would like to record. 7. Press the SELECT switch e . * The Y-SCALE indicator y will illuminate. 6. Press the DISPLAY SET swithes !0 to select the X scal...
Page 58 - CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES; Memory switches 00 - 0F
52 LK3-B434E Mark II S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series r t w y e 13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES The functions of the switches on the operation panel q can be changed to carry out special func...
Page 59 - Solenoid Pneumatic
53 LK3-B434E Mark II 13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES ■ Memory switches 10 - 1F ■ Memory switches 20 - 2F memo-10 - memo-11 memo-12 memo-13 memo-14 memo-15 memo-16 memo-17 memo-18 memo-19 memo-1A memo-1b memo-1c memo-1d memo-1E memo-1F Solenoid Pneumatic -- -- -- ON -- -- -- ...
Page 62 - When “c1-1” is flashing in the display; Using a cycle sewing program; Press the RESET switch
56 LK3-B434E Mark II 13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES 1. When “c1-1” is flashing in the display window !0 , press the foot switch to the second step. 2. Start sewing. 3. “c1-1”, “c1-2”, “c1-3” are sewn in order for each article, and when the last-recorded pattern has been sew...
Page 63 - SETTING THE WORK CLAMP MODE; ON
57 LK3-B434E Mark II 14. SETTING THE WORK CLAMP MODE 14-1. Setting solenoid work clamp mode 14. SETTING THE WORK CLAMP MODE – ON – ON DIPA-2 – – ON ON Pedal specifications Single pedal Single pedal Two pedals Two pedals Raising the presser at the sewing end Presser is raised automatically. (factory ...
Page 64 - position small articles such as labels at this time.; Cylinder connectors
58 LK3-B434E Mark II 1B 2B 1B 2B 1A 2A 1A 2A A B D C 14. SETTING THE WORK CLAMP MODE [How to use]1. Depress the presser pedal to the 1st step to lower the pressers and apply a light pressure. You can then position small articles such as labels at this time. 2. After checking that everything is posit...
Page 66 - TABLE OF ERROR CODES
60 LK3-B434E Mark II Wait at least 5 minutes after turning off the power switch and disconnecting the power cord fromthe wall outlet before opening the face plate of the control box. Touching areas where high volt-ages are present can result in severe injury. 15. TABLE OF ERROR CODES DANGER If a mal...
Page 68 - GAUGE PARTS LIST ACCORDING TO SUBCLASSES
62 LK3-B434E Mark II 16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES The following are standard gauge parts according to each specification. (In the following table, parts marked with ★ are common with the LK3-B430E; parts with ✩ are common with the BAS-311E.) 16. GAUGE PARTS LIST ACCORDING TO SUBCLASS...
Page 70 - • Needle hole plate
64 LK3-B434E Mark II 16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES 6 156088-001 (S) 156089-001 (S) 156090-001 (S) R L Work clamp Feed plate 5 156082-001 (L) 156083-001 (L) 156084-001 (L) S54984-001 Home position standard plate S10211-001 A S51449-001 AF For medium materials For heavy materials S30926...
Page 75 - INSTRUCTION MANUAL; Printed in Japan
INSTRUCTION MANUAL Printed in Japan 118-V34 S91V34-002 2000.06. B (1) BROTHER INDUSTRIES, LTD. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177
