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Brother International LK3-B434E MKII Instruction Manual - English - Page 35

Guide to maximum sewing speed, 7-6-2. Lower thread tension, layers of denim, Ordinary materials

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Page 35 highlights

7. CORRECT USE 7-6-1. Guide to maximum sewing speed Use 8 layers of denim 12 layers of denim Max. sewing speed (rpm) 2,500 2,300 NOTE: The thread may break due to heat under some sewing conditions. If this happens, reduce the sewing speed, or use the liquid cooling tank (option). Ordinary materials 2,500 Use 8 layers of denim Ordinary materials Max. sewing speed (rpm) 2,500 2,500 7-6-2. 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 coming out of the bobbin case is held. weaker stronger q 7-6-3. Upper thread tension w Stronger Weaker Turn the tension nut q (main tension) to adjust the tension as appropriate for the material being sewn. Furthermore, turn the thread nut w (sub-tension) to adjust the remaining length of upper thread to 35 - 40 mm, when the thread take-up lever is not used. Stronger Weaker q 29 LK3-B434E Mark II

Section	Page
Go to Instruction Manual Top Page	1
SAFETY INSTRUCTIONS	2
CONTENTS	6
1. NAME OF EACH PART	7
2. SPECIFICATIONS	8
2-1. Specifications	8
2-2. Examples of sewing patterns	9
3. INSTALLATION	10
3-1. Power table	10
3-2. Installing the motor	11
3-3. Installing the motor pulley	11
3-4. Installing the control box	12
3-5. Installing the rubber cushions	13
3-6. Installing the oil pan	13
3-7. Installing the cushions	13
3-8. Installing the machine head	14
3-9. Installing the head rest	14
3-10. Installing the liquid cooling tank, optional	14
3-11. Installing the operation panel	15
3-12. Connecting the ground wire	15
3-13. Connecting the cords	16
3-14. Piping (for pneumatic)	18
3-14-1. Installing the air unit	19
3-14-2. Adjusting the speed controller	19
3-15. Installing the V-belt	20
3-16. Installing the belt cover	21
3-17. Installing the foot switch	21
3-18. Installing the motor cover	22
3-19. Installing the spool stand	22
3-20. Installing the needle sub plate	23
3-21. Installing the eye guard	24
4. LUBRICATION	25
4-1. Lubrication points	25
5. OPERATION	26
5-1. Name and function of each operation panel item	26
5-2. Operating procedure	28
5-2-1. Setting the program number	28
5-2-2. Setting the X-scale and Y-scale	28
5-2-3. Setting the sewing speed	28
5-3. Operating the foot switch	29
5-4. Operating the emergency stop switch	30
6. CHECKING THE SEWING PATTERN	31
7. CORRECT USE	32
7-1. Selecting the needle and thread	32
7-2. Installing the needle	32
7-3. Threading the upper thread	32
7-4. Winding the lower thread	33
7-5. Replacing the bobbin case and threading the thread	34
7-6. Sewing conditions and thread tension	34
7-6-1. Guide to maximum sewing speed	35
7-6-2. Lower thread tension	35
7-6-3. Upper thread tension	35
7-6-4. Thread take-up spring height	36
7-6-5. Thread take-up spring tension	36
7-6-6. Adjusting arm thread guide R	36
7-6-7. Thread take-up amount	36
8. SEWING	37
9. MAINTENANCE AND INSPECTION	38
9-1. Cleaning the rotary hook	38
9-2. Lubrication	39
9-3. Draining the oil	40
9-4. Cleaning the control box air inlet port	40
9-5. Cleaning the eye guard	40
9-6. Checking the needle	40
10. STANDARD ADJUSTMENTS	41
10-1. Adjusting the needle bar height	41
10-2. Adjusting the needle bar lift amount	41
10-3. Adjusting the driver needle guard	42
10-4. Adjusting the needle clearance	42
10-5. Adjusting the shuttle race thread guide	42
10-6. Adjusting the thread take-up amount	43
10-7. Adjusting the movable knife	43
10-7-1. Replacing the movable knife and fixed knife	44
10-7-2. Adjusting the engagement of the movable knife and fixed knife	45
10-8. Adjusting the work clamp lift amount	46
10-9. Work clamp interchangeability	47
10-10. Adjusting the needle up stop position	47
10-11. Adjusting the thread wiper	48
10-12. Checking the input sensor and DIP switch input	49
10-13. Checking the input voltage	50
10-14. Clearing all memory settings	50
10-15. Moving stitch patterns	51
10-16. Adjustment of air pressure (for pneumatic)	52
10-17. Adjustment of inner clamping device	52
11. USING THE COUNTERS	53
11-1. Using the bobbin thread counter	53
11-2. Using the production counter	53
12. CHANGING FUNCTIONS USING THE DIP SWITCHES	54
12-1. Operation panel DIP switches	54
12-2. DIP switches inside the control box	55
12-3. Using user programs	56
13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES	58
13-1. Using the cycle sewing function	61
14. SETTING THE WORK CLAMP MODE	63
14-1. Setting solenoid work clamp mode	63
14-2. Setting pneumatic work clamp mode	63
14-3. Light work clamp	64
14-4. Setting reverse work clamp mode	65
15. TABLE OF ERROR CODES	66
16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES	68
17. TROUBLESHOOTING	71
18. OPTIONAL PARTS	74