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Brother International BAS-343E Instruction Manual - English - Page 20

Lower thread tension, 6-4. Thread take-up spring height, when the end of the thread is held.

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5-6-2. Lower thread tension 5-6-3. Upper thread tension 5. Correct use Weaker Stronger Stronger Weaker Stronger Weaker Set the lower thread tension to as weak a tension as possible and so that the bobbin case drops by its own weight when the end of the thread is held. Turn the adjusting screw q to adjust the tension. NOTE If the lower thread tension is too weak, it may not be possible to cut the lower thread properly during thread trimming. Turn the tension nut w (main tension) to adjust the tension as appropriate for the material being sewn. Furthermore, turn the thread nut e (sub-tension) to adjust the remaining length of upper thread to 35 - 40 mm. 5-6-4. Thread take-up spring height 5-6-5. Thread take-up spring tension Lower Higher 8 10 mm Weaker Stronger Loosen screw r and turn the entire thread take-up unit to adjust so that the height of the thread take-up spring is 8 - 10 mm. Adjust the thread take-up spring tension by turning the tension stud t with a screwdriver. BAS-343E 13

Section	Page
Go to Instruction Manual Top Page	1
1. Name of each parts	8
2. Specifications	9
3. Preparation	10
3-1. Before setting up	10
3-2. Positioning	11
3-3. Tilting the sewing machine head	11
3-4. Connecting the ground wire	12
3-5. V-belt tension	12
3-6. Installing the foot switch	12
3-7. Installing the spool stand	13
3-8. Installing the programmer (option)	13
3-9. Adjustment of air pressure	14
4. Lubrication	15
4-1. Lubrication points	15
5. Correct use	16
5-1. Selecting the needle and thread	16
5-2. Installing the needle and running the sewing machine 5. Fill the lubricator tank w with silicone oil.	16
5-3. Threading the upper thread	17
5-4. Winding the lower thread	18
5-5. Replacing the bobbin case and threading the thread	19
5-6. Sewing conditions	19
6. Panel operation	22
6-1. Explanation of panel	22
6-2. Using the floppy disk	24
6-3. Using the program R/W (Read/Write) switch	26
6-4. Using the TEST switch (Checking the sewing pattern)	27
6-5. Using the emergency stop switch	28
6-6. Adjusting the sewing SPEED control	29
6-7. Changing the X-SCALE and Y-SCALE settings	29
6-8. Using the bobbin thread counter	30
6-9. Using production counter	31
6-10. Using single split mode	32
6-11. Shifting a stitch pattern	33
7. Sewing	34
7-1. Before starting sewing....	34
7-2. Sewing operation	34
8. Maintenance and inspection	36
8-1. Cleaning the rotary hook	36
8-2. Lubrication	36
8-3. Draining the oil	37
8-4. Cleaning the control box air inlet port	37
8-5. Cleaning the eye guard	38
8-6. Checking the needle	38
9. Standard adjustments	39
9-1. Adjusting the needle bar height adjustment	39
9-2. Adjusting the needle bar lift amount	39
9-3. Adjusting the needle clearance	40
9-4. Adjusting the driver needle gurard	40
9-5. Adjusting the shuttle race thread guide	40
9-6. Adjusting the movable knife	41
9-7. Presser foot adjustment	43
9-8. Changing the presser foot lift	44
9-9. Wiper adjustment	45
9-10. Adjusting the needle up stop position	45
9-11. Adjustment of air pressure	46
9-12. Adjusting the lubricator	46
9-13. Checking the input sensor and DIP switch input	47
9-14. Checking the input voltage	48
9-15. Clearing all memory settings	48
10. DIP switch	49
10-1. Panel DIP switch functions	49
10-2. DIP switches inside the control box	51
11. Changing special functions using the memory switches	53
12. Error codes	57
13. Gauge parts list according to subclasses	60
14. Troubleshooting	61