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Brother International BAS-326G Instruction Manual - English - Page 33

Thread tension

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4. PREPARATION BEFORE SEWING 4-5. Thread tension [Thread tension reference] Specifications Heavy-weight materials (-01[]) Upper thread #20 or similar Medium-weight materials (-02[]) #50 or similar Seatbelt (-03[]) #4 or similar Lower thread Upper thread tension (N) Lower thread tension (N) Pre-tension (N) Needle Normal sewing speed #20 or similar 1.4 − 1.8 0.1 − 0.6 DP x 17 #19 2,000 sti/min 0.2 − 0.3 #50 or similar 0.8 − 1.2 0.1 − 0.3 DP x 5 #16 2,000 sti/min #4 or similar 1.2 − 2.0 1.0 − 1.5 0.3 − 0.6 DP x 17 #25 1,300 sti/min 4-5-1. Lower thread tension Adjust the thread tension to the weakest possible tension by turning the thread tension nut (1) until the bobbin case will not drop by its own weight while the thread end coming out of the bobbin case is held. Stronger Weaker 4-5-2. Upper thread tension 2536Q 1. Turn the tension nut (1) (main tension) to adjust the tension as appropriate for the material being sewn. 2. Use the tension nut (2) (sub tension) to adjust the upper thread trailing length to about 40 mm. Stronger Weaker Stronger Weaker 2153B BAS-300G, BAS-311G, BAS-326G 24

Section	Page
COVER	1
SAFETY INSTRUCTIONS	3
[1] Safety indications and their meanings	3
[2] Notes on safety	4
[3] Warning labels	6
CONTENTS	8
1. NAMES OF MAJOR PARTS	10
2. SPECIFICATIONS	11
3. INSTALLATION	12
3-1. Table processing diagram	13
3-2. Installing the control box	14
3-3. Installing the oil pan	14
3-4. Installing the machine head	15
3-5. Tilting the sewing machine head	18
3-6. Installing the operation panel	19
3-7. Installing the treadle unit (motor-driven work clamp specifications)	20
3-8. Installing the two-pedal foot switch (pneumatic work clamp specifications)	20
3-9. Connecting the cords	21
3-10. Connecting the ground wire	23
3-11. Connecting the power cord	24
3-12. Installing the cotton stand	24
3-13. Installing the pneumatic unit (pneumatic work clamp specifications)	25
3-14. Installing the eye guard	26
3-15. Installing the motor cover	26
3-16. Lubrication	27
3-17. Installing the machine head fixing bolt	28
4. PREPARATION BEFORE SEWING	29
4-1. Installing the needle	29
4-2. Threading the upper thread	29
4-3. Winding the lower thread	31
4-4. Installing the bobbin case	32
4-5. Thread tension	33
4-5-1. Lower thread tension	33
4-5-2. Upper thread tension	33
4-6. Home position detection	34
5. USING THE OPERATION PANEL (BASIC OPERATIONS)	35
5-1. Name and function of each operation panel item	35
5-2. Loading sewing data	37
5-3. Setting the program number	37
5-4. Setting the X-scale and Y-scale	38
5-5. Setting the sewing speed	38
5-6. Checking the sewing pattern	39
5-7. Setting the work clamp lift amount	40
6. USING THE OPERATION PANEL (ADVANCED OPERATIONS)	42
6-1. List of advanced functions	42
6-2. Setting memory switches	43
6-3. List of memory switch settings	44
6-4. Using the lower thread counter	45
6-5. Using the production counter	46
6-6. Setting the split number	47
6-7. Using user programs	48
6-8. Using cycle programs	51
6-9. Direct selection (combination table)	53
6-10. X and Y parallel movement of sewing pattern	54
6-11. Clearing memory data (reinitialization)	55
7. USING CF CARDS	56
7-1. Notes on handling CF cards (sold separately)	56
7-2. Structure of a CF card folder	56
7-3. Data read/write mode	57
7-3-1. Reading all sewing data from the CF card at once	58
7-3-2. Writing all sewing data to the CF card at once	59
8. SEWING	60
8-1. Sewing	60
8-2. Using the STOP switch	61
8-3. Using the thread wiper switch	61
9. CLEANING	62
9-1. Cleaning the rotary hook	62
9-2. Cleaning the control box air inlet ports	63
9-3. Draining the oil	63
9-4. Cleaning the eye guard	63
9-5. Checking the needle	63
9-6. Lubrication	63
10. STANDARD ADJUSTMENTS	64
10-1. Checking the machine head switch	64
10-2. Thread take-up spring	65
10-3. Arm thread guide R	65
10-4. Adjusting the needle bar height	66
10-5. Adjusting the needle bar lift amount	66
10-6. Adjusting the needle contact pressure of the driver	66
10-7. Adjusting the needle clearance	67
10-8. Adjusting the shuttle race thread guide	67
10-9. Rotary hook lubrication amount	67
10-10. Adjusting the position of the movable knife	68
10-11. Replacing the movable and fixed knives	70
10-11-1. Installing the feed plate	71
10-12. Adjusting the thread wiper	72
10-13. Presser foot installation position	72
10-14. Changing the intermittent stroke	73
10-15. Adjusting the work clamp lift amount	75
10-16. Adjusting the air pressure (pneumatic work clamp specifications)	75
11. TABLE OF ERROR CODES	76
12. TROUBLESHOOTING	80
13. 7-SEGMENT DISPLAY	83