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the thread, Incorrect tightening

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12. TROUBLESHOOTING Problem Cause Upper thread is not trimmed. Movable knife is not cutting cleanly. Remedy Replace with a new one. Reference P. 61 Fixed knife is not cutting cleanly. Sharpen the fixed knife or replace it with a new one. Movable knife is not picking up the upper thread. Adjust the position of the movable knife. Adjust the needle bar lift amount. P. 61 P. 59 P. 57 Movable knife is not picking up the upper thread because the last stitch is Refer to "Skipped stitches occur". being skipped. Movable knife position is incorrect. Adjust the position of the movable knife. Sub-tension is too weak. Poor stitch finish on underside of material. Incorrect tightening of the upper thread Turn the sub-tension nut to adjust the tension. Adjust the upper thread tension. P. 72 P. 59 P. 24 P. 24 Upper thread trailing length is uneven. Adjust the sub-tension. Incorrect tightening of the thread Upper thread tension is too weak. Adjust the upper thread tension. P. 24 P. 24 Lower thread tension is too weak. Adjust the lower thread tension. Thread take-up spring tension and Adjust the tension and height of the height are incorrect. thread take-up spring. Upper thread trailing length is irregular. Position of arm thread guide R is Adjust the position of arm thread guide incorrect. R. Thread take-up spring tension and Adjust the tension and height of the height are incorrect. thread take-up spring. Sub-tension is too weak. Turn the sub-tension nut to adjust the tension. Fixed knife is not cutting cleanly. Sewing machine does not operate when the power is turned on and the foot switch is depressed. Machine head switch does not work. Sharpen the fixed knife or replace it with a new one. Check if the machine head switch cord is disconnected. Adjust the position of the machine head switch. If the machine head switch is malfunctioning, replace it with a new one. P. 24 P. 56 P. 56 P. 56 P. 24 P. 61 P. 12 P. 9 73 BAS-300G, BAS-311G, BAS-326G

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

Match case Limit results 1 per page

12. TROUBLESHOOTING

BAS-300G, BAS-311G, BAS-326G

Problem

Cause

Remedy

Reference

Movable knife is not cutting cleanly.

Replace with a new one.

P. 61

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 61

Adjust the position of the movable

knife.

P. 59

Movable knife is not picking up the

upper thread.

Adjust the needle bar lift amount.

P. 57

Movable knife is not picking up the

upper thread because the last stitch is

being skipped.

Refer to "Skipped stitches occur".

P. 72

Movable knife position is incorrect.

Adjust the position of the movable

knife.

P. 59

Upper

thread

not

trimmed.

Sub-tension is too weak.

Turn the sub-tension nut to adjust the

tension.

P. 24

Incorrect tightening of the upper thread

Adjust the upper thread tension.

P. 24

Poor stitch finish on

underside of material.

Upper thread trailing length is uneven.

Adjust the sub-tension.

P. 24

Upper thread tension is too weak.

Adjust the upper thread tension.

P. 24

Lower thread tension is too weak.

Adjust the lower thread tension.

P. 24

Thread take-up spring tension and

height are incorrect.

Adjust the tension and height of the

thread take-up spring.

P. 56

Incorrect tightening of

the thread

Position of arm thread guide R is

incorrect.

Adjust the position of arm thread guide

P. 56

Thread take-up spring tension and

height are incorrect.

Adjust the tension and height of the

thread take-up spring.

P. 56

Sub-tension is too weak.

Turn the sub-tension nut to adjust the

tension.

P. 24

Upper thread trailing

length is irregular.

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 61

Check if the machine head switch cord

is disconnected.

P. 12

Adjust the position of the machine head

switch.

P. 9

Sewing machine does

not operate when the

power is turned on and

the

foot

switch

depressed.

Machine head switch does not work.

the

machine

head

switch

malfunctioning, replace it with a new

one.