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Brother International BAS-342G Instruction Manual - English - Page 81

length is uneven., the thread

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13. TROUBLESHOOTING Problem Cause Remedy Reference Upper thread is not trimmed. 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 Movable knife is not picking up the upper thread. Adjust the position of the shuttle race thread guide. Adjust the needle bar lift amount. P. 57 P. 56 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. P. 71 P. 59 Sub-tension is too weak. Turn the sub-tension nut to adjust the tension. Poor stitch finish on Shuttle race thread guide is not Adjust the position of the shuttle race underside of material. separating the threads enough. thread guide. P. 24 P. 57 Incorrect tightening of the upper thread Adjust the upper thread tension. 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. Position of arm thread guide R is Adjust the position of arm thread guide incorrect. R. Upper thread trailing Thread take-up spring tension and Adjust the tension and height of the length is uneven. 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. Sharpen the fixed knife or replace it with a new one. Sewing machine does not operate when the power is turned on and the foot switch is depressed. Safety switch does not work. Check if the safety switch cord is disconnected. Adjust the position of the safety switch. If the safety switch is malfunctioning, replace it with a new one. P. 24 P. 55 P. 56 P. 55 P. 24 P. 61 P. 12 P. 18 BAS-342G 72

Section	Page
COVER	1
SAFETY INSTRUCTIONS	3
CONTENTS	8
1. NAMES OF MAJOR PARTS	10
2. SPECIFICATIONS	11
3. TABLE PROCESSING DIAGRAM	12
4. INSTALLATION	13
4-1. Removing the machine head fixing bolts [1]	13
4-2. Installing the control box [2]	14
4-3. Installing the oil pan and support lever base	15
4-4. Installing the machine head	15
4-5. Tilting back and returning the machine head	16
4-6. Installing the gas spring	17
4-7. Installing the operation panel [3]	18
4-8. Installing the solenoid valve assembly	19
4-9. Connecting the air tubes [4]	19
4-10. Installing the air hose [5]	19
4-11. Adjusting the air pressure [6]	20
4-12. Adjusting the speed controller [7]	20
4-13. Connecting the cords [8]	21
4-14. Connecting the ground wire [9]	23
4-15. Securing the cords and air tubes [10]	24
4-16. Installing the eye guard [11]	25
4-17. Installing the cotton stand [12]	25
4-18. Lubrication [13]	26
4-19. Connecting the power cord [14]	27
4-20. Checking the safety switch [15]	27
5. PREPARATION BEFORE SEWING	28
5-1. Installing the needle	28
5-2. Operating the 2-pedal foot switch	28
5-3. Threading the upper thread	29
5-4. Winding the lower thread	31
5-5. Installing the bobbin case	32
5-6. Thread tension	33
5-6-1. Lower thread tension	33
5-6-2. Upper thread tension	33
5-7. Home position detection	34
5-8. Setting 2-step operation for the work clamp	35
6. USING THE OPERATION PANEL (BASIC OPERATIONS)	36
6-1. Name and function of each operation panel item	36
6-2. Loading sewing data	38
6-3. Setting the program number	38
6-4. Setting the X-scale and Y-scale	39
6-5. Setting the sewing speed	39
6-6. Checking the sewing pattern	40
6-7. Setting the height of the intermittent presser foot	41
7. USING THE OPERATION PANEL (ADVANCED OPERATIONS)	42
7-1. List of advanced functions	42
7-2. Setting memory switches	43
7-3. List of memory switch settings	44
7-4. Using the lower thread counter	45
7-5. Using the production counter	46
7-6. Setting the split number	47
7-7. Using user programs	48
7-8. Using cycle programs	51
7-9. Direct selection (combination table)	53
7-10. X and Y parallel movement of sewing pattern	54
7-11. Clearing memory data (reinitialization)	55
8. USING CF CARDS	56
8-1. Notes on handling CF cards (sold separately)	56
8-2. Structure of a CF card folder	56
8-3. Data read/write mode	57
8-3-1. Reading all sewing data from the CF card at once	58
8-3-2. Writing all sewing data to the CF card at once	59
9. SEWING	60
9-1. Sewing	60
9-2. Using the STOP switch	61
9-3. Using the thread wiper switch	61
10. CLEANING	62
10-1. Cleaning the rotary hook	62
10-2. Draining the oil	62
10-3. Checking the regulator	63
10-4. Cleaning the control box air inlet ports	63
10-5. Cleaning the eye guard	63
10-6. Checking the needle	63
10-7. Lubrication	63
11. STANDARD ADJUSTMENTS	64
11-1. Adjusting the thread take-up spring	64
11-2. Adjusting arm thread guide R	65
11-3. Adjusting the needle bar height	65
11-4. Adjusting the needle bar lift amount	65
11-5. Adjusting the driver needle guard	66
11-6. Adjusting the needle clearance	66
11-7. Adjusting the shuttle race thread guide	66
11-8. Adjusting the rotary hook lubrication amount	67
11-9. Adjusting the position of the movable knife	68
11-10. Replacing the movable and fixed knives	70
11-10-1. Installing the feed plate	71
11-11. Adjusting the thread wiper	71
11-12. Presser foot installation position	72
11-13. Changing the intermittent stroke	72
11-14. Adjusting the work clamp lift amount	74
11-15. Adjusting the air pressure	74
12. TABLE OF ERROR CODES	75
13. TROUBLESHOOTING	79
14. 7-SEGMENT DISPLAY	82

Match case Limit results 1 per page

13. TROUBLESHOOTING

BAS-342G

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 shuttle race

thread guide.

P. 57

Movable knife is not picking up the

upper thread.

Adjust the needle bar lift amount.

P. 56

Movable knife is not picking up the

upper thread because the last stitch is

being skipped.

Refer to "Skipped stitches occur".

P. 71

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

Shuttle

race

thread

guide

not

separating the threads enough.

Adjust the position of the shuttle race

thread guide.

P. 57

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. 55

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. 55

Sub-tension is too weak.

Turn the sub-tension nut to adjust the

tension.

P. 24

Upper

thread

trailing

length is uneven.

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 61

Check if the safety switch cord is

disconnected.

P. 12

Adjust the position of the safety switch.

P. 18

Sewing machine does

not operate when the

power is turned on and

the

foot

switch

depressed.

Safety switch does not work.

If the safety switch is malfunctioning,

replace it with a new one.