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Brother International BAS-326G PS Instruction Manual - English - Page 80

TROUBLESHOOTING, Problem, Cause, Remedy, Reference, Upper, thread, trimmed., Poor stitch finish

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12. TROUBLESHOOTING Problem Cause Remedy Reference Upper thread is not trimmed. Movable knife is not cutting cleanly. Replace with a new one. P. 59 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. 59 P. 57 P. 55 Movable knife is not picking up the upper thread because the last stitch is being skipped. Movable knife position is incorrect. Refer to "Skipped stitches occur". Adjust the position of the movable knife. Sub tension is too weak. Turn the sub tension nut to adjust the tension. Poor stitch finish on underside of material. Incorrect tightening of the upper thread. Adjust the upper thread tension. P. 70 P. 57 P. 23 P. 23 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. 23 P. 23 Lower thread tension is too weak. Adjust the lower thread tension. P. 23 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. Intermittent height of intermittent Adjust the intermittent height of the presser foot is too low. intermittent presser foot. Upper thread does not release Adjust the overlapping amount for the correctly from hook stopper. inner rotary hook and hook stopper. P. 54 P. 53 P. 30 P. 56 Feed timing is too fast. Retard the feed timing. * Select the correct needle hole plate. Upper thread forms the seam poorly. Smooth the thread path. Select the correct intermittent presser foot. Increase the thickness of the feed plate. Thread scraps and dust in rotary hook. Clean away the thread scraps and dust. Needle is too thin. Replace the needle with one with a higher count. Damage to the hook stopper. Buff the hook stopper to remove the damage, or replace the hook stopper. P. 51 71 BAS-326G PS

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	12
3-2. Installing the control box	13
3-3. Installing the oil pan	13
3-4. Installing the machine head	14
3-5. Tilting the sewing machine head	18
3-6. Installing the operation panel	18
3-7. Installing the pneumatic unit	19
3-8. Connecting the cords	20
3-9. Connecting the ground wire	22
3-10. Connecting the power cord	23
3-11. Installing the cotton stand	23
3-12. Installing the eye guard	24
3-13. Installing the motor cover	25
3-14. Lubrication	26
3-15. Installing the machine head fixing bolt	27
4. PREPARATION BEFORE SEWING	28
4-1. Installing the needle	28
4-2. Threading the upper thread	28
4-3. Foot switch operating method	29
4-4. Winding the lower thread	30
4-5. Installing the bobbin case	31
4-6. Thread tension	32
4-6-1. Lower thread tension	32
4-6-2. Upper thread tension	32
4-7. Home position detection	33
5. USING THE OPERATION PANEL(BASIC OPERATIONS)	34
5-1. Name and function of each operation panel item	34
5-2. Loading sewing data	36
5-3. Setting the program number	36
5-4. Setting the X-scale and Y-scale	37
5-5. Setting the sewing speed	37
5-6. Checking the sewing pattern	38
5-7. Setting the height of the intermittent presser foot	39
6. USING THE OPERATION PANEL(ADVANCED OPERATIONS)	40
6-1. List of advanced functions	40
6-2. Setting memory switches	41
6-3. List of memory switch settings	42
6-4. Using the lower thread counter	43
6-5. Using the production counter	44
6-6. Setting the split number	45
6-7. Using user programs	46
6-8. Using cycle programs	49
6-9. Direct selection (combination table)	51
6-10. X and Y parallel movement of sewing pattern	52
6-11. Clearing memory data (reinitialization)	53
7. USING CF CARDS	54
7-1. Notes on handling CF cards (sold separately)	54
7-2. Structure of a CF card folder	54
7-3. Data read/write mode	55
7-3-1. Reading all sewing data from the CF card at once	56
7-3-2. Writing all sewing data to the CF card at once	57
8. SEWING	58
8-1. Sewing	58
8-2. Using the STOP switch	59
8-3. Using the thread wiper switch	59
9. CLEANING	60
9-1. Cleaning the rotary hook	60
9-2. Cleaning the control box air inlet ports	60
9-3. Draining the oil	61
9-4. Cleaning the eye guard	61
9-5. Checking the needle	61
9-6. Lubrication	61
10. STANDARD ADJUSTMENTS	62
10-1. Checking the machine head switch	62
10-2. Arm thread guide R	62
10-3. Thread take-up spring	63
10-4. Adjusting the needle bar height	63
10-5. Adjusting the needle bar lift amount	64
10-6. Adjusting the needle guard	64
10-7. Adjusting the needle clearance	65
10-8. Adjusting the inner rotary hook and hook stopper overlap	65
10-9. Rotary hook lubrication amount	65
10-10. Adjusting the position of the movable knife	66
10-11. Replacing the movable and fixed knives	68
10-11-1. Installing the feed plate	69
10-12. Adjusting the thread wiper	70
10-13. Intermittent presser foot installation position	70
10-14. Changing the intermittent stroke	71
10-15. Adjusting the work clamp lift amount	73
10-16. Adjusting the air pressure	73
11. TABLE OF ERROR CODES	74
12. TROUBLESHOOTING	78
13. 7-SEGMENT DISPLAY	82

Match case Limit results 1 per page

12. TROUBLESHOOTING

BAS-326G PS

Problem

Cause

Remedy

Reference

Movable knife is not cutting cleanly.

Replace with a new one.

P. 59

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 59

Adjust the position of the movable

knife.

P. 57

Movable knife is not picking up the

upper thread.

Adjust the needle bar lift amount.

P. 55

Movable knife is not picking up the

upper thread because the last stitch is

being skipped.

Refer to "Skipped stitches occur".

P. 70

Movable knife position is incorrect.

Adjust the position of the movable

knife.

P. 57

Upper

thread

not

trimmed.

Sub tension is too weak.

Turn the sub tension nut to adjust the

tension.

P. 23

Incorrect tightening of the upper thread.

Adjust the upper thread tension.

P. 23

Poor stitch finish on

underside of material.

Upper thread trailing length is uneven.

Adjust the sub tension.

P. 23

Upper thread tension is too weak.

Adjust the upper thread tension.

P. 23

Lower thread tension is too weak.

Adjust the lower thread tension.

P. 23

Thread take-up spring tension and

height are incorrect.

Adjust the tension and height of the

thread take-up spring.

P. 54

Position of arm thread guide R is

incorrect.

Adjust the position of arm thread guide

P. 53

Intermittent

height

intermittent

presser foot is too low.

Adjust the intermittent height of the

intermittent presser foot.

P. 30

Upper

thread

does

not

release

correctly from hook stopper.

Adjust the overlapping amount for the

inner rotary hook and hook stopper.

P. 56

Feed timing is too fast.

Retard the feed timing.

Select the correct needle hole plate.

Smooth the thread path.

Select the correct intermittent presser

foot.

Upper thread forms the seam poorly.

Increase the thickness of the feed

plate.

Thread scraps and dust in rotary hook.

Clean away the thread scraps and

dust.

P. 51

Needle is too thin.

Replace the needle with one with a

higher count.

Incorrect tightening of

the thread

Damage to the hook stopper.

Buff the hook stopper to remove the

damage, or replace the hook stopper.