Brother International BAS-326G PS Instruction Manual - English - Page 79

TROUBLESHOOTING, Problem, Cause, Remedy, Reference, Upper thread breaks., Skipped stitches occur.

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12. TROUBLESHOOTING Problem Upper thread breaks. Cause Upper thread tension is too strong. Remedy Adjust the upper thread tension. Reference P. 23 Needle is incorrectly installed. Install the needle correctly. P. 19 Thread is too thick for the needle. Select a thread that matches the needle. Thread take-up spring tension and Adjust the tension and height of the height are incorrect. thread take-up spring. Damage or burring of the rotary hook, needle hole plate, needle or thread path. Repair or replace the problem part. Thread breaking from heat (Synthetic thread). Use a needle cooler. Thread is threaded incorrectly. Thread the thread correctly. Damage to the hook stopper. Lower thread breaks. Lower thread tension is too strong. Buff the hook stopper to remove the damage, or replace the hook stopper. Adjust the lower thread tension. Damage to the needle hole plate or bobbin case. Repair or replace the problem part. Skipped stitches occur. Clearance between needle and rotary hook tip is too great. Adjust the needle clearance. Needle and incorrect. rotary hook timing is Adjust the needle bar lift amount. The needle guard is covering the needle more than necessary. Adjust the needle guard. Needle is bent. Replace the needle. P. 23 P. 54 P. 19 P. 19 P. 23 P. 56 P. 55 P. 55 Needle is broken. Needle is incorrectly installed. Install the needle correctly. Intermittent height of intermittent presser Adjust the intermittent height of the foot is too high. intermittent presser foot. Clearance between needle and rotary hook tip is too great. Adjust the needle clearance. Adjust the needle bar lift amount. P. 19 P. 30 P. 56 P. 55 Thread jamming. Needle is bent. Replace the needle. Needle deflection Needle is too thin. Select a needle that is suitable for the sewing conditions. Reduce the sewing speed. Select a needle that is suitable for the sewing conditions. Thread take-up spring tension and Adjust the tension and height of the height are incorrect. thread take-up spring. Needle and incorrect. rotary hook timing is Adjust the needle bar lift amount. P. 23 P. 23 P. 54 P. 55 BAS-326G PS 70

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12. TROUBLESHOOTING
BAS-326G PS
70
Problem
Cause
Remedy
Reference
Upper thread tension is too strong.
Adjust the upper thread tension.
P. 23
Needle is incorrectly installed.
Install the needle correctly.
P. 19
Thread is too thick for the needle.
Select a thread that matches the needle.
P. 23
Thread
take-up
spring
tension
and
height are incorrect.
Adjust the tension and height of the
thread take-up spring.
P. 54
Damage or burring of the rotary hook,
needle hole plate, needle or thread path.
Repair or replace the problem part.
Thread breaking from heat
(Synthetic thread).
Use a needle cooler.
P. 19
Thread is threaded incorrectly.
Thread the thread correctly.
P. 19
Upper thread breaks.
Damage to the hook stopper.
Buff the hook stopper to remove the
damage, or replace the hook stopper.
Lower thread tension is too strong.
Adjust the lower thread tension.
P. 23
Lower thread breaks.
Damage to the needle hole plate or
bobbin case.
Repair or replace the problem part.
Clearance between needle and rotary
hook tip is too great.
Adjust the needle clearance.
P. 56
Needle
and
rotary
hook
timing
is
incorrect.
Adjust the needle bar lift amount.
P. 55
The needle guard is covering the needle
more than necessary.
Adjust the needle guard.
P. 55
Needle is bent.
Replace the needle.
Needle is incorrectly installed.
Install the needle correctly.
P. 19
Skipped stitches occur.
Intermittent height of intermittent presser
foot is too high.
Adjust the intermittent height of the
intermittent presser foot.
P. 30
Adjust the needle clearance.
P. 56
Clearance between needle and rotary
hook tip is too great.
Adjust the needle bar lift amount.
P. 55
Needle is bent.
Replace the needle.
Needle deflection
Select a needle that is suitable for the
sewing conditions.
Reduce the sewing speed.
P. 23
Needle is broken.
Needle is too thin.
Select a needle that is suitable for the
sewing conditions.
P. 23
Thread
take-up
spring
tension
and
height are incorrect.
Adjust the tension and height of the
thread take-up spring.
P. 54
Thread jamming.
Needle
and
rotary
hook
timing
is
incorrect.
Adjust the needle bar lift amount.
P. 55