Brother International BAS-705 Instruction Manual - English - Page 78

Adjust the tension and, the affected part.

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10. TROUBLESHOOTING Problem Cause Check Remedy Page Upper thread breaks. Skipped stitches occur. Needle breaks. Upper thread tension is too strong. Needle is installed incorrectly. Thread is too thick for the needle. Thread take-up spring tension and height are incorrect. Damaged or burred rotary hook, needle hole plate or needle. Thread path is incorrect. Upper thread tension Needle direction Thread and needle Thread take-up spring tension and height Damage or burring Thread Adjust the upper thread tension. Install the needle so that the groove is facing forward. Use the correct thread for the needle. Adjust the tension and height of the thread take-up spring. File smooth or replace the affected part. Pass the thread correctly along the thread path. Increase the thread amount. 28 24 28 29 Clearance between needle and rotary hook tip is too great. Incorrect needle and rotary hook timing. Driver is contacting needle more than is necessary. Needle is bent. Needle is installed incorrectly. Thread is twisted too strongly. Needle clearance Needle bar lift amount Clearance between driver and needle Adjust the needle clearance. Adjust the needle bar lift amount. Adjust the driver needle guard. Bent needle Replace the needle. Needle direction Install the needle so that the groove is facing forward. Winding direction of thread along thread path. Set the correct thread winding direction for the thread path. Needle is touching the rotary hook. Needle is bent. Needle clearance Needle bar lift amount Bent needle Adjust the needle clearance. Adjust the needle bar lift amount. Replace the needle. 39 37 Needle is too thin. Needle and thread Needle moves about. Needle and thread Feed plate fixing screw is not correctly tightened. Feed plate Use the correct needle for the material. Select the correct needle for the sewing conditions. Reduce the sewing speed. Install the feed plate securely. ʕ 75 ʕ B A S -705

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10. TROUBLESHOOTING
―
75
―
BAS-705
Needle clearance
Needle bar lift amount
Clearance between
driver and needle
Bent needle
Needle direction
Needle clearance
Needle bar lift amount
Bent needle
Needle and thread
Damage or burring
Thread take-up spring
tension and height
Thread and needle
Needle direction
Upper thread tension
Upper thread tension is
too strong.
Needle is installed
incorrectly.
Thread is too thick for
the needle.
Thread take-up spring
tension and height are
incorrect.
Damaged or burred
rotary hook, needle hole
plate or needle.
Clearance between
needle and rotary hook
tip is too great.
Incorrect needle and
rotary hook timing.
Driver is contacting
needle more than is
necessary.
Needle is bent.
Needle is installed
incorrectly.
Needle is touching the
rotary hook.
Needle is bent.
Needle moves about.
Needle breaks.
Skipped stitches occur.
Adjust the needle
clearance.
�
Adjust the needle bar lift
amount.
�
Adjust the driver needle
guard.
�
Replace the needle.
�
Install the needle so that
the groove is facing
forward.
�
Adjust the needle
clearance.
39
Adjust the needle bar lift
amount.
37
Replace the needle.
�
Select the correct needle
for the sewing conditions.
Reduce the sewing speed.
�
File smooth or replace
the affected part.
�
Adjust the tension and
height of the thread
take-up spring.
29
Use the correct thread
for the needle.
28
Install the needle so that
the groove is facing
forward.
24
Adjust the upper thread
tension.
28
Upper thread breaks.
Problem
Cause
Check
Remedy
Needle and thread
Needle is too thin.
Use the correct needle
for the material.
�
Page
Feed plate fixing screw
is not correctly tightened.
�
Feed plate
Install the feed plate
securely.
�
Thread is twisted too
strongly.
Winding direction of
thread along thread path.
Set the correct thread
winding direction for the
thread path.
�
Thread
Thread path is incorrect.
�
Pass the thread correctly
along the thread path.
Increase the thread amount.