Brother BAS-326G PS Instruction Manual page 81

Problem
Upper thread trailing
length is irregular.
Lower thread is
protruding from the top
of the material.
Hitch stitch sewing
range is too great.
Thread trailing length
underneath the material
is too short.
Sewing machine does
not operate when the
power is turned on and
the foot switch is
depressed.
Cause
Thread take-up spring tension and
height are incorrect.
Sub tension is too weak.
Fixed knife is not cutting cleanly.
Thread take-up spring tension is too
strong.
Insufficient thread take-up amount.
Lower thread tension is too weak.
Lower thread is threaded incorrectly.
Sewing speed is too high.
Needle is incorrectly installed.
Upper thread position is incorrect.
Needle is shaking.
Fixed knife position is too close to the
needle hole plate.
Machine head switch does not work.
Adjust the tension and height of the
thread take-up spring.
Turn the sub tension nut to adjust the
tension.
Sharpen the fixed knife or replace it
with a new one.
Adjust the tension of the thread take-up
spring.
Adjust the position of arm thread guide
R.
Adjust the lower thread tension.
Pass the lower thread through the
window of the inner rotary hook.
Reduce the sewing speed.
Install the needle correctly.
Select the correct intermittent presser
foot.
Grind the cylinder of the intermittent
presser foot so that it does not touch
the thread.
Replace the needle with one with a
higher count.
Move the fixed knife position away from
the needle hole plate.
Check if the machine head switch cord
is disconnected.
Adjust the position of the machine head
switch.
If the machine
malfunctioning, replace it with a new
one.
BAS-326G PS
12. TROUBLESHOOTING
Remedy
head switch is
Reference
P. 54
P. 23
P. 59
P. 54
P. 53
P. 23
P. 22
P. 28
P. 19
P. 59
P. 11
P. 8
P. 53
72