Brother S-1110A, Инструкция по эксплуатации

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S-1110A
11. TROUBLESHOOTING
24
Problem Possible cause Page
9 Lower thread is tangled at
the sewing start.
y
Is the bobbin spinning direction correct when the lower thread is
being pulled?
Set the bobbin so that it turns in the opposite direction to the
rotary hook.
y Is there too much thread
wound onto the bobbin?
The bobbin winding
amount should not be
more that 80 %.
y Is the bobbin turning smoothly?
If the bobbin is not turning smoothly, replace the bobbin.
10
10
10 Upper and lower threads
are breaking.
y Is the needle bent or is the needle tip broken?
Replace the needle if it is bent or broken.
y Is the needle properly installed?
If it is incorrect, install the needle correctly.
y Is the machine properly threaded?
If it is incorrect, thread the thread correctly.
y Is the upper or lower thread tension too weak or too strong?
Adjust the upper thread or lower thread tension.
y Is the upper thread may be loose because the thread take-up spring
operating range is too small?
Adjust the position of the thread take-up spring.
y Is the rotary hook, feed dog or other part damaged?
If they are damaged, smooth them with an oiled grindstone or
replace the damaged parts.
y Is the thread path damaged?
If the thread path is damaged, smooth it with sandpaper or
replace the damaged part.
9
11
13
16*
*
*
11 Broken needles y Is the material being pushed or pulled with excessive force during
sewing?
y Is the needle properly installed?
If it is incorrect, install the needle correctly.
y Is the needle bent, is the needle tip broken, or is the needle hole
blocked?
Replace the needle.
y
Is the needle and rotary hook timing correct?
Adjust the height of the needle bar.
Adjust the clearance between the needle and the tip of the
rotary hook.
y Is the needle timing too advanced with respect to the feed dog?
Retard the needle timing.
y It is extremely dangerous to leave any pieces of broken
needle sticking in the material. If the needle breaks, search
for all pieces until the whole of the needle is found again.
y Furthermore, we recommend we recommend that through
steps be taken to account for such needles to comply with
product liability regulations.
9
19*
20*
19*
Lower
thread
0751M
0471M
2124M
Caution
0469M