Needle Breaks; Noise; Forward And Reverse Feedings Differ; Improper Length Of Buttonhole Legs - Brother BL6200 Service Manual

PROBLEM
8.

Needle breaks.

9.

Noise.

10. Forward and
reverse feedings
differ.
11. Improper length of
buttonhole legs.
12. Improper
buttonhole size
against button size.
13. Unbalanced
patterns.
14. Needle hits needle
plate when pattern
selector dial is
turned.

15. Fabric gathers.

16. The stitch shown in
the pattern
indication window
is different from
the one being
sewn.
CAUSE
1. Touch pattern dial while needle is in
the fabric.
2. Needle hits inner rotary hook.
3. Needle hits needle plate.
4. Bent or blunt needle.
5. Improper clearance between the needle
and the outer rotary hook.
6. Machine feeds while needle is in the
fabric.
7. Needle flows.
8. Fabric is pulled excessively.
1. Play of worm/pattern cam gear.
2. Play of lower shaft.
3. Play of upper shaft.
4. Noise from rotary hook.
1. Improper adjustment of revers sewing
lever.
1. Improper adjustment.
1. Improper adjustment of buttonhole
length.
1. Stitch length dial is not set at ''4''.
2. Feed dog is worn out.
3. Improper height of feed dog.
4. Improper attachment of feed dog.
5.

Forward and reverse feedings differ.

6. Stitch width dial is not set to "5".
1. Release volume is too big.
1. Thread tension is too tight.
2. Blunt needle.
3. Improper combination of needle/
thread/fabric.
4. Improper threading.
1. Release volume is too small.
2. The indicate gear and pattern indicator
plate are not aligned correctly.
Operate machine correctly.
Adjust the position of inner rotary hook
stopper.
* Refer to P.30.
Make sure the correct needle is used.
* Refer to P.27, P.37.
Change needle.
Refer to P.28.
Refer to P.25, P.26.
Refer to P.27.
Guide the fabric.
Adjust to proper gearing.
Adjust play of the lower shaft.
Adjust play of the upper shaft.
Clean the race of inner rotary hook and
outer rotary hook or replace inner rotary
hook.
Refer to P.46.
Adjust screw.
* Refer to P.42.
Adjust the length of buttonhole.
* Refer to P.44.
Operate machine correctly.
Change the feed dog.
* Refer to P.31, P.32.
Refer to P.32.
Attach the feed dog correctly.
Refer to P.40.
Operate machine correctly.
Adjust the release volume.
* Refer to P.37.
Reduce the tension.
Change the needle.
Select correct combination of needle/
thread/fabric.
Reset threading correctly.
Adjust the release volume.
* Refer to P.37.
Adjust the pattern indicator.
* Refer to P.36.
- 14 -
CORRECTION