Brother International BAS-343E Instruction Manual - English - Page 62

facing forward.tube., Needle is bent.

Get Brother International BAS-343E PDF manuals and user guides View all Brother International BAS-343E manuals
Add to My Manuals
Save this manual to your list of manuals

Page 62 highlights

14. Troubleshooting Problem Cause Check Remedy Page Upper thread breaks. Lower thread breaks. Skipped stitchesç 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. incorrect. Damaged or burred rotary hook, needle hole plate or needle. Thread melting (synthetic thread) Thread path is incorrect. Upper thread tension Needle direction Thread and needle Thread take-up spring tension and height Damage or burring Thread edge Thread Lower thread tension is too strong. Corners of needle hole plate or bobbin case are damaged. Lower thread tension Damage 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 clearance Needle bar lift amount Clearance between driver and needle Bent needle Needle is installed incorrectly. Needle direction Neelde is touching the rotary hook. Needle clearance Needle bar lift amount Needle is bent. Bent needle Needle moves about. Needle and threa Needle is too thin. Needle and thread BAS-343E Adjust the upper thread tension. ç 13 Install the needle so that the groove is 9 facing forward. Use the correct thread for the needle. 12 Adjust the tension and height of the thread 13 take-up spring. File smooth or replace the affected part. Use a thread cooling device. 10 Pass the thread correctly along the 10 thread path. Adjust the lower thread tension. amount. 13 File smooth or replace the affected part. Adjust the needle clearance. the affected 33 Adjust the needle bar lift amount. 32 Adjust the driver needle guard. 33 Replace the needle. Install the needle so that the groove is 9 facing forward.tube. Adjust the needle clearance. the groove 33 Adjust the needle bar lift amount. 32 Replace the needle. Select the correct needle for the sewing conditions. 12 Reduce the sewing Use the correct needle for the material. 12 55

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
14. Troubleshooting
55
BAS-343E
Upper thread tension
Needle direction
Needle clearance
Thread and needle
Thread
Thread take-up spring
tension and height
Clearance between
driver and needle
Needle bar lift amount
Check
Remedy
Problem
Cause
Thread is too thick for
the needle.
Upper thread tension
is too strong.
Thread take-up spring
tension and height are
incorrect.
incorrect.
Thread path is incorrect.
Corners of needle hole
plate or bobbin case
are damaged.
Clearance between
needle and rotary hook
tip is too great.
Incorrect needle and
rotary hook timing.
Needle is installed
incorrectly.
Driver is contacting
needle more than is
necessary.
33
32
33
10
13
12
9
Adjust the upper
thread tension.
Adjust the driver
needle guard.
Adjust the needle
clearance. the affected
Pass the thread
correctly along the
thread path.
Adjust the needle bar
lift amount.
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.
Install the needle so
that the groove is
facing forward.
13
Page
Upper thread breaks.
Skipped stitches
�
�
�
Needle direction
Bent needle
Needle is bent.
9
Install the needle so
that the groove is
facing forward.tube.
Replace the needle.
Needle clearance
Bent needle
Needle bar lift amount
Needle is bent.
Needle moves about.
Neelde is touching the
rotary hook.
33
32
�
Replace the needle.
Adjust the needle
clearance. the groove
Adjust the needle bar
lift amount.
Needle breaks.
Needle and thread
Needle and threa
Needle is too thin.
12
12
Use the correct needle
for the material.
Select the correct needle
for the sewing conditions.
Reduce the sewing
Damage
Lower thread tension
Lower thread tension
is too strong.
13
�
File smooth or replace
the affected part.
Adjust the lower thread
tension. amount.
Lower thread breaks.
Thread melting
(synthetic thread)
Damaged or burred
rotary hook, needle
hole plate or needle.
Use a thread cooling
device.
Thread edge
Damage or burring
Needle is installed
incorrectly.
10