Brother International BAS-311F-L Instruction Manual - English - Page 75

Troubleshooting

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14. TROUBLESHOOTING 14. TROUBLESHOOTING Problem Cause Check Remedy Page Presser does not rise. Work clamp operation Sliding part of the work Grease the sliding part of is sluggish. clamp lubrication the work clamp. Presser lifter air tube is bent or damaged.* Pressure lifter air tube Straighten the bend in the tube or replace the tube. 18 Presser lifter link is not Link return spring is Hook the link return moving back. unhooked. spring properly. Presser does not drop. Work clamp operation Sliding part of the work Grease the sliding part of is sluggish. clamp lubrication the work clamp. Presser lifter air tube is bent or damaged.* Presser lifter air tube Straighten the bend in the tube or replace the tube. 18 Presser lift amount is Incorrect position of incorrect. presser arm lever F. Distance between work clamp and top of needle plate Adjust the work clamp lift amount. 49 Solenoid-type work clamp lifts up without clamping the material. Work clamp pressure is too light. Check the setting of the memory switch (memo-35). Increase the setting value of the memory switch (memo-35). 62 Thread wiper does not The thread wiper is obstructing the needle. Clearance between thread wiper and needle tip Adjust the height of the thread wiper. 48 operate correctly. Thread wiper position is incorrect. Thread wiper position Adjust the operating distance of the thread wiper. 48 Lower thread winds to one side. Bobbin winder thread tension stud heights is incorrect. Bobbin winder thread tension stud height Adjust the height of the thread tension stud. 23 Lower thread winding amount is incorrect. Bobbin presser position is incorrect. Thread winding amount Adjust the position of the bobbin presser. 23 Stitches being skipped Refer to "Skipped at the sewing start. stitches occur". Refer to "Skipped stitches occur". Thread slips out of the needle. Uneven upper thread length. Upper thread length Adjust the sub-tension. 25 Position of shuttle race thread guide is incorrect Position of shuttle race thread guide Adjust the position of the shuttle race thread guide 43 *.........For Air type 68 BAS-311F-0, 311F-L, 326F-0

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14. TROUBLESHOOTING
BAS-311F-0, 311F-L, 326F-0
68
14. TROUBLESHOOTING
*
.........
For Air type
Problem
Cause
Check
Remedy
Page
Work clamp operation
is sluggish.
Sliding part of the work
clamp lubrication
Presser lifter air tube is
bent or damaged.*
Pressure lifter air tube
Presser lifter link is not
moving back.
Link return spring is
unhooked.
Presser does not drop.
Work clamp operation
is sluggish.
Sliding part of the work
clamp lubrication
Presser lifter air tube is
bent or damaged.*
Presser lifter air tube
Grease the sliding part of
the work clamp.
Straighten the bend in the
tube or replace the tube.
Hook
the
link
return
spring properly.
Grease the sliding part of
the work clamp.
Straighten the bend in the
tube or replace the tube.
18
18
Presser does not rise.
Incorrect position of
presser arm lever F.
Distance between work clamp
and top of needle plate
Work clamp pressure is
too light.
Check the setting of the
memory switch (memo-35).
The thread wiper is
obstructing the needle.
Clearance between thread
wiper and needle tip
Thread wiper position is
incorrect.
Thread wiper position
Adjust the work clamp lift
amount.
49
Increase the setting value
of
the
memory
switch
(memo-35).
62
Adjust the height of the
thread wiper.
48
Adjust the operating distance
of the thread wiper.
48
Lower thread winds to
one side.
Bobbin
winder
thread
tension stud heights is
incorrect.
Bobbin winder thread
tension stud height
Lower thread winding
amount is incorrect.
Bobbin presser position
is incorrect.
Thread winding amount
Adjust the height of the
thread tension stud.
23
Adjust the position of the
bobbin presser.
23
Stitches being skipped
at the sewing start.
Refer to “Skipped
stitches occur”.
Thread slips out of the
needle.
Uneven upper thread
length.
Upper thread length
Position of shuttle race
thread guide is incorrect
Position of shuttle race
thread guide
Refer to “Skipped
stitches occur”.
Adjust the sub-tension.
25
Adjust the position of the
shuttle race thread guide
43
Thread wiper does not
operate correctly.
Presser lift amount is
incorrect.
Solenoid-type work clamp
lifts up without clamping
the material.