Brother International KE-436C Instruction Manual - English - Page 69

TROUBLESHOOTING, Thread wiper does

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15. TROUBLESHOOTING 15. TROUBLESHOOTING CAUTION Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the machine will operate if the foot switch is depressed by mistake, which could result in injury. Problem Cause Check Remedy Work clamp does not Work clamp operation is Sliding part of the work Grease the sliding part of rise. sluggish. clamp lubrication the work clamp. Work clamp lift amount is too great. Distance between work clamp and top of needle plate Adjust the height of the work clamp to within 25 mm. Work clamp is contacting Thread wiper standby Adjust the position of the thread wiper. position thread wiper. Work clamp lift amount is incorrect. Thread wiper does not operate correctly. Incorrect position of presser arm lever plate. The thread wiper is obstructing the needle. Distance between work clamp and top of needle plate Clearance between thread wiper and needle tip Thread wiper position Adjust the work clamp lift amount. Adjust the height of the thread wiper. Adjust the operating distance of the thread wiper. Thread wiper position is incorrect. Thread wiper position Adjust the operating distance of the thread wiper. Lower thread winds to one side. Lower thread winding amount is incorrect Bobbin winder thread tension stud height is incorrect. Bobbin presser position is incorrect. Bobbin winder thread tension stud height Thread winding amount Adjust the height of the thread tension stud. Adjust the position of the bobbin presser. Thread comes un- Stitches being skipped at Refer to "Skipped stitches Refer to "Skipped stitches threaded. the sewing start. occur" occur" Uneven length. upper thread Upper thread length Adjust the sub-tension. Upper thread is too short. Thread stroke take-up lever Adjust the thread take-up lever stroke. Page 44 44 47 44 47 47 47 30 30 64 32 41 63 KE-436C

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15. TROUBLESHOOTING
63
KE-436C
15. TROUBLESHOOTING
CAUTION
Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the machine
will operate if the foot switch is depressed by mistake, which could result in injury.
Problem
Cause
Check
Remedy
Page
Work clamp operation is
sluggish.
Sliding part of the work
clamp lubrication
Grease the sliding part of
the work clamp.
44
Work clamp lift amount is
too great.
Distance between work
clamp and top of needle
plate
Adjust the height of the
work clamp to within 25
mm.
44
Work clamp does not
rise.
Work clamp is contacting
thread wiper.
Thread
wiper
standby
position
Adjust the position of the
thread wiper.
47
Work clamp lift amount
is incorrect.
Incorrect
position
of
presser arm lever plate.
Distance between work
clamp and top of needle
plate
Adjust the work clamp lift
amount.
44
Clearance
between
thread wiper and needle
tip
Adjust the height of the
thread wiper.
47
The thread wiper is ob-
structing the needle.
Thread wiper position
Adjust the operating dis-
tance of the thread wiper.
47
Thread wiper does not
operate correctly.
Thread wiper position is
incorrect.
Thread wiper position
Adjust the operating dis-
tance of the thread wiper.
47
Lower thread winds to
one side.
Bobbin
winder
thread
tension stud height is
incorrect.
Bobbin
winder
thread
tension stud height
Adjust the height of the
thread tension stud.
30
Lower thread winding
amount is incorrect
Bobbin presser position is
incorrect.
Thread winding amount
Adjust the position of the
bobbin presser.
30
Stitches being skipped at
the sewing start.
Refer to “Skipped stitches
occur”
Refer to “Skipped stitches
occur”
64
Uneven
upper
thread
length.
Upper thread length
Adjust the sub-tension.
32
Thread
comes
un-
threaded.
Upper thread is too short.
Thread
take-up
lever
stroke
Adjust the thread take-up
lever stroke.
41