JUKI LU-2810 Series - Page 78

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WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
Trouble Cause Checking Corrective measures
2. Thread slips off the
needle eyelet.
2-1) Needle thread slips off the needle eye-
let immediately after thread trimming.
1-A) Check whether the needle thread re-
maining at the needle top after thread
trimming is short.
Refer to the cause of previous section “Needle thread
remaining at the needle top after thread trimming is
short”.
2-2) Needle thread slips off the needle eye-
let at the start of sewing.
2-A) Check whether the needle thread re-
maining at the needle top at the start of
sewing is short.
2-B) Hard-to-slip thread is used. Decrease the number of times of threading needle
thread.
3. Defective thread trim-
ming
3-1) Thread cannot be trimmed. 1-A) The blades of moving knife and counter
knife have been improperly adjusted.
Refer to “2.-(17)-4) Adjusting the knife pressure” and
“2.-(17)-1), 2) and 3) Position of the moving knife and
Position of the counter knife”.
1-B) The blades of moving knife and counter
knife have worn out or broken.
Replace the moving knife and counter knife with new
ones.
1-C) Pressure of the counter knife is insuf-
cient.
Refer to “2.-(17)-4) Adjusting the knife pressure”.
1-D) Presser foot drops from cloth at the time
of thread trimming.
Perform thread trimming on cloth.
3-2) Thread remains uncut after thread trim-
ming.
2-A) The blades of moving knife and counter
knife have been improperly adjusted.
Refer to “2.-(17)-4) Adjusting the knife pressure” and
“2.-(17)-1), 2) and 3) Position of the moving knife and
Position of the counter knife”.
2-B) The blades of moving knife and counter
knife have worn out or broken.
Replace the moving knife and counter knife with new
ones.
2-C) Thread trimmer timing is excessively
retarded.
Refer to “2.-(17)-6) Thread trimmer cam timing”.
2-D) Pressure of the counter knife is insuf-
cient.
Refer to “2.-(17)-4) Adjusting the knife pressure”.
2-E) Presser foot drops from cloth at the time
of thread trimming.
Perform thread trimming on cloth.
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海外講習会用121122LU-2810(-7)EM