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Trouble shooting guide
Problem
The machine
• Looper or cloth plate cover is open.
does not sew:
• The main switch is not on.
• The machine is not plugged in.
Fabric does not
• Differential feed is wrongly adjusted.
feed evenly
• Presser foot pressure is too low.
Thread breaks
• The machine is not threaded correctly.
• Needles are incorrectly inserted.
• Wrong needles.
• Stitch setting is wrong.
Needles break
• Needles are bent or blunt, points are dam-
aged.
• Needles are not inserted correctly.
• Fabric was pulled while sewing.
• Stitch setting is wrong.
Skipped stitches • Needles are bent or blunt.
• Wrong needles used.
• Presser foot pressure is too low.
• Stitch setting is wrong.
Poor stitch for-
• Threads are not correctly between the thread
mation
guide No. 1.
• Thread has got caught.
• Machine is incorrectly threaded.
• Stitch setting is wrong.
Seams flute or
• Fabric was pulled while sewing.
wave, especially
• Presser foot pressure is too tight.
when sewing
• Differential feed is set incorrectly.
knits
Seams pucker
• Differential feed is set incorrectly.
Fabric edges
• Too much fabric is in the stitch.
curl
• Stitch selection lever is on roll hem.
Thread loops are
• Too little fabric in the stitch.
too loose
43
Cause
Solution
• Close the looper or the cloth plate cov-
er.
• Switch machine on. (Main switch to "I")
• Insert plug into main socket.
• Check the differential feed setting.
• Adjust the presser foot pressure.
• Check the threading.
• Insert needles fully into needle clamp
with flat side to the back.
• Use needle system 130/705H or JLx2.
• Check the stitch setting.
• Replace needles.
• Insert needles fully into needle clamp
with flat side to the back.
• Guide fabric gently with both hands.
• Check the stitch setting.
• Replace the needles.
• Use needle system 130/705H or JLx2.
• Increase presser foot pressure.
• Check the stitch setting.
• Check if thread is fitting between the
thread guide No. 1.
• Raise the presser foot and pull the
thread.
• Check threading path of each thread.
• Check threading path of each thread.
• Check the stitch setting.
• Guide fabric gently.
• Reduce presser foot pressure.
• Adjust differential feed to N - 2.
• Adjust differential feed to 0.7 - N.
• Reduce cutting width.
• Set selection lever to overlock.
• Increase the cutting width.
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