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Trouble shooting
Problem Cause Solution Page
The machine
does not sew
The main switch is not on.
The machine is not plugged in.
Switch machine on. (power switch to “I”).
Insert plug in main socket.
8
7
Fabric does not
feed evenly
Differential feed is adjusted incorrectly.
Presser foot pressure is too low.
Lower or upper knife is too blunt or
wrongly positioned.
Check the differential feed setting.
Adjust the presser foot pressure.
Replace the upper or lower knife.
21
24
26
Thread breaks Thread tension is too tight for the thread
being used.
The machine is not threaded correctly.
Needles are inserted incorrectly.
Wrong needles used.
Reduce thread tension.
Check the threading.
Insert needles fully into needle clamp, with
the at side to the back.
Use the needle system 130/705H.
19
13-17
11
11
Needles break Needles are bent or blunt, points are
damaged.
Needles are not inserted correctly.
Fabric was pulled while sewing.
Replace needles.
Insert needles fully into needle clamp, with
the at side to the back.
Guide fabric gently with both hands.
11
11
--
Skipped stitches Needles are bent or blunt.
Wrong needles used.
Presser foot pressure is too low.
Replace the needles.
Use needle system 130/705H.
Increase presser foot pressure.
11
11
24
Poor stitch for-
mation
Threads are not correctly between the
tension discs.
Thread has got caught.
Machine is threaded incorrectly.
Check if thread is lying between tension
discs.
Raise the presser foot and pull the thread.
Check threading path of each thread.
Check threading path of each thread.
12
9
13-17
13-17
Seams ute or
wave, especially
when sewing
knits
Fabric was pulled while sewing.
Presser foot pressure is too high.
Differential feed is set incorrectly.
Guide fabric gently.
Reduce presser foot pressure.
Adjust differential feed to N-2.
--
24
21
Seams pucker Needle thread tension is too high.
Differential feed is set incorrectly.
Reduce the needle thread tension.
Adjust differential feed to 0.7-N.
19
21
Fabric edges curl Too much fabric is in the stitch.
Thread tension is too high.
Stitch selection lever is on roll hem.
Reduce cutting width.
Reduce thread tension.
Set selection lever to overlock.
20
19
23
Thread loops are
too
Too little fabric in the stitch. Increase the cutting width. 20
27
28


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