72
Trouble shooting guide
Problem:
Cause:
Solution:
The machine does not sew.
The presser foot is up or the
Lower the presser foot. Close the looper cover.
looper cover is open, the
safety control lamp is on.
The main switch is not on.
Switch machine on. Main switch to I.
The machine is not plugged in. Plug machine into main socket.
Fabric does not feed evenly:
Differential feed is wrongly
Check the differential feed setting.
adjusted.
Presser foot pressure is
Adjust the presser foot pressure.
too low.
Lower or upper knife is blunt
Replace the lower or upper knife.
or wrongly positioned.
Thread breaks:
Thread tension is too tight for
Reduce thread tension.
the thread being used.
Needles not inserted correctly.
Insert needles fully into needle clamp with flat side to
the back.
Wrong needles.
Use system 130/705 H needles for overlock or cover stitch,
or JLx2 for cover stitch.
Needles break:
Needles are bent, blunt or
Replace the needles.
points are damaged.
Needles are not inserted
Insert needles fully into needle clamp with flat side to
correctly.
the back.
Fabric was pulled while
Guide fabric slightly with both hands.
sewing.
Skipped stitches:
Needles are bent or blunt.
Replace the needles.
Wrong needles used.
Use system 130/705 H needles for overlock and cover-/chain
stitch or JLx2 for cover stitch.
Presser foot pressure is
Increase foot pressure.
too low.
Poor stitch formation:
Sewing position incorrect.
Turn the stitch selection dial to the correct position.
Threads are not between the
Check if thread is lying between the tension discs.
tension discs.
Thread has got caught.
Raise the presser foot, pull the threads and lower the
presser foot.
Machine is incorrectly
Check threading path of each thread.
threaded.
Seams flute or wave,
Presser foot pressure is
Reduce presser foot pressure.
particularly when sewing
too high.
knits.
Differential feed is set
Adjust differential feed between N and 2.
incorrectly.
Fabric was pulled while
Guide fabric slightly.
sewing.
2500_DCE_2_englisch_neu 09.10.2007 15:02 Uhr Seite 72
