Strobel 3200D series, Operating Instructions Manual

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BA_3200D_A1_140203_en
5.4 Problems during sewing and troubleshooting
C A U T I O N ! Danger of injury!
Switch off the machine and ensure it is switched off by
pressing the pedal for switching the motor.
Otherwise there is a
danger of injury through crushing and
needle stitches.
•
Thread tearing
Possible causes:
- Sharp edges or grooves in the needle guide, thread sensor, hook or
needle eye after long use of the machine
- The thread between hook and reel capsule breaks or it is pinched
off.
- Too much oil has got into the hook path
- The reel runs to tight, or the reel walls are pushed apart by too tightly
wound thread
- The reel capsule venting or hook bridge are not adjusted correctly
- The hook to the needle or the loop lift has not been adjusted
correctly or it has slipped and therefore the thread loop is not always
taken up.
- The thread tension is too slack or too tight adjusted.
Remedy:
- Replacing or repolishing of the damaged parts.
- Dismount hook, remove reel capsule and polish inlet edges of the
reel capsule and the hook path.
- Sew out on a fabric rest with an absorbent thread (cotton thread,
wrapping cotton).
- Insert new reel
- Turn the machine through slowly manually and check whether the
loop slides over the hook unimpaired, if not, readjust reel capsule
venting or hook bridge.
- Correct hook position or loop stroke
- Correct thread tension, check thread run
Please observe: thread course, thread, needle plate with presser and
cloth retainer, needle and thread tension should always
be set and chosen according to the material to be
sewn.