42 BA_VEB100-2-4-5_A5-3_230118_en.doc
6 Sewing problems and troubleshooting
C A U T I O N ! Danger of injury!
Switch off the machine and push down the Sewing drive switch
pedal to ensure that the machine is truly switched off.
Otherwise there is hazard of finger injuries and needle puncture!
Thread breakage
Possible reasons:
- Sharp edges or grooves in the needle guide, thread take-up lever, looper
or needle’s eye after the machine has been used for a long time.
- Looper or loop stroke incorrectly adjusted or has been moved, the thread
loops are not always caught.
- Thread tension is too high
- Thread thickness does not correspond to the needle thickness (thread too
thick)
Solutions:
- Replace or repolish the damaged parts
- Correct the looper setting and/or loop stroke
- Correct the thread tension, check the thread movement.
- Choose a suitable thread thickness
ALWAYS OBSERVE: Thread movement, thread, stitch plate with
corresponding plunger and cloth retainer, tested needles
and thread tension must correspond to the sewing
material being processed!
Imprecise blind stitching
Possible reasons:
- Often worn or damaged needle
- Cloth retainer or setting is incorrect
- Stitch plate or needle guide is incorrectly set
- Center needle guard damaged or worn
- Needle thickness is not suitable (to thin)
- Damaged or incorrectly adjusted plunger
Solutions:
- Replace any damaged needles, use the correct needle thickness
- Check the settings and correct if necessary
- Replace the center needle guard
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