Strobel 310D-R - Page 36

32 BA_310D-R_3100D-R_A16-3_180117_en
• Uneven stitching
Possible causes:
- frequently worn or damaged needles
- height of needle plate or needle slide plate incorrectly adjusted
- unsuitable needle thickness (too thin)
Remedy:
- Replace damaged needle. Check adjustments and correct if
necessary. Use correct needle thickness.
• Missing loops
Possible causes:
- incorrectly adjusted or badly adjusted shuttle
- loop lift too small
Remedy:
- Turn machine by hand and check shuttle motion. The cause can
usually be seen.
- If necessary, also correct thread tension or thread tension spring.
- correct loop lift.
• Loops become stuck
Possible causes:
- thread tension too slack
- needle not tacking
Remedy:
- Check thread tension or thread tension spring
- Check stitch depth (even for skip stitch or plunger lowering)
• Machine does not start
Possible causes:
- Control fault
- Mechanical damage
Remedy:
- Switch machine off and on again
- Rectify mechanical faults
- Check programming. If necessary, call customer service.