Strobel VEB100-1 - Page 43

39 BA_VEB100-1-2-2W-4-5_A3-1_180615_en
 Skip a loop
Possible causes:
- Incorrectly adjusted looper
- Loop stroke/needle stroke incorrectly adjusted, therefore loop size
(too small/too large) may not be suitable
- Chaining finger damaged or altered
- Incorrectly set or altered cloth retainer or cloth retainer pressure
Solutions:
- Rotate the machine by hand, check the looper movement; usually the
cause can be seen.
- Check the settings, correct if necessary and/or replace any damaged
parts.
- If necessary, change the threading at take-up
 The machine does not start even though the indicator lamp of the
main switch is on.
Possible causes:
- Thread trimmer not in final position, microswitch is locked
- Control box error
- Mechanical damage, machine is blocked
Solutions:
- Turn the machine off and back on again. Check the cutting position
of the blade. Check the programming
- Eliminate any mechanical faults and, if necessary, call the customer
service.
 Markings or damage to the sewing material
Possible causes:
- Feed dog gearing is not suitable
- Plunger shape is not suitable for the sewing material
- Cloth retainer, pressure is set too strongly
- Presser foot pressure has been incorrectly adjusted or lift-off is
blocked.
- Damaged sewing parts (lower side of needle plate!)
- Needles or thread thickness not suitable
Solutions:
- Replace the feed dog or plunger
- Check the presser foot, sewing parts and their functionality, replace
any damaged parts and/or repolish them if necessary.
- Choose needles and threads that are suitable for the sewing material