Bernina Artista 730, Инструкция по эксплуатации

Страница: 259 / 285

255
Embroidery Support – Messages
Titel 1
Trouble Shooting
Prevention and Remedy of Failures
Note the following advice to recognize the causes of most of the operation failures in the
embroidery computer that might occur.
Check First Whether:
•
upper and lower threads are threaded correctly
•
the needle is inserted correctly - flat part of the
shank to the back
•
the needle is the correct size (see Needle/Thread
Chart on pages 17-19)
•
the embroidery computer is clean - remove any
thread lint
•
the hook race is clean
•
bits of thread are trapped between the tension
disks and under the bobbin case spring
Removing Trapped Thread
If the lower thread breaks and the thread is trap-
ped in the area of the take-up lever, proceed as fol-
lows:
•
power switch to «0» (off)
•
remove the screw on the head frame with the
angular Torx key
•
pull head frame to the left
•
remove remnants of thread
•
attach head frame and tighten screw
Upper Thread Breaks
Possible Faults:
•
upper thread tension is too tight
•
use of low quality needle. It is best to buy
needles in a BERNINA store
•
needle has been inserted incorrectly. The flat
part of the shank must be to the back
•
needle is blunt or bent
•
use of poor quality thread, thread with knots,
thread too old or dried out
Possible Solutions:
•
attach foam pad
•
use appropriate spool disc
•
use net for even unwinding of thread (pull over
upper thread spool)
•
stitch plate hole or hook tip is damaged: take
the embroidery computer to an authorized
BERNINA dealer
•
reduce embroidery speed
Lower Thread Breaks
•
lower thread tension is too tight
•
lower thread is trapped in the bobbin case:
•
Replace bobbin
•
needle is blunt or bent
•
the stitch plate hole has been damaged by the
needle:
•
It must be polished by a BERNINA Technician
Skipped Stitches
•
incorrect needle used
•
Use only 130/705H needle system
•
Needle is bent or blunt
•
Needle is not correctly inserted
•
Push all the way to the top when inserting
•
low quality, badly polished needle used
Needle Breaks
•
needle clamp screw is too loose
•
defective stitch plate
Unsatisfactory Stitch Formation
•
remnants of thread between tension disks:
•
pull folded thin fabric (use the fold, not an outer
edge) back and forth between the tension disks
to clean the left and right side of the thread
tension
•
remove any remnants of thread from under the
bobbin case spring
•
adjust thread tension
•
used wrong or no stabilizer at all
•
incorrectly threaded;
check upper and lower thread
•
when embroidering, thread pigtail tensioner with
lower thread
•
use appropriate spool disc
•
clean and oil hook (use original oiler only. See
Cleaning and Lubricating on page 185)
Embroidery Computer Fails to Run or Runs
Slowly
•
plug not fully inserted
•
power switch in «0» (off) position
•
embroidery computer requires normal room tem-
perature for operation
Defective Sewing Light
•
take the embroidery computer to an authorized
BERNINA dealer
Lower Thread Indicator Sensor
•
bobbin cover is not closed
•
not activated in the Setup Program
•
remove any thread lint and remnants
from the bobbin case
Upper Thread Indicator Sensor
•
not activated in the Setup Program
032131.70.04_0509_a730_EN