Bernina Artista 730, Инструкция по эксплуатации

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186
Sewing and Sewing Computer Support – Trouble Shooting
Trouble Shooting
Check whether:
•
the upper and lower threads are threaded
correctly
•
the needle is inserted as far up as possible with
the flat side of the shank to the back
•
the needle size is correct – check the needle/
thread chart on page 18
•
the sewing computer is clean – brush out any
thread lint
•
the hook race is clean
•
any threads are trapped between the tension
discs or under the bobbin case spring
Upper Thread Breaks
Possible Faults:
•
upper thread tension is too tight
•
needle is of inferior quality; purchase needles at
your authorized BERNINA dealer
•
needle has been inserted incorrectly – the flat
side of the shank must be to the back
•
needle is bent or blunt
•
poor quality, knotted, old or dried out thread
has been used
Possible Solutions:
•
use the correct spool disc
•
stitch plate hole or hook tip damaged – take
your sewing computer to your BERNINA dealer
Lower Thread Breaks
•
the lower thread tension is too tight
•
the bobbin is jammed in the bobbin case:
•
Remove and replace the bobbin
•
the hole in the stitch plate has been damaged
by the needle:
•
this must be polished by an authorized
BERNINA service technician
•
the needle is blunt or bent
Calibration of the Display
To open the calibration screen directly, proceed as
follows:
•
press both needle position buttons on the body
simultaneously and keep them pressed
•
turn on the sewing and embroidery computer
•
as soon as the calibration screen is opened,
release the two buttons
•
Calibration of the Display see page 169
Skipped Stitches
•
wrong needles used:
•
use only 130/705H system
•
Needle is blunt, bent or incorrectly inserted:
•
Push right to the top when inserting
•
needle is of inferior quality or badly polished
•
the needle point does not suit the fabric being
sewn; if necessary, use a ball point for knitted
fabrics and a cutting point for hard leather
•
for narrower stitches use a stitch plate with
smaller stitch plate hole (5.5mm, optional
accessory)
Needle Breaks
•
needle clamp screw loose
•
fabric pulled to the front instead of behind the
presser foot
•
when sewing over thick area, the fabric was
pushed with the needle still in the fabric; use
Jeans foot No. 18
•
for more information regarding Needle see
page 19
Faulty Stitching
•
remnants of thread between the tension discs:
•
pull folded, thin fabric (do not use fabric edge)
between the tension discs and clean them by
moving the fabric forwards and backwards on
the left and right side of the thread tension
•
remove remnants of thread under the bobbin
case spring
•
incorrect threading. Check upper and lower
threads
•
use the correct spool disc
•
clean and lubricate hook (use only original oiler;
see Cleaning and Lubricating page 185)
Cannot Sew Thick Fabric
•
needle/thread combination is not correct (the
thread is too thick for the inserted needle)
•
use height compensating tool, when sewing
over a thick seam
Sewing Computer Fails to Run or Runs Slowly
•
plug not fully inserted
•
turn power switch off («0»)
•
sewing computer has been standing in a cold
room
•
restart sewing computer
Sewing Computer Sews in Reverse
•
Continuous Reverse Sewing function is activated
Prevention and Remedy of Failures
In most cases you will be able to identify and remedy faults by checking the following.
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