Bernina Artista 640 User Manual page 64

64 Buttonholes - Important Information
Buttonholes - Important Information
Marking Buttonholes
Manual Buttonholes
• mark the buttonhole length in the desired
position
• use Buttonhole foot No. 3C
Test Sewing
• always sew a test sample on the fabric
with stabilizer you intend to use
• select the buttonhole type you intend to
use
• sew the buttonhole in the same direction
on the fabric (with or against the grain)
• cut the buttonhole open
• push the button through
• adjust the buttonhole length if necessary
Thread Tension
• the tension is set automatically when a buttonhole is selected
• the upper tension is slightly looser than normal
• this gives a slightly rounded appearance to the beads, making the buttonhole
more attractive
• cord reinforces buttonholes and enhances their appearance
• sew both beads at the same speed
Automatic Buttonholes
• mark the length of just one buttonhole
• after sewing the first buttonhole, the
length for all subsequent buttonholes is
automatically programmed
• mark only the beginning of all subsequent
buttonholes
• use Automatic buttonhole foot No. 3A
If a buttonhole is to be sewn at right angles
to a seam, we recommend the use of the
height compensating plates for buttonholes
(available as optional accessory). Place the
plates from the back between fabric and
bottom of slide foot up to the thick part of
the fabric and push to front.
Keyhole Buttonholes
• mark the bead length only
• the correct length eye will be added when
the buttonhole is sewn
Corrections
To Adjust the Bead Width:
• alter the stitch width
Altering the Stitch Length:
• any alterations to the stitch length affect
both beads (more dense or less dense)
• always reprogram the buttonhole after
any changes to the stitch length
Using the compensation plate (in some
countries only available as optional
accessory) is recommended when sewing
buttonholes in difficult fabrics. It can only
be used with the Automatic buttonhole foot
No. 3A.