Bernina Virtuosa 153 Instruction Manual & Sewing Manual page 56

Everything you need to know about buttonholes
A
1 2
1. Denser bead
2. Finer bead
B
1 2
1. Finer bead
2. Denser bead
Thread tension
· thread the bobbin thread through the finger of the
bobbin case
· the bobbin tension is a little tighter
· this gives the beads on the right side of the fabric
a slightly rounded appearance
· the buttonhole looks more attractive
· gimp reinforces buttonholes and enhances their
appearance (pages 26, 27)
Mark the length of manual
buttonholes
· mark the buttonhole
length in the appropriate
position
· stitched using Buttonhole
foot No. 3
Test sewing
· always test sew on the fabric and 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 and adjust the buttonhole
length if necessary
Corrections
To adjust the bead width:
· alter the stitch width
Altering the stitch length:
· any alterations to the stitch length affect both beads
(denser or less dense)
· always reprogram the buttonhole after any changes to
the stitch length
Balance for stitch counter buttonholes (pictures A + B)
· any alterations to the balance affect both beads
· if you alter the bead density with balance, delete the
programmed buttonhole with the clr/del button and
reprogramme the buttonhole with the new balance
setting
Balance for automatic/manual buttonholes
· any balance alterations to the 6-step manual and auto
length buttonholes affects both beads identically
because they are sewn in the same direction
Note:
When all buttonholes have been sewn, return balance to
the normal setting
Mark the length of
automatic buttonholes
· mark the length of just
one buttonhole
· after sewing the first
buttonhole, the length
for all subsequent button-
holes is automatically
programmed
· mark only the beginning
of all subsequent button-
holes
Buttonholes
Mark the length of keyhole
buttonholes
· mark the bead length
only
· the correct length eye
will be added when the
buttonhole is sewn
TIP
If a buttonhole is to be
sewn at right angles to a
seam, we recommend the
use of the buttonhole
leveler. Insert the plate
from behind between the
fabric and the foot up to
and over the thicker area.
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