Bernina 1230 - Test P1; Automatic Buttonholer Adjustment

What is to be
tested What
to adjust
Normal condition
- Automatic
buttonholer
a) Testing and adjustment
I 'H
- PrintS-1230
- Initial state of service operation
(page 17).
- Print Ret-1130
- Select service-programme
5.
- Bo-
Press button for buttonholing.
- Mount buttonhole foot.
- Lower feed-dog.
- Lower presser-foot lifter lever.
- Clip the
adjusting filter on the presser
foot
bar from the
right hand side.
Slide it to its highest position until it
V
audibly clicks into place.
With
a small screwdriver
rotate
potentiometer
vauto
A ) on print
S 1230 clockwise
to its endstop (LED
A
does
not
illuminate).
Slowly
rotate
the potentiometer
in the opposite
a
direction,
simultaneously
sliding
the
acarriage
of
the
buttonhole
foot
until
LED
A
just
starts
to
flash.
no.
000.354.70.01
Potentiometer ((auto
B can now be
adjusted in a similar fashion using
LED B.
Note:
In
order to allow
the foot carriage
to be moved
easily, two
smooth pieces
of material should
beplaced
between the
needle plate
and the foot
cariage. (Alternatively
use knee lever
or lifter lever
to weaken
the
pressure
of the material presser bar.)
U,