Bernina 900 electronic - Return Motion Adjustment; Adjusting the Return Motion

slide tool
No. 3904904
from
the rear
of
The bearing
bush
can be
mowed
to the
the
free arm
through
the shuttle
race
bore rear
by rotating
the
handle
clockwise.
and
place on
pin (59),
Rotate
the thrust
If a forward
correction
must be
made, the
nut of
the tool
against
the hub
of the
tool
must be
inserted
from the
hinged
shuttle
race until
it makes
contact,
cover side
(i. e
from the
front),
59
56
Fig . I
m980
90
3. Adjusting the return motion
Correction due to
inaccurate adjust-
men
For adjustment,
use
a flawless
needle,
system
705 B.
No. 80. Set needle
deflec-
p
61
6os4
tion
to
left-hand
stitch
(set
zig-zag
to
* Set rack in forward
dead center and
loosen screw
(60) from rack
follower
a
i T
, -
_
Axial displacement
of
rack (61) to
the
left longer
return
motion:
to the
right
shorter return motion.
The distance
is correctly set when the
distance
between
the shuttle
tip
and left
hand needle
edge
is 2.8-3
mm.
Tighten
rack
follower and
check
driver
for
smooth
operation.
Unscrew lHat head screw (58) on the
driver shaft and slide driver
shaft back-
wards and
forewards
in the bushing
Fig 36
21
A4