Bernina 900 electronic - CB Shuttle Adjustment; Thread Passage Adjustment; Lateral Setting of the Driver

Adjusting the CB shuttle
(CB
= central bobbin)
A straight needle must be used ior shuttle
adjustment
1. Thread passage
The thread passage
play between
shuttle It correction
is required, the bearing
busI
(53) and
shuttle drive (54) must be 0.3 of the shuttle
race must be axially shifted
mm Check with gauge No.39802202. It Unscrew screw (58) on the rear side of
the gap is too large
or too small. slightly the free arm and remove shuttle drive
adjust the short shank of the shuttle together with pinion.
drive inward or outward with adjusting
tool No, 398 020 03.
55
54
Fig, 32
Fig
33
2. Lateral setting of the driver
The shuttle drive must not protrude be-
yond the shuttle ace under ary circum
stances, On the other side, how ever, it
must lie no more than 0.1 mm behind
the upper edge of the shuttle race.
Fig 34
20