Bernina 900 electronic Service Manual page 19

At full machine speed, the material must
not move. If it does, correct as follows:
l
-
Loosen setting ring (133) (2 screws)
which is mounted on adjusting shaft (131)
and rests against the ebackward" stitch
setting cam (132) and also loosen the
.backward,
stitch setting cam (132) with
the aid of Allen wrench (134). Then, loo-
sen the forward" stitch setting cam (135)
which is also mounted on adjusting shalt
(131) with the Allen wrench (screws make
contact with the surface of the adjusting
shaft).
Set the neutral position by moving the
cam axially. If material feed no longer
occurs, retighten the .forward. stitch set-
ting cam.
Now, slide the ."backward". stitch setting
cam (132) up to the limit stop and tighten.
Mounting screw (136) should rest on the
same plane as the dforward. stitch setting
cam. Finally, slide the setting ring to the
cam and tighten.
Fig 27
134
135
I
22
133
132
136
I
V
0i
]134
Fig. 28
17