Bernina KL. 940 Service Manual page 33

c) Zero position of stitch setting link
Needle: System 130/705 H Nm. 80. (neither
blunt nor bent). (Cl. 9 5 0 = 2 8 7 WH).
Sewing-off material raw cotton-cretonne,
2-ply, place under buttonhole foot (without
thread). Select a medium sewing speed.
Observe material- it must not move. If the
material is fed forwards, screw 1 5 7 must be
loosened and the advance lever 1 5 6 moved
upwards (in direction of handwheel).
A Material ist fed
backwards= correct
down wards
B Material ist fed forwards = correct upwards