Needle/Hook Distance; Needle Position In Straight Stitch - Bernina aurora 430 Service Manual

Needle/Hook distance in direction of fabric feed
Standard:
Remove stitch plate cover. Insert needle (type
80 TCN). The lateral distance between needle
and hook (in the scarf) should be 0.01 mm to
0.05 mm.
Correction:
• Loosen screw 89 on pivot pin 90.
• Using a screwdriver, move needle bar
support 91 at the notch of the pivot pin
90 as appropriate.
• Retighten screw 89.
Warning! When scre 89 is loosened
the needle bar support will spring
backwards, potentionally bending the
needle.
Straight stitch needle position
Standard:
Basic settings of service program.
• Check pinning position 72a of stepping
motor. If necessary, adjust this first (see
page 30).
• Switch machine off.
• Pin stitch width stepping motor.
• The needle must be in the center of the
stitch plate.
Correction:
• Slightly loosen securing screw 71.
• Use eccentric key (001361.70.00) to
adjust needle bar support until the
prescribed needle position in the stitch
plate is reached.
• Retighten screw 71.
Checking the stitch width limiter
Select service programme test 3.5 (page 31)
needle position left and right. Needle must be
equally distributed in the limiter.
Correction:
Loosen screw 172 and move stop 171 in such
way that the needle does not hit the stitch
width limiter in either position. Retighten
screw 172.
89
90
0.01 - 0.05 mm
72a
71
72
172
71
91
171