Timing Adjustment Of Needle And Rotary Hook - Brother BAS-6150 Instruction Manual

Chapter 5 Adjustment

1. Timing adjustment of needle and rotary hook

q
2.4mm(Standard)
Change of the lift amount of needle bar
The lift amount of needle bar is required to change when sewing materials that are uneasy to make a
needle hole loop are used.
58
Needle
1-1.5mm
1490S
Gauge
2.4 2.8 3.5 2.4 2.8 3.5
r
Gauge
2.4 2.8 3.5 2.4 2.8 3.5
w
Lift amount of needle bar
Loosen screw w and rotate rotary hook q so
that rotary hook blade top q is in alignment
with the center of the needle when the needle
goes up by 2.4 mm (standard) (to be measured
by a gauge) from the lowest position.
Height of the needle bar
Loosen set screw e and let the needle up and
down so that the clearance between top edge
of rotary hook and that of needle hole be 1 ~
1588S
1.5mm.
1. Rotate the pulley to move the needle to the
lowest position.
2. Align the bottom face of needle clamp r
with the gauge.
If aligned to the larger number, the less occurs the stitch skip.
(standard: 2.4 mm) Excessive increase of lift amount causes
the loose tension of the thread and the frequent stitch skip.
3. Adjust the timing between the needle and
rotary hook written above.
1589S
BAS-6150
e
1491S 1492S