Brother International BAS-416 Service Manual - Page 82

Adjusting, synchronizer, rotary, encoder, position, sensor

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5-7. Adjusting the synchronizer (the rotary encoder and the stop position sensor) The rotary encoder and the stop position sensor detect the needle stop position, and synchronize hoop motion. When the machine is emergency stopped during sewing or it stops after thread trimming, the needle bar is in the jump condition (stopped raised) and its thread take-up stops at the same position as the remaining eight ones (for BAS-4124 • 416A • BES-1210AC). 5-7 1. Adjusting the stop position signal (Use the Sync function in the test mode.) Sync T=0(6:•=:0:5=0 1. Turn on the power, and select the Sync (synchronize) function in the test mode (referring to page 62). T: timing pulse Stop position signal D: Synchronize signal 5: Stop position signal c N.H 1+1.MIN STOP POSITION = 100 92.5° [ Sync T = OD = OS 2. Turn the pulley in the rotation direction to set the stop mark on the belt cover to 92.5°. At this time, the stop signal circle should change from white to black. Loosen the two screws 0, and adjust the zero bight needle locating dog @ by moving it. Stop position signal When the pulley is turned 92.5° - 112.5°, a correctly adjusted stop position sensor should output the following: • Stop position signal (5) mark will change to black. •The buzzer will beep. 75 BAS-401 - 412A -416A- BES-1210AC

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5-7.
Adjusting
the
synchronizer
(the
rotary
encoder
and
the
stop
position
sensor)
The
rotary
encoder
and
the
stop
position
sensor
detect
the
needle
stop
position,
and
synchronize
hoop
motion.
When
the
machine
is
emergency
stopped
during
sewing
or
it
stops
after
thread
trimming,
the
needle
bar
is
in
the
jump
condition
(stopped
raised)
and
its
thread
take-up
stops
at
the
same
position
as
the
remaining
eight
ones
(for
BAS
-4124
•
416A
•
BES-1210AC).
5-7
1.
Adjusting
the
stop
position
signal
(Use
the
Sync
function
in
the
test
mode.)
Sync
T=0(6:•=:0:5=0
T:
timing
pulse
1.
Turn
on
the
power,
and
select
the
Sync
(synchronize)
function
in
the
test
mode
(referring
to
page
62).
Stop
position
signal
D:
Synchronize
signal
5:
Stop
position
signal
N.H
=
100
1+1.MIN
STOP
POSITION
92.5
°
c
[
Sync
T
=
OD
=
OS
2.
Turn
the
pulley
in
the
rotation
direction
to
set
the
stop
mark
on
the
belt
cover
to
92.5°.
At
this
time,
the
stop
signal
circle
should
change
from
white
to
black.
Loosen
the
two
screws
0,
and
adjust
the
zero
bight
needle
locating
dog
@
by
moving
it.
Stop
position
signal
When
the
pulley
is
turned
92.5°
-
112.5°,
a
correctly
adjusted
stop
position
sensor
should
output
the
following:
•
Stop
position
signal
(5)
mark
will
change
to
black.
•The
buzzer
will
beep.
75
BAS
-401
-
412A
-416A-
BES-1210AC