JUKI BK-7 Instruction Manual
BK-7
INSTRUCTION MANUAL
CONTENTS
Component parts list ......................................................................................................1
1. Installing the main body of automatic bobbin changer ...........................................2
1-1. Attaching the plate cover ...............................................................................................2
1-2. Installing the main body of automatic bobbin changer .............................................. 4
2. Wiring procedure ........................................................................................................5
(1) Wiring to the main body of BK-7 ...............................................................................5
(2) Wiring to the PS-700 ..................................................................................................5
3. Adjusting the installation ...........................................................................................8
3-1. Adjusting the installation of the automatic bobbin changer ......................................8
4. Explanation of operation of the control box of automatic bobbin changer ........15
5. Parts list for the BK-7 ...............................................................................................21
i
Component parts list
Check the below-stated parts.
Automatic bobbin changer asm., complete set
Setscrew, screw M6 × 20 L, 4 pieces
Cable clip band T-18R, 7 piecesAir hose ø8 × 800 mm
Cable clip SL-9N, 3 pieces
Control box, complete set
Setscrew, screw M5 × 20L, nut M5,
2 pieces each
Opening / closing door set, plate cover
Support plate
Setscrew, screw M4 × 16L, nut M4,
4 pieces each
– 1 –
1. Installing the main body of automatic bobbin changer
WARNING :
1. Installation procedure of the automatic bobbin changer must be carried out by a trained technical
expert.
2. Request your distributor or a specialized electrician to carry out electric wiring.
3. Do not connect the power plug of the sewing machine before completing the installation
procedure.
If the start button is pressed during the work by mistake, the sewing machine will actuate, posing a
great risk.
4. Be sure to connect the ground wire.
If the ground wire connection is not proper, electric shock can be caused.
1-1. Attaching the plate cover
1) Pull out two air hoses ❾ from the
❶
❸
❾
manual valve.
Remove screws ❶ (four pieces)
and ❷ (two pieces) and nuts ❸
(two pieces). Detach the opening /
closing table cover asm.
Throat plate
❻
❼
❷
Opening /
closing table
Cover asm.
❺
❹
2) Attach support plates ❹ and ❺ with a table. Se-
cure them with screws ❻ (four pieces) and nuts
(four pieces).
❼
Support plates ❹ and ❺ are provided
with a magnet sheet on their top
surfaces. Attach the support plates with
their magnet-attached sides up and with
their sides with shorter base metal faced
toward the throat plate.
– 2 –
Throat plate
❽
A
3) Fit plate cover ❽ on the table.
Place it in such a way that hole portion A of the
opening / closing cover is brought to opposite side
of the throat plate.
1. Check to make sure that plate cover
does not project the table surface.
❽
If it projects the table surface, correct
by slightly bending part ❹ or ❺.
2. Afterttingplatecover❽ on the
table, carefully adjust the longitudinal
position of the cover so that it does
not come in contact with the throat
plate of sewing machine.
[How to open the plate cover]
Inserting a thin screw driver into hole portion A of
the opening / closing cover, open plate cover ❽.
– 3 –
1-2. Installing the main body of automatic bobbin changer
1) Put screws ❶ (four pieces) into the top surface of
table. Fitting bobbin changer mounting plate ❷ on
❶
Location
of screws
which are to
be left in the
current state
❶
❷
❸
those screws, temporarily tighten the screws.
2) Adjust the nal position of the bobbin changer
following the steps of procedure for adjusting the
mounting position of bobbin changer. Then, tight-
en screws ❶ (four pieces) and screw plate ❸.
Location of screws
which are to be left in
the current state
❹
❺
❻
3) Put screws ❹ (two pieces) into the tapped holes
from the top surface of table. Hanging control box
of the bobbin changer on the screws, tighten
❺
nuts ❻ (two pieces).
Attach the control box in such a way that
its operation button faces to the operator
side.
– 4 –
2. Wiring procedure
(1) Wiring to the main body of BK-7
②
(2) Wiring to the PS-700
②
①
③
Connect the two wirings coming from the main
①
body of BK-7 and two wirings coming from the
controller while matching their connector num-
bers.
Secure the wirings at two locations with cable
②
clip bands as illustrated in the gure. At this
time, take care not to x the cores.
Connect the cords to the connectors in the
③
order or white one, red one and blue one from
the left as illustrated in the gure.
①
Secure the wirings at two locations as illustrat-
①
ed in the gure. At this time, take care not to
x the cores.
Detach the side cover.
②
Remove cable clamps which secure the Y-ori-
③
gin sensor wirings at three locations. They are
to be changed with the cable clamps supplied
with the unit in the below-stated Step ⑤.
③
③
③
– 5 –
⑤
④
For wiring of cables, pass the two cables
④
coming from the controller along the outside of
strut (this is the wiring route).
Secure the Y origin sensor wirings together
⑤
with the aforementioned two cables and air
tube using the cable clamp supplied with the
unit.
At this time, take care not to bend the wirings
located at the root of Y origin sensor.
Secure the aforementioned three cables, air
⑥
tube and Y origin sensor wirings with cable
clamps supplied with the unit at two locations
as illustrated in the gure.
⑥
⑥
⑦
⑧
Open the storage door on the rear side of the
⑦
main body of PS-700. Draw the cables, wirings
and air tube through the hole into the sewing
machine table.
Pass two wirings through the cable clamps
⑧
which have already been attached to secure
them.
Connect the wirings to the connectors at four
⑨
locations on the PCB.
CZ1324
CZ1316
CZ1320
CZ1327
– 6 –
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