JUKI AK85B User manual

i
ENGLISH
INSTRUCTION MANUAL
AK85B

– 1 –
❷❸
❶
❹❻
❺
INSTALLATION
Congratulations on your purchase of a JUKI's window-plate-mounting type Auto lifter.
The main features of this device are as follows: 1) Simple installation, 2) Usable in combination with the knee lifter.
Please read these instructions to assure long-term satisfactory usage.
1. Press the OFF button of the power switch to turn OFF
the power after conrming that the sewing machine
has stopped.
3. Remove the side plate.
Remove setscrew ❸. Remove wire clamping base
❶and oil shield ❷both of which are secured with
the same screw. (This oil shield ❷is not used to
install the AK device.) After you have removed oil
shield ❷, x wire clamping base ❶at its home posi-
tion by means of setscrew ❸.
(Caution)Theoatingamountofthetensiondisc
is changed by loosening wire clamping
base❶.AftertheassemblyoftheAK-85,
checktheoatingamountofthetension
discandadjustifnecessary.(Referto"12.
Adjustmentoftheoatingamountofthe
tensiondiscNo.2"p.4.)
4. Replace the hinge screw of the knee lifter horizontal
bar and the hinge screw of the knee lifter link with
horizontal bar pin ❹and hinge screw ❺supplied with
the unit. Install knee lifter link spring ❻as illustrated
in the gure.
2. Check to make sure that the power switch is in the OFF
state. Then, unplug the power cord.Perform the work
of step 3. after conrming that the power has been cut
and it has passed for 5 minutes or more.
1
4
2
0
3

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❹
❼󱢳
❼
❽
❾
Noclearanceisprovided
betweenframeandsponge
Noclearanceis
providedinthe
notch
Tensionreleasewire
Kneelifterhorizontalbar
󱢴
5. Make sure that a sponge is placed as illustrated in
the gure. If not, pass the tension release wire in
the upper notch and pass the knee lifter horizontal
bar in the lower notch so that no clearance is pro-
vided in the notches. In addition, make sure that
there is no clearance between the frame and the
sponge.
* Improperly-installedspongecanbeacauseofoil
leakagefromthebobbinwinder.
7. Install side plate (asm.) ❼on the sewing machine.
At this time, install side plate (asm.) so that the slot
in solenoid link 󱢳 ts over knee lifter horizontal bar
pin ❹.
6. Remove washer ❼and nut ❾from side plate
(asm.) ❽of the device.
8. Install solenoid (asm.) 󱢴.

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AB
10. Pass the solenoid cord inside solenoid shaft 󱢵.
11. Connect the solenoid connector to connector Cfor
the AK solenoid on the back surface of the control
box.
9. Lower the presser foot until it comes in close
contact with the throat plate. Turn solenoid shaft
counterclockwise with a screwdriver Awith the
solenoid pressed in the direction of the arrow, then
tighten the connecting stud clamping screw with
hexagonal wrench key B.
(Caution)Theadequatetighteningtorqueis3.4to
5.9N·m.Beaware,iftheconnectingstud
clampingscrewisexcessivelytightened,
thesolenoidarmcanbreak.
󱢵


C
Connectorconnectiondiagram
Pedal
ACpower
supply
Machinehead
connector

– 4 –
󱢶
󱢷
󱢸
󱢹
12. Adjustment of the oating amount of the tension disc
No. 2
A. Howtochecktheoatingamountofthetension
discNo.2
Check whether the tension disc No. 2 󱢷 oats 0.5
to 1 mm when thread take-up picker 󱢶is pressed to
the right with the thread take-up lever located slightly
below its highest position and the presser foot lifted.
B. Howtoadjusttheoatingamountofthetension
discNo.2
1. To increase the oating amount, loosen screw 󱢸,
and move tension release wire 󱢹to the right.
2. To decrease the oating amount, loosen screw 󱢸,
and move tension release wire 󱢹to the left. After
adjustment, securely tighten screw 󱢸.
(Caution) 1. To performre-turningON of thepower,be suretoperform after thetimeof onesecondor
morehaspassed.(IfON/OFFoperationofthepowerisperformedquickly,settingmaybe
notchangedoverwell.)
 2. Auto-lifterisnotactuatedunlessthisfunctionisproperlyselected.
 3. When “FL ON” is selected without installing the auto-lifter device, starting is momentarily
delayedatthestartofsewing.Inaddition,besuretoselect“FLOFF”whentheauto-lifteris
notinstalledsincethetouch-backswitchmaynotwork.
SPECIFICATIONS
○Presser foot lifting amount : Standard 9mm.
○ Max. presser foot pressure : 88N.
* Line voltage : At 100%