JUKI AK85B Manual de usuario

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.

– 2 –

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.) 󱢴.

– 3 –

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.

󱢵



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%

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