JUKI AK85C Manuale utente

AK85C

INSTRUCTION MANUAL

– 1 –

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.

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.

3. Remove the side plate.

Replace the hinge screw of the knee lifter horizontal

bar and the hinge screw of the knee lifter link with

horizontal bar pin ❶and hinge screw ❷supplied with

the unit. Install knee lifter link spring ❸as illustrated

in the gure.

No clearance is provided

between frame and sponge

No clearance is

provided in the

notch

Tension release wire

Knee lifter horizontal bar

4. 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.

❶❸

❷

– 2 –

6. Install side plate (asm.) ❹on the sewing machine.

At this time, install side plate (asm.) so that the slot

in solenoid link ❼ ts over knee lifter horizontal bar

pin ❶.

5. Remove washer ❺ and nut ❻ from side plate

(asm.) ❹of the device.

7. Install solenoid (asm.) ❽with washer ❺and nut ❻.

8. 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.

❶

❹❼

❹

❺

❻

❽

❺

❻

– 3 –

9. Pass the solenoid cord inside solenoid shaft ❾.

10. Connect the solenoid connector to connector Cfor

the AK solenoid on the back surface of the control

box.

❾

ペペペ

For upgrading

Connector

connection diagram

Auto-lifter

Solenoid &

LED/TB unit

Pedal

– 4 –

SPECIFICATIONS

○Presser foot lifting amount : Standard 9mm.

○Max. presser foot pressure : 88N.

* Line voltage : At 100%

11.

Adjustment of the oating amount of the tension disc No. 2.

A. How to check the oating amount of the tension disc

No. 2

1. Turn the main shaft until the bottom end face of needle

eyelet is almost aligned with the top surface of throat plate.

2. Press thread trimmer solenoid plunger 󱢳to the left.

3. Check to make sure that the roller does not come in con-

tact with the thread trimmer cam.

4. Check to make sure that the oating amount of the tension

disc No. 2 󱢴is in the range of 0.5 mm to 1 mm.

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.

󱢴

Almost aligned 󱢵

󱢶

󱢳

Thread trimmer cam

Roller

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