JUKI AK-154 Bedienungsanleitung

INSTRUCTION MANUAL

AK-154

CONTENTS

1. FEATURES.............................................................................................. 1

2. INSTALLATION ....................................................................................... 2

3. HOW TO SELECT THE FUNCTION OF AUTO-LIFTER ....................... 5

4. OTHERS (Advanced edition) ................................................................ 6

4-1.

Function for reducing the presser foot pressure at the beginning of sewing

....6

4-2. Presser foot lifting height setting function in the case the sewing machine

stops with its needle-bar up.................................................................................7

4-3. Presser operating speed changing function ......................................................7

This is the auto-lifter incorporating the cam which is driven by the stepping motor.

①After the presser foot is lifted by the auto-lifter, it is retained at its upper position by the cam. As a

result, the power consumption is reduced.

②Since this auto-lifter does not produce solenoid-like impact noise, the comfortable work environment

is maintained.

③Function for reducing the presser foot pressure at the beginning of sewing

If the needle thread is not properly drawn down under the material fabric while the thread presser

(NB device) is used, the assist function for reducing the presser foot pressure at the beginning of

sewing to help the needle thread to be smoothly drawn under the material fabric can be enabled.

* The AK device operates with the factory-set value by turning it ON.

④Presser-foot lifting height setting function

The lifting height of the presser foot can be set in two different stages. When the back part of pedal

is depressed during sewing, the thread trimmer trims thread, then the presser foot automatically

goes up to its 1st lifting height.

When the back part of pedal is strongly depressed while the sewing machine is at rest or after the

completion of thread trimming, the presser foot goes up to its 2nd lifting height.

Factory-set amount of lift of the

presser foot at the time of shipment

Features

1st lifting height of presser foot 5.0 mm 0.1 to 8.5 mm

2nd lifting height of presser foot 8.5 mm 8.5 to 13.5 mm

1. FEATURES

⑤Presser operating speed changing function

For reducing the operating noise or further reducing the material damage by the presser foot when

it is lowered to contact the material, the presser operating speed can be changed appropriately.

– 1 –

WARNING :

Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the

sewing machine.

2. INSTALLATION

(1) Loosen setscrew ❷of side plate ❶. Remove side plate ❶.

* Side plate ❶and setscrew ❷removed as described above are not used again since they are replaced

with the parts to be retrotted to the sewing machine.

(2) Remove knee-lifter bar hinge screw ❸.

(3) Loosen presser-lever fulcrum shaft setscrew

❹from above the top of the arm. Remove

presser-lever fulcrum shaft ❺.

❶

❷

❹

❸

1. Apply the grease supplied with the

unit to each joining section.

2. Press AK lever asm. ❻against the

sewing machine frame. Then, move

the former so that it is spaced 0.1

mm from the latter. In this state,

fasten presser lever fulcrum shaft

setscrew ❹to secure presser lever

fulcrum shaft ❺.

Check to make sure that AK lever

asm. ❻moves smoothly.

Check to make sure that the slit in

presser lever fulcrum shaft ❺is

positioned horizontally.

(5) Attach knee-lifter connecting rod ❼to the AK

lever. Fix cable clip band ❽in the hole through

which knee-lifter connecting rod ❼of AK lever

is to be passed through. Then, insert knee-lifter

connecting rod ❼into the cable clip band.

(4) Install AK lever asm. ❻which is provided with

a roller instead of the removed parts.

* For the AK device which is purchased in the shipped state, it has already been factory-adjusted.

The AK device can be put into use after connecting its connector (CN37) to the destination of connection

in the control box. (Refer to "2. Installation procedure (10) to (11)").

❻

❺

❻

❺

❻

❼

❽

Provided

with a roller

0.1mm

Fig. A

– 2 –

(6) There is a marker line on the surface of cam 󱢶.

Adjust so that marker line Aon the cam and end face B of motor xing plate ❾are collinear to each other.

* Do not disassemble the cam 󱢶and the motor since their origin positions have been facto-

ry-adjusted appropriately at the time of delivery.

(7) Temporarily x presser motor asm. 󱢴with three presser motor asm. setscrews 󱢳.

At this time, adjust motor asm. 󱢴up and down to bring presser motor asm. 󱢴to such a position that it

does not push up the cam roller 󱢵. (The presser foot sole fails to come in contact with the throat plate.)

Securely tighten three presser motor asm. setscrews 󱢳while bringing cam roller 󱢵and cam 󱢶into light

contact with each other. (Check to make sure that the presser foot sole does not oat above the feed dog.)

Adjust presser motor asm. 󱢴so that cables and wires located inside the sewing machine

are positioned above the xing plate ❾.If the cables and wires are positioned under the

xing plate ❾, they will interfere with the cam 󱢶.

󱢶

❾

󱢳

󱢴

󱢶

❻

If the cam roller 󱢵is

raised, the problem

that the presser foot

sole fails to come in

contact with the throat

plate can occur.

Collinear

󱢵

Light-contact state

󱢶❾

(8) Remove handwheel 󱢺and pulley cover 󱢷.

Connect motor terminal (blue) 󱢸to the INT

PCB connecter under the main motor.

(9) Route the motor cable along the main motor

cable. Secure them with cable clip band 󱢹

supplied with the unit.

󱢸

󱢹

󱢺

󱢷

– 3 –

(10)

Remove four xing screws from the four corners of the control box cover. Remove control box cover 󱢻.

(11) Connect the motor cable connector to the connector (CN37).

Check to make sure that the connectors are securely connected. Then, attach control box cover 󱢻.

󱢻

CN37

(12) Fix cover 󱢽 supplied with the unit with ve

screws 󱢼(shank length 12 mm)

Collinear

Make sure that the marker line Aon

the cam with end face Bis aligned

with motor fixing plate ❾before

closing cover 󱢽.

❾

󱢽󱢼

󱢼

– 4 –

3. HOW TO SELECT THE FUNCTION OF AUTO-LIFTER

When installing the auto-lifter device (AK),

the function of auto-lifter is actuated.

(1) Turn ON the power switch while

keeping ❶held pressed.

1. To perform re-turning ON of

the power, be sure to per-

form 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 prop-

erly selected.

In the case the auto-lifter is

not attached, [ K023 ] must be

set to [ 0 ] without exceptions.

(2) Set the set number to [1] with

❷. Press ❸. Then, the pow-

er-OFF screen is displayed. Turn the

power OFF.

❶

❷

❸

– 5 –

4. OTHERS (Advanced edition)

4-1. Function for reducing the presser foot pressure at the beginning of sewing

If the needle thread is not properly drawn down under the material fabric while the thread presser (NB

device) is used, the assist function for reducing the presser foot pressure at the beginning of sewing

to help the needle thread to be smoothly drawn under the material fabric can be enabled.

(3) Move the cursor to [ U290 Thread

presser AK operating time ]. Input the

lifting time using with ❷.

Factory-set value : 20

Adjustable range : 0 to 50

The longer the lifting time is increased,

the higher the presser foot sole is

brought up above the throat plate.

❶

❷

The amount of uplift of the presser foot above the throat plate varies according to the

material thickness of the item to be sewn and the presser foot pressure. Be sure to

check the actual condition before starting sewing.

When installing the auto-lifter device (AK),

the function of auto-lifter is actuated.

(1) Turn ON the power switch.

(2) Press ❶.

– 6 –

It is possible to set the lifting height of

presser foot, when the sewing machine

stops with its needle-bar up, in two differ-

ent stages. The presser foot is brought to

its 2nd lifting height by strongly depress-

ing the back part of pedal.

4-2. Presser foot lifting height setting function in the case the sewing machine stops

with its needle-bar up.

The amount of uplift of the

presser foot above the throat

plate varies according to the

material thickness of the item

to be sewn and the presser

foot pressure. Be sure to

check the actual condition

before starting sewing.

4-3. Presser operating speed changing function

For reducing the operating noise or fur-

ther reducing the material damage by the

presser foot when it is lowered to contact

the material, the presser operating speed

can be changed appropriately.

Factory-set value : 100

Adjustable range : 100 to 500

[ 1st lifting height of presser foot ]

Factory-set value : 5.0

Adjustable range : 0.1 to 8.5

[ 2nd lifting height of presser foot ]

Factory-set value : 8.5

Adjustable range : 8.5 to 13.5

In the case the set value of the 2nd lifting height of presser foot is changed, the needle

tip protrudes from the undersurface of presser foot. In such a case, be sure to carefully

check whether the needle tip interferes with the material or whether the needle breaks.

In this case, carefully prevent the needle-tip interference with the material item or the

needle breakage.

– 7 –

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