JUKI LU-2810-6 Bedienungsanleitung

LU-2810-6, 2860-6

INSTRUCTION MANUAL

CONTENTS

1. SPECIFICATIONS.......................................................................................................... 1

2. INSTALLATION.............................................................................................................. 1

3. INSTALLING THE BELT COVER AND THE BELT ....................................................... 2

4. ADJUSTING THE BELT TENSION................................................................................ 3

5. INSTALLING THE SYNCHRONIZER ............................................................................ 3

6. ADJUSTING THE SYNCHRONIZER............................................................................. 4

7. INSTALLING THE OIL SHIELD..................................................................................... 6

8. PNEUMATIC COMPONENTS........................................................................................ 6

9. WIRING THE MACHINE HEAD..................................................................................... 8

10. AIR PIPING AND MACHINE-HEAD WIRING .............................................................. 11

11. SEWING SPEED TABLE ............................................................................................. 12

CAUTION

This Instruction Manual for the LU-2810-6/-2860-6) only describes their differences from the

standard models (LU-2810/-2810-7, LU-2860/-2860-7).

For safety-related information, carefully read and fully understand "Safety precautions"

described in the Instruction Manual for the standard models before using your sewing ma-

chine.

– 1 –

Model

LU-2810-6

(1-needle sewing machine with a thread trimmer

and V-belt)

LU-2860-6

(2-needle sewing machine with a thread trimmer

and V-belt)

Sewing speed

Max. 3,000 sti/min Max. 2,700 sti/min

Refer to "11. SEWING SPEED TABLE" p.12.

Stitch length (max.) Normal feed : 9 mm Reverse feed : 9 mm

Needle GROZ-BECKERT 135 x 17

(Nm 125 to Nm 180) (Standard : Nm 160)

Thread #30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)

Hook Vertical-axis 2.0-fold capacity hook

Lift of presser foot Hand lifter lever : 10 mm By knee lifter, Auto-lifter: 20 mm

Lubricating oil JUKI New Defrix Oil No.1 or JUKI MACHINE OIL #7

Noise

* 1

-Equivalent continuous emission sound pressure

level (LpA) at the workstation:

A-weighted value of 83.0 dB; (Includes KpA = 2.5

dB); according to ISO 10821- C.6.2 - ISO 11204

GR2 at 3,000 sti/min.

-Sound power level (LWA);

A-weighted value of 88.5 dB; (Includes KWA = 2.5

dB); according to ISO 10821- C.6.2 - ISO 3744

GR2 at 3,000 sti/min.

-Equivalent continuous emission sound pressure

level (LpA) at the workstation:

A-weighted value of 83.0 dB; (Includes KpA = 2.5

dB); according to ISO 10821- C.6.2 - ISO 11204

GR2 at 2,700 sti/min.

-Sound power level (LWA);

A-weighted value of 88.5 dB; (Includes KWA = 2.5

dB); according to ISO 10821- C.6.2 - ISO 3744

GR2 at 2,700 sti/min.

1. SPECIFICATIONS

2. INSTALLATION

Refer to "2. INSTALLATION" p.2 in the Instruction Manual for the LU-2810, -2810-7, -2860 and -2860-7,

packaged with the sewing machine, for how to install the sewing machine.

* 1 The aforementioned noise level is the one in the case of using the control box (SC-922) made by JUKI.

– 2 –

3. INSTALLING THE BELT COVER AND THE BELT

(Installation procedure)

1) Remove belt cover A ❶.

2) Pass the 14P connector which puts cables to-

gether and the air tube through the slotted hole

in the table.

3) Put the V-belt on the sewing machine pulley.

4) Adjust the belt tension.

5) Pass synchronizer support shaft ❷and washer

❸through mounting hole in belt cover A ❶and

x the synchronizer support shaft with washer

❸and nut ❹.

6) Mount belt cover A ❶.

7) Install belt cover B ❺on the table.

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

❶

❺

Slotted hole in

the table

V-belt

❶

❸❷

❸❹

❶

Be sure to use the sewing machine with

safety devices ❶and ❺installed.

– 3 –

5. INSTALLING THE SYNCHRONIZER

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

(Installation procedure)

1) Fix synchronizer ange ❶on the end of the

main shaft.

2) Fix the synchronizer on synchronizer ange ❶.

3) Fix synchronizer support plate ❷with setscrew

❸so as to prevent the synchronizer from rotat-

ing.

Be sure to remove the connector for the

sewing machine for the sake of safety be-

fore checking the upper and lower positions

of the synchronizer.

❶

❷❸

Synchronizer

4. ADJUSTING THE BELT TENSION

Adjust the belt tension with the height of the motor

so that the belt sags 15 mm when the center of V

belt is applied with a 9.8 N load.

15mm

Motor pulley

Handwheel

9.8N

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

– 4 –

❷

❶

6. ADJUSTING THE SYNCHRONIZER

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

Adjust the upper stop position (needle-up stop posi-

tion) so that the marker line on belt cover A ❷aligns

with the marker dot (one) on handwheel ❶(70 °po-

sition).

Adjust the lower stop position (needle-down stop

position) so that the needle bar stops at the position

where the needle bar goes up from the lower dead

point (180 °) by approximately 13 mm (120 °posi-

tion). (The position which is reached by turning the

handwheel from the lower end of the needle bar in

the reverse direction of rotation of the main shaft (di-

rection C))

Marker dot

Marker dot on the handwheel

Opener timing adjustment

(three marker dots)

314 °

Thread trimming

cam alignment

(two marker dots)

275 °

Upper stop position

(one marker dot)

70 °

Marker line

– 5 –

(How to remove the handwheel)

To remove handwheel ❶, loosen screws ❷and ❸

and remove handwheel ❶in such a state that it is

assembled with handwheel A ❹.

Do not remove only handwheel ❶by loos-

ening setscrew ❺.

(How to assemble the handwheel)

Check to make sure that handwheel A ❹does not

come in contact with cylinder ❼when screw ❷of

handwheel A ❹is brought to the position where it is

aligned with the at section of main shaft ❻. Then,

fix the handwheel on main shaft ❻. At this time,

main shaft ❻protrude from handwheel ❶by ap-

proximately 7 mm.

❺

❶

❷

❸

❹

❼

❻

Flat section

– 6 –

7. INSTALLING THE OIL SHIELD

Install oil shield ❶, supplied with the unit, on the

frame with screws ❷.

8. PNEUMATIC COMPONENTS

(1) Installing the solenoid valve mounting plate

Install solenoid valve mounting plate asm. ❶to

the undersurface of the table with screw ❷and

washer ❸supplied with the unit.

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

WARNING :

To protect against possible personal injury due to abrupt start of the machine, be sure to start the

following work after turning the power off and ascertaining that the motor is at rest.

LU-2810-6

LU-2860-6

❷

❶

❷

❶❷

❶

❸

❷

– 7 –

(4) Adjusting the air pressure

1) The operating air pressure is 0.5 to 0.55 MPa.

Adjust the air pressure with adjusting knob ❶of

the regulator.

2) When water has accumulated in regulator A

section, turn drain cock ❷to drain the water.

Decrease Increase

(3) Installing the regulator

1) Install regulator (asm.) ❶on mounting plate

❺with screw ❷, spring washer ❸and nut ❹

which are supplied with the unit.

2) Install couplings ❻and ❼on regulator ❶.

3) Install mounting plate ❺on the underside of the

table.

4) Connect ø6 air tube coming from the solenoid

valve asm. to coupling ❻.

❷

❶

❺

❻

❼

❹

❸

(2) Connecting the air tube and the solenoid

valve cable

Connect the air tubes and the solenoid valve

supplied with the unit to the locations shown

below.

Solenoid valve Tube number Cable number

❶- B1

CN155

❶- A2

❷- A4 CN151

❸- A6 CN153

❹- A8 CN152

ø8 air tube

ø6 air tube

❶

❷

❸

❹

Solenoid valve

cable

❶

❷

– 8 –

9. WIRING THE MACHINE HEAD

WARNING :

Junction cord preparation and wiring to the control box must be carried out by an electrical engineer

without exceptions. Be sure to turn off the power to the sewing machine and wait for ve minutes before

starting the wiring work.

If the pin numbers of the connectors are not correctly connected, errors and breakage of parts and

control box can result. Carefully connect the machine-head connectors and the control-box connectors.

❶

❷

(5) Exhaust tube

Pass ø8 exhaust air tube ❶through hole ❷in

the table stand and other relevant hole. Then,

route the air tube downward. If the humidity is

high, water may come out of the air tube.

(1) Wiring diagram

Details of the connectors wired to the machine head are as described below.

Refer to "(2) Details of connectors" on the next page for details of connectors ①to ④and layout of

the pins.

Tension release solenoid (upper side)

Tension release solenoid (lower side)

Alternate up/down limit switch

Reverse feed switch

6-gang switch

Thread trimming solenoid (right side)

Thread trimming solenoid (left side)

Presser bar lifting cylinder solenoid valve: CN151

Alternate up/down cylinder solenoid valve: CN153

2-pitch cylinder solenoid valve: CN155

FG (earth cord)

Knee switch

③: CN144 / 16P connector

6-gang switch

④: CN102 / 12P connector

Solenoid valve

②: CN36 / 14P connector

Tension release solenoid (lower side)

Tension release solenoid (upper side)

Thread trimming solenoid (left side)

Thread trimming solenoid (right side)

Reverse feed switch

FG (earth cord)

Knee switch

①: CN158 / 4P connector

Alternate up/down limit switch

(lower side)

Alternate up/down limit switch

(upper side)

Reverse feed cylinder solenoid valve: CN152

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