JUKI LS-1342-7 User Manual

−1 −
1. SPECIFICATIONS
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Item
Model
Model name
Application
Sewing speed
Needle
Thread possible to be
sewn
Thread possible to be
trimmed
Stitch length
Presser foot lift
Stitch length adjusting
mechanism
Reverse stitch adjusting
method
Thread take-up
Needle bar stroke
Alternate foot stroke
Hook
Feed mechanism
Top and bottom feed
actuation mechanism
Thread trimming
mechanism
Lubrication
Lubricating oil
Cylinder bed diameter
Free space for sewing
Size of handwheel
Motor
Specifications
LS-1341
LS-1342 LS-1342-7
Cylinder-Bed, 1-
Needle, Unison
Feed, Lockstitch
Machine with
Automatic
Thread Trimmer
(Large Hook)
Cylinder-Bed, 1-Needle, Unison
Feed, Lockstitch Machine
(Large Hook)
For heavy-weight materials
Max. 2,500 rpm
#50 to #8 #40 to #5 #30 to #5
#30 to #5
Max. 6 mm (normal/reverse feed)
Hand lifter : 9 mm Knee lifter : 16 mm
By dial
Lever type
Slide thread take-up
36 mm
Ellipse feed
Timing belt
Central oil wick lubrication by tank (partially by manual)
JUKI New Defrix Oil No. 2 (equivalent to ISO VG32)
72mm
255 x 100 mm
V belt effective diameter : ø93.3 mm Outer diameter : ø160 mm
4P, 400W SC-380
SCHMETZ 135 X 17 Nm 100 to 180 Standard : Nm 160
Air cylinder type
(with touch-back
switch)
2.5 mm to 6.5 mm Slot adjusting type
1 mm to 6.5 mm Alternate foot stroke
adjusted by dial
Full-rotary vertical-
axis standard hook
(Latch type)
Full-rotary vertical-
axis 1.6-fold hook
(Cap type)
Full-rotary vertical-axis 1.6-fold hook
(Latch type)
Cam-driven
scissors type
LS-1340
Cylinder-Bed, 1-
Needle, Unison
Feed, Lockstitch
Machine
(Standard Hook)
SCHMETZ 135
X 17 Nm 100 to
180 Standard :
Nm 140

JUKI LS-1342-7 Specifications

General

Max Stitch Length	5 mm
Lubrication system	Automatic
Type	Single Needle Lockstitch Sewing Machine
Max. sewing speed	2500 stitches/min
Hook	Vertical
Lubricating oil	JUKI Machine Oil
Stitching Speed	2, 500sti/min
Motor	Servo Motor

Summary

Standard Adjustment Procedures

Needle Entry Position Adjustment

Adjusts the needle's entry into the fabric for precise stitching.

Longitudinal Feed Dog Position

Sets the forward/backward movement of the feed dog for stitch formation.

Lateral Feed Dog Position

Aligns the feed dog's side-to-side movement with the needle hole.

Feed Dog Height Adjustment

Controls the vertical lift of the feed dog for proper fabric feeding.

Needle-to-Hook Timing

Synchronizes needle and hook movement for stitch formation.

Hook Height Adjustment

Sets the vertical position of the hook relative to the needle.

Inner Hook Guide Adjustment

Guides the hook correctly during rotation to prevent thread snagging.

Presser Foot Lift Adjustment

Adjusts how high the presser foot raises for fabric handling.

Feed Cam Timing

Synchronizes the feed mechanism's movement with the needle.

Feed Motion Adjustment

Controls the amount of alternate vertical movement of the feed dogs.

Horizontal Feed Arm Adjustment

Adjusts the horizontal movement of the feed mechanism.

Stitch Length for Normal/Reverse Feed

Sets the stitch length for both forward and reverse sewing.

Balancer (LS-1340 & LS-1341)

Balances machine operation for specific models.

Reverse Feed Control Lever Position

Sets the position of the lever for controlling reverse feed.

Safety Clutch Operation

Protects the machine from overload by disengaging the drive.

Standard Adjustment of Thread Trimmer Components

Thread Trimmer Device Adjustments

Adjustments related to the thread trimming mechanism's components.

Alternate Vertical Dial Settings

Settings for the alternate vertical movement control.

SC-380 Adaptation for LS-1342/1342-7

Configuration for using SC-380 with specific machine models.

Installation of Optional Parts

Automatic Reverse Feed Device Installation

Steps for installing the automatic reverse feed mechanism.

Automatic Presser Foot Lifter Installation

Procedures for installing the automatic presser foot lifter.

DL Device Installation (LS-1342)

Installation instructions for the DL device on the LS-1342 model.

Knee Lifter Shaft (Pedal Type) Installation

Installation of the knee lifter mechanism for pedal operation.

Binder Kit Installation

Instructions for installing a binder kit for edge finishing.

Portions Requiring Loctite Application

Selective and Consumable Parts

Engraved Marker Dots on Handwheel

Lubrication Route Diagram

Troubleshooting and Corrective Measures

Sewing Troubles and Solutions

Troubleshooting sewing issues like thread breakage and skipped stitches.

Thread Trimming Troubles and Solutions

Troubleshooting problems related to the thread trimming function.

Table Drawing