JUKI LBH-1700 User Manual

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1. SPECIFICATIONS
Model
Stitch width (max.)
Length of buttonhole
(length of knife)
Stitch length (max.)
1 Sewing speed
2 Needle
3 Needle bar stroke
4 Thread take-up lever
5 Hook
6 Lift of work clamp check
7 Bobbin winder
8 Feed drive method
9 Dimensions
10 Weight of machine head
11 Adjustment of needle thread
12 Data that can be stored in memory
13 Bar-tacking shape
14 Change-over of 1/2 stitching
15 Input voltage classification
16 Motor
17 Lubrication method
18 Lubricating oil
When presser type 1 is used
4 mm
6.4 to 19.1 mm
(1/4" to 3/4")
25 mm
When presser type 3 is used
5 mm
6.4 to 31.8 mm
(1/4" to 1-1/4")
41 mm
LBH-1700
LBH-1702
5 mm
6.4 to 25.4 mm
(1/4" to 1")
35 mm
Standard 3,000 rpm (Number of revolution can be controlled.) Max. 3,600 rpm
DP X 5J (SCHMETZ 134R)
34.6 mm
Link thread take-up lever
DP type full-rotary automatic lubricating hook
12 mm
Built-in machine head type
Drive by stepping motor, rack and pinion
Width of machine bed : 185 mm
Height (from table top surface to top end of top cover) : 364 mm
Length (from front end of machine bed to rear end of motor cover) : 630 mm
50 kg
Active tension method
Digital setting for each section by means of operation panel (Parallel section tension,
bar-tacking section tension)
Max. 89 patterns
Square shape, radial shape, round shape (selection by operation panel)
Radial taper bar, Radial straight bar
Each pattern can be set.
Domestic : 1ø 100V/ 3ø 200V
Export : 1ø 100 to 240V 1ø 220 to 415V
3ø 200 to 240V 3ø 220 to 415V
Compact AC servo motor 450W
Direct-drive method
Automatic lubrication method
JUKI New Defrix oil No.1 (Equivalent to ISO VG7)
When presser type 2 is used
5 mm
6.4 to 25.4 mm
(1/4" to 1")
35 mm

JUKI LBH-1700 Specifications

General

Stitch Type	Lockstitch
Needle Type	DB x 1
Motor	Servo Motor
Weight	45 kg
Lubrication	Automatic
Type	Lockstitch
Buttonhole Length	Adjustable

Summary

1. SPECIFICATIONS

2. STANDARD ADJUSTMENT

Height of the needle bar

Adjusting needle bar height at lowest dead point for proper clearance.

Needle-to-hook timing

Aligning needle and hook for correct stitch formation and timing.

Stitch width PM arm and backlash adjustment

Adjusting clearance and smooth operation of stitch width gears and PM arm.

Stitch base line stepping motor origin detection

Setting origin sensor for centered needle detection.

Stitch width stepping motor origin detection

Setting origin sensor for centered needle at zero stitch width.

Presser and feed shaft longitudinal position

Setting presser and feed shaft distance from needle hole and end faces.

Knife drop position

Ensuring the cloth cutting knife drops correctly into the center groove.

Knife bar/position and stroke adjustment

Needle thread trimmer control lever adjustment

Setting clearance between trimmer control lever and arm when safety hook engages.

Stop-motion solenoid adjustment

Needle thread trimmer longitudinal amount

Adjusting the longitudinal movement of the needle thread trimmer arm.

Needle thread trimmer lateral position

Aligning trimmer with needle and setting lateral protrusion.

Needle thread trimmer height adjustment

Installing trimmer low, avoiding contact with the presser.

Needle thread winding position at sewing start

Needle thread trimmer opening timing

Adjusting trimmer opening timing for gradual opening.

Needle thread trimmer lever adjustment

Bobbin thread trimmer/clamp plate position

Bobbin thread trimmer timing and opening amount

Adjusting trimmer opening amount, timing, and bobbin winder trip latch.

Presser height adjustment

Thread tension solenoid adjustment

Thread breakage detecting plate adjustment

Presser lifting solenoid adjustment

3. DISASSEMBLING/ASSEMBLING PROCEDURE

Hook driving shaft disassembling/assembling

Main shaft disassembling/assembling

4. ADJUSTMENT OF THE ORIGIN SENSOR

Upper detecting plate adjustment procedure

Stepping motor origin adjustment procedure

Calibrating feed, stitch base line, and stitch width motor origins.

6. DESCRIPTION OF OPERATION PANEL

Sewing Data Overview

Supplementary Explanation of Sewing Data

Needle Thread Tension Timing Adjustment

7. MEMORY SWITCH

How to use the memory switch

How to set the memory switch

8. TEST MODE

How to use the test mode

Guide for sensor input checks and troubleshooting using the test mode.

9. ERROR DISPLAY LIST

10. TROUBLES AND CORRECTIVE MEASURES

Sewing-related troubles

Troubleshooting sewing issues like needle thread breakage and stitch skipping.

Mechanical component troubles

Troubleshooting mechanical problems like cloth cutting knife failures.

Electrical component troubles

Diagnosing and resolving issues with electrical components and errors.