JUKI LBH-1700 User manual

Computer-controlled Lockstitch Buttonholing Machine
LBH-1700
Introducing the World's First Electronic Buttonholing Machine,
marking the beginning of a new era.
●LBH-1700SA

The World's First
The World's First

Needle thread tension controlled by active-tension.
(electronic thread-tension-control system)
IMPROVEMENTS OF SEWING PERFORMANCE
• Needle thread tension for sewing parallel and bartacking sections of buttonholes
can be separately controlled through the operation panel and stored in memory
according to various sewing conditions (e.g., type of thread, type of material and
sewing speed).
• The machine is able to change the needle thread tensions at the parallel and
bartacking sections of the buttonhole, to produce a
beautiful buttonhole shape.
This capability helps greatly in preventingthread breakage.
• Needle thread tension is activated at the beginning and
end of sewing. This prevents unthreading of the needle
thread, and thread fraying that is likely to occur at the
beginning of sewing.
Reduction in
cycle time.
HIGHER PRODUCTIVITY
•The duration of low
speed sewing, before
the end of sewing, has
been shortend.
The machine is able to perform cycle sewing.
• Three different cycle sewing programs can be registered, each of which can store
up to 15 different patterns in memory.
• Data on needle thread tension, buttonholing length, stitching shape, etc., can be entered
to enable automatic changing according to a specific sewing condition.
<Example> Men's shirts : Change in the needle thread tension for sewing the first
button from the cuffs and change in button size for a button-down collar.
Ladies' wear : Change in buttonhole shape
Totalproductivity
is increased.
•The amount of time
required to change the
stitching shape and to
adjust the sewing size is
dramatically reduced at
the digital operation
panel.
Active tension
Feed mechanism using a stepping motor.
• The feed mechanism eliminates differences in stitch pitch between forward and
reverse feeds. This produces beautifully-shaped buttonhole.
• The feed mechanism achieves constant position stopping at the end of sewing.
• The feed mechanism allows the machine to sew exact square bartacks and exact
round tacks.
• The machine comes with an intermittent feed system to eliminate stitch skipping
or thread breakage due to needle swaying.
• The cloth cutting length (buttonhole length) can be easily changed at the operation panel.
Base line is controlled by a
stepping motor.
• The zigzag width can be changed without having to use a
tool.
• The optimum clearance between the knife and the parallel
section of a buttonhole can be easily adjusted to prevent
the knife from cutting
the seam.
Stepping motor for
controlling base line.
Stepping motor for
controlling zigzag width.
Tying stitches, soft start and speed
control.
•The machine is capable of sewing
tying stitches at the end of sewing to
prevent the thread from fraying.
•With its soft-start function, the
machine is able to establish the
number of stitches and sewing speed
at the beginning of sewing to prevent
unthreading of the needle thread.
The sewing speed can be
independently controlled for the
first through fifth stitch.
• With the speed control function, the
sewing speed can easily be changed
to a lower speed when sewing
difficult-to-sew material.
Slide speed
controller

HIGHER FLEXIBILITY
Many different buttonhole shapes can be selected on the operation panel.
The machine is provided as standard with seven different stitching shapes.
New basting stitch is available. Sewing conditions can
be easily changed on
the operation panel.
•Using the operation panel, the
material cutting length, overedging
width, stitch pitch at the parallel
section of buttonholes, lateral-
position correction of bartacking
width, lateral-position correction of
knife groove width, and the
clearance provided between the
knife groove and bartacks can
easily be changed.
Changeover between purl stitching
and whip stitching can be performed
easily on the operation panel.
(When changing over the stitching mode from purl
stitching to whip stitching or vice-versa, thread eyelet
of bobbin case and bobbin thread tension may also be
required to change depending to the stitching mode
selected.)
Changeover between single
stitching and double stitching
can be easily performed.
• For double stitching, only the parallel portions of a
buttonhole will be stitched under the double
stitching mode while skipping the bartacking
sections. This allows the bartacks of a button-
hole to remain soft.
Shape of finished seam by
the first round of sewing.
Double stitching
(The state where the fabric is forcibly stretched
after the completion of sewing the buttonhole.)
Basting stitch
• The newly adopted bastingstitch is effective on elastic materials such as knits.
• The basting stitch helps prevent distortion when sewing knit or stretchy
materials.
Without basting stitch With basting stitch
Improved knife mechanism.
• Knife replacement is no longer necessary when changing
the buttonhole size.
• To support the small-lot production
system where the buttonholing size is
frequently changed or the cycle sewing
for buttonholes that are different in size,
the number of times the knife
is dropped to cut the material
can be automatically establis-
hed according to the button-
holing size.
The buttonhole shapes marked with an asterisk (*) can be selected through the operation panel.
Square＊ Radial and
square＊ Half-moon (round)＊ Radial
Square and
half-moon (round)
Radial, with
taper bar
Radial, with straight
bartacking
• The knife supports a
cloth cuttinng length of
up to 67mm. (Available
by special order)
• With the knife mech-
anism, the machine is
capable of sewing seat
belt openings on baby
strollers and infant car
seats.
67mm67mm
• New buttonholing shapes are added.
The machine is now able to sew
buttonholes with radial tacks and
those with larger-pitch tacks to offer
handstitch-like appearance.
• The machine is able to store as many
as 89 different sewing patterns in
memory to permit the free selection.
Purl stitching Whip stitching
• Cloth cutting knife can be easily turned on and off on the
operation panel.
• The cloth cutting knife on/off feature is used in cases, such
as sham buttonholing, where the knife is not required to
operate.
• If the cloth cutting
knife remains in the
bottom position, the
machine
willstop.

• The machine is no longer equipped with a belt, stop-
motion mechanism or cam, and noise and vivration
when dropping the knife has been greatly reduced.
• The needle can be moved to the far right position,
away from
the cloth
cutting knife,
by pressing
the needle
threading
switch.
EASY-TO-OPERATE MULTI-FUNCTIONAL OPERATION PANEL
EASY MAINTENANCE
Drastic reduction of the number of
mechanical parts.
• The machine no longer has a stop-motion mechanism
and require no adjustment.
• The independent knife drive mechanism eliminates the
need for adjustment of knife-dropping timing.
It also helps prevent troubles such as faulty
dropping or double dropping of the knife.
The machine offers a comfortable
working environment.
Error indicator on
the operation panel.
• The error indicator on the
operation panel allows repair
work to be done with ease.
Direct-drive motor is adopted.
The machine incorporates
a direct-drive motor.
This means that motor
installation and belt
adjustment procedures
are not required at the
time of setup.
All pieces of data on sewing specifications can be established/selected
on the operation panel.
● The operation panel permits hand-held manipulation. ●
List of major functions of the operation panel
Function
Item
Pattern No.
Needle threading
Counter
Thread tension
Programming
of data on detailed
stitching shape
Selection of
stitching shape
Selection between
single/double stitching
Performance of the
cloth cutting knife
Work clamp selection
Forward / backward
travel of feed
Change of sewing
speed
Moves the needle bar to the far right position
of its stroke when threading the needle.
UP counter
→To be used as the counter for the No. of pcs.
DOWN counter
→To be used as the bobbin thread counter.
Establishes thread tension for sewing parallel
sections and bartacking sections of buttonholes.
Enables and disables the knife operation.
Selects the work clamp size.
Moves the feed forward / backward stitch by stitch.
Changes the sewing speed with the slide speed
controller.
Changes over between single stitching and
double stitching.
Selects one of seven stitching shapes.
Square*, radial and square*, half-moon (round)*,
radial, half-moon and radial, radial with taper bar,
radial with straight bartacking(*Three of the seven
stitching shapes can be selected on the operation
panel by a simple, one-touch operation.)
Establishes data on detailed parts of the stitching
shape such as the overedging width,
parallel-section stitch pitch, lateral position
correction of the bartacking groove, lateral position
correction of the knife groove width, clearance,
and material-cutting width.
Invokes patterns stored in memory.
Sewing position
of needle bar Needle bar to the
far right position
• The size of buttonhole to be sewn can be
changed at the operation panel without
the use of tools.
No tools required to
change the buttonhole size.
＊

LBH-1700 with an
auto-lifter.
The auto-lifter allows a single pedal switch
to be used not only for moving the work
clamp up and down, but also for starting
the machine. This makes operation more
comfortable by reducing the operator's
fatigue. Two types of auto-lifter are
available: the magnet-driven (B type) and
the air-driven (C type).
●LBH-1700SB(magnet-driven type)
■OPTIONS
First buttonhole spacing guide
(for men's shirts)
Q060 Part No. : MAQ-06000-0A0
A ruler used to place the first buttonhole at a
predetermined location on a men's shirts based
on the shape of the collar.
Buttonhole interval gauge
A ruler used to place the next buttonhole at a predetermined interval relative to the previously finished buttonhole.
For lateral buttonholes on the right front of the garment bodies Part No. : B9402-771-000
For lateral buttonholes on the left front of the garment bodies Part No. : B9402-771-00A
For vertical buttonholes Part No. : B9401-761-000
Pedal unit for standing work
2-pedal unit for standing work (asm.)
Junction cable (asm.) Part No. : GPK-51001-0B0 (1 pc.) Part No. : M9013-590-0A0 (1 pc.)
Thread tension control knob
The thread tension control knob is used to finely adjust the designated thread tension.
Thread tension control knob (asm.) Part No. : M8525-600-0B0 (1 pc.)
First buttonhole spacing guide
(for ladies' blouses)
Q061 Part No. : MAQ-06100-0A0
A ruler used to place the first buttonhole at a
predetermined location on a ladies' blouse
based on the shape of the collar.
Electric bobbin winder
Can be mounted on the table for the operator’s convenience.
Electric bobbin winder (asm.)
Power cord (asm.)
Tension controller (asm.)
Wood screws
Part No. : G5001-198-0A0-A (1pc.)
Part No. : M8524-600-0A0 (1 pc.)
Part No. : B3221-771-0A0 (1 pc.)
Part No. : SK-3452000-SC (4 pcs.)

■SPECIFICATIONS
■WHEN YOU PLACE ORDERS
＊Accessories for the work clamp and knife
*The auto-lifter cannot be retrofitted to the machine.
• To order, please contact your nearest JUKI distributor.
LBH-1700S□
［Machine head］
MC-600□
［Control box］
Please note when placing orders, that the model name should be written as follows:
Single-phase
3-phase
For CE Single-/3-phase 220V〜415V
(Not provided with a power switch)
220V〜240V
220V〜240V
220V〜415V
Max. sewing speed
Needle bar stroke
Buttonhole length (mm)
Number of stitches
Needle (at the time of delivery)
Hook
Lift of the work clamp
Material feeding method
Number of patterns that can be input
Machine head drive system
Power consumption
Lubrication
Lubricating oil
3,600rpm
34.6mm
Displayed at the digital operation panel
Knife size : 6.4 〜31.8
Stitch pitch : 0.2 〜0.7
Bartacking length : 0.7 〜5.0
Bartacking width (max.) : 5.0
Knife groove width : 0 〜1.5
Automatically computed from the size of the buttonhole and stitch pitch
DP×5 (＃11J) ＃11〜＃14J
DP type, full-rotary hook
Max. 12 mm
Intermittent feed by a stepping motor
Max. 89 patterns
Compact AC servomotor (direct-drive system)
400VA
Automatic
JUKI New Defrix Oil No.1 (equivalent to ISO VG7)
Weight Machine head (include motor) 63kg, Control box 13.5kg
Work clamp lifter
Standard (2-pedal unit)
Auto-lifter (magnet-driven type)
Auto-lifter (air-driven type)
A
B
C
Code
*
Knife size: 6.4 〜19.1mm
Knife size: 6.4 〜25.4mm
Knife size: 6.4 〜31.8mm
Part No.:B2702-047-K00
Part No.:B2702-047-L00
Part No.:B2702-047-M00
Part No.:B2702-047-Q00
Part No.:B2702-047-S00
Factory installed on machine head
Supplied as an accessory (1 pc.)
Supplied as an accessory (1 pc )
Supplied as an accessory (1 pc.)
Factory installed on machine head
Supplied as an accessory (1 pc.)
Supplied as an accessory (1 pc.)
Supplied as an accessory (1 pc.)
Part name Size/Part No. Accessory
Work clamp 1
Work clamp 2
Work clamp 3
Knife 9.5mm (3/8")
Knife 12.7mm (1/2")
Knife 15.9mm (5/8")
Knife 25.4mm (1")
Knife 31.8mm (1-1/4")
K
D
L
M
Code
Power supply

INTERNATIONAL SALES H.Q.
8-2-1, KOKURYO-CHO, CHOFU-SHI,
TOKYO 182-8655, JAPAN
PHONE : [phone]〜4
FAX : [phone]
TELEX : J22967
http://www.juki.co.jp
✽ Specifications and appearance are subject to change without prior notice for improvement.
✽ Read the instruction manual before putting the machine into service to ensure safety.
April, 2001 Printed in Japan(M)