JUKI LU-1520N-7 User manual

LU-1520N-7-0BBAA/XC-E500
Instantaneous change-over device for the alternate vertical
movement amount: DL device
Bobbin thread remaining amount detecting device: AE-10
Operation panel: XC-E500
Options
1-needle, Unison-feed, Lockstitch Machine
with Vertical-axis Large Hook and Automatic Thread Trimmer
(needle thread roll-in and short tail type)
1-needle, Unison-feed, Lockstitch Machine
with Vertical-axis Large Hook and Automatic Thread Trimmer
(needle thread roll-in and short tail type)
LU-1520N-7
LU-1521N-7
LU-1520N-7
LU-1521N-7
[Gauge for LU-2200]
[Gauge for LU-2200]
[Gauge for standard]
[Gauge for standard]

Presser
foot
Sewing product
Walking
foot
Sewing product
Feed
Sewing product
Walking
foot
Presser
foot
Comparison of the remaining thread length (with reverse stitching)
LU-1520N-7
Conventional machine
Right side Wrong side Right side Wrong side
End of sewing
Beginning
The remaining length of thread at the end of sewing
is substantially shortened to approximately 5mm.
The machine cuts thread as thick as #5 without fail.
Even if the needle thread is clamped under the
presser foot or walking foot, the machine draws the
needle thread onto the underside of the material
without fail, leaving no exposed thread on the right
side. The needle thread drawn onto the underside of
the material can be sewn under the seam.
The end-of-sewing thread is kept in the seam
allowance both at the beginning and end of sewing
and does not jut out from the material edge.
This function eliminates the need for thread snipping.
The operator is able to concentrate on sewing work
without having to perform thread snipping work,
thereby dramatically increasing productivity.
The frequency of scissor use by the operator is
significantly reduced, thereby preventing accidents
in which the scissors damage the material.
Conventional machines
Rectangular feed Alternating vertical movement mechanism
•Compared with the elliptical feed, the
rectangular feed helps reduce gathered
stitches.
•The ratio of alternate vertical movement
remains unchanged even when the
material thickness changes.
The newly developed mode of highly rigid rectangular feed
guarantees outstanding feed performance. In addition, the ratio
between the alternating vertical movements of the walking foot
and presser foot remains unchanged even when the material
thickness changes. With this feature, the machine sews multi-
layered parts of the material consistently and without stitch
gathering.
The vertical stroke of the presser foot and walking foot (amount of
alternating vertical movement) can be easily changed with the
large dial mounted on the top of the machine head. The sewing
speed is automatically regulated based on the vertical stroke
setting.
This ensures ideal sewing conditions at all times.
The machine is equipped as standard with a mechanism to correct
uneven material feed by making-micro adjustments to the bottom-
feed.
Thread snipping is no longer required at the beginning and end of sewing.Thread snipping is no longer required at the beginning and end of sewing.
Consistent seam quality.Consistent seam quality.
Thread snipping is no longer required at the beginning
and end of sewing. This is a high-performance machine
that is ideally suited to the sewing of car seats.
Thread snipping is no longer required at the beginning
and end of sewing. This is a high-performance machine
that is ideally suited to the sewing of car seats.
Thread snipping work that has traditionally been required by
conventional machines can now be virtually eliminated, thereby
drastically increasing productivity.
In addition, jut-out thread problems or accidents in which the
material is damaged by scissors during sewing can be prevented.
The machine contributes to reduced cost and upgraded quality in the
sewing of car seats.
Thread snipping work that has traditionally been required by
conventional machines can now be virtually eliminated, thereby
drastically increasing productivity.
In addition, jut-out thread problems or accidents in which the
material is damaged by scissors during sewing can be prevented.
The machine contributes to reduced cost and upgraded quality in the
sewing of car seats.
LU-1520N-7, LU-1521N-7
●
●
●
●●
●

DL switch
Detecting switch
The SC-380 is provided with many
different standard functions,
including speed-control, soft-start,
automatic reverse stitching with
the specified number of stitches,
constant-dimension stitching, and
overlapped (multi-layered)
stitching. These functions ensure
sewing performance optimally
suited to the material and
process.
The XC-E500 is provided with program sewing and a host
of other functions that contribute to increased efficiency.
Needle thread
roll-in device switch
Reverse stitch lever
Large handwheel
Dial for adjustment of
alternating vertical
movement
Stitch dial
XC-E500
The stitch length can be easily selected with
the stitch dial. The machine's enhanced
operability features include placement of the
bobbin thread winder on the front face of the
machine arm, a large handwheel (φ160mm)
and an easy-to-use reverse stitch lever.
A walking foot mechanism is built into the
machine arm to prevent oil from scattering.
Bobbin thread winder
Part No.: GDL-21000FA0
The DL device can be used to instantaneously
maximize the alternate vertical movement
amount. This device is useful, in particular, in
processes for sewing products with many
multi-layered parts.
The machine is provided with both hand
switch and knee switch.
Application Part name Part No. Remarks
Gauge for light-weight materials Feed dog 213-99209 Width 4.5mm, Needle hole φ2.2
Throat plate 213-99605 With no knurl on the top face, groove width 5.0mm
Toothed gauge Walking foot B1470-562-BA0 Width 13mm
Presser foot B1525-562-BA0 Width 4.5mm, Needle hole φ2.2 (with groove)
Excellent operability and maintainability.Excellent operability and maintainability.
Operation panel that improves functions
of the sewing machine (optional)
AC servomotor/controller SC-380
OPTIONS
GAUGE
● Instantaneous change-over device
for the alternate vertical
movement amount: DL21 (F kit) Part No.: GAE-10000AA0
The bobbin thread remaining-amount detecting device warns the operator with
a buzzing sound and lamp indication of the time for bobbin thread replacement.
This allows the operator to concentrate on sewing work without concern for
the remaining amount of bobbin thread.
Since the device directly detects the bobbin thread amount remaining,
cumbersome setting is no longer required regardless of the material, thread
and process.
● Bobbin thread remaining amount detecting device:
AE-10 (Kit A)
●
●
●
●

＊ JUS: North America and Central and South America.
[PSC box/operation panel for SC] [Motor for SC]
LU152 N70BB
SC380 M
WHEN YOU PLACE ORDERS
Model name LU-1520N-7
LU-1521N-7
Max. sewing speed 3,000rpm
Max. stitch length 9mm (Normal/Reverse feed)
Needle bar stroke 36mm
Lift of the presser foot By hand: 9mm／Auto: 16mm
Auto-lifter Provided as standard (Pneumatic auto-lifter: AK124B)
Thread take-up Slide type
Alternating vertical movement 1〜6.5mm
Dial for adjustment of alternating vertical movement Provided as standard
Amount of thread remaining 5mm＊
＊It varies depending on the sewing conditions.
Needle thread roll-in device Provided as standard
Bottom-feed micro-adjustment mechanism Provided as standard
Hook Vertical-axis double-capacity hook
Needle (at the time of delivery) 135×17 (Nm160) Nm125〜Nm180 or DP×17(#23) #16〜#24
Thread #30〜#5, B46〜B138, Nm=60/3〜20/3
Needle thread tension box Dual-tension method
Pitch changing method By dial
Bobbin thread winder Built on the machine head
Safety mechanism Provided as standard
Automatic reverse feed function Provided as standard
Lubrication Automatic
Lubricating oil JUKI New Defrix Oil No.2 (equivalent to ISO VG32)
Distance from needle to machine arm 255mm
Bed size 517mm×178mm
Weight of the machine head 49.5kg
Compressed air and air consumption 0.5MPa (5kgf/cm2)・0.3N r /min
Power requirement Single-phase 100〜120V, 220〜240V
3-phase 200〜220V, 220〜240V
Please note when placing orders, that the model name should be written as follows:
●To order, please contact your nearest JUKI distributor.
Specification Code
Gauge for Standard 0
Gauge for LU-2200 1
PSC box Code
For General Single-phase 220〜240V
07
Export 3-phase 200〜220V
11
For JUS(LA)
＊
Single-phase 110〜120V 37
3-phase 220〜240V 38
For EU (CE) Single-phase 220〜240V 34
Operation panel Code
Not provided 00000
Operation panel display language: English.
Instruction manual comes in E500B
three different languages.
Operation panel display language: English.
Instruction manual comes in E500C
five different languages.
Pneumatic auto-lifter Code
Pedal switch type
(AK124B)
B
DL device Code
Not provided Z
Provided A
Option Code
Not provided Z
AE-10 (Bobbin thread remaining
amount detecting device)
A
＊ JUS: North America and Central and South America.
Motor Code
For General Single-phase
Export 3-phase 200〜240V
60
For JUS(LA)
＊
Single-phase 100〜120V 61
3-phase 200〜240V 62
For EU (CE) Single-phase 200〜240V 63
SPECIFICATIONS
MARKETING & SALES H.Q.
✽ 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.
✽ This catalog is printed on recycle paper.
AUGUST, 2002 Printed in Japan(AD)
8-2-1 , KOKURYO-CHO, CHOFU-SHI, 
TOKYO 182-8655 , JAPAN
PHONE :
(81)3-3480-2357, 2358

FAX :
(81)3-3430-4909, 4914

http://www.juki.com
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➀the technological and technical research, the development and
design of the products in which the environmental impact is
considered,
➁the conservation of the energy and resources, and the recycling,
in the research, development, design, distribution, sale and
maintenance service of the industrial sewing machines,
household sewing machines and industrial-use robots, etc.and
in the purchase, distribution and sale of the household
commodities including the healthcare products.
HEAD OFFICE
EMS Accreditation
RE005 089
ISO14001:1996
REG.NO.JSAE389