JUKI LU-2828V-7 User manual

LU-2828V-7
INSTRUCTION MANUAL

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CONTENTS
1. SPECIFICATIONS................................................................................................. 1
1-1. Specications of the sewing machine head ............................................................................1
1-2. Specications of the control box..............................................................................................1
2. INSTALLATION.....................................................................................................2
2-1. Mounting positions of the devices and table...........................................................................2
2-2. Installation of the sewing machine...........................................................................................3
2-3. Installing the oil shield...............................................................................................................5
2-4. Pneumatic components (Only for the models provided with the stitch skipping
detecting device and bobbin-thread remaining amount detecting device).........................6
2-5. Installing the thread stand.........................................................................................................8
2-6. Installing the thread guide pin ..................................................................................................8
2-7. Installing the handwheel cover (only in the case the protection cover sensor is
provided)....................................................................................................................................9
2-8. Installing the electrical box .....................................................................................................10
2-8-1. Preparing for installation of the control box.................................................................... 10
2-8-2. Installing the electrical box................................................................................................ 10
2-9. Installing the pedal sensor ......................................................................................................10
2-10. Installing the reactor box (Only for the EU type models) ...................................................11
2-11. Installing the control box for stitch skipping detecting device (only for the models
provided with the stitch skipping detecting device and the bobbin-thread remaining
amount detecting device).......................................................................................................12
2-12. Installing the accessory ring core (Only for the EU type models).....................................12
2-12-1. Installing the accessory ring core supplied with the electrical box ............................ 12
2-13. Connecting the power switch cable .....................................................................................12
2-13-1. Installing the power switch.............................................................................................. 12
2-13-2. Connecting the power source cord ................................................................................ 13
2-14. Connecting the cords.............................................................................................................14
2-14-1. Connecting the cords coming from the sewing machine............................................. 14
2-14-2. Connection of the cords coming from the stitch skipping detecting device,
bobbin-thread remaining amount detecting device and cover sensor........................... 15
2-15 Handling the cords..................................................................................................................18
2-15-1. Handling the cords coming from the control box ......................................................... 18
2-15-2. Handling the cords coming from the control box for stitch skipping detecting
device....................................................................................................................................18
2-16. Attaching the connecting rod................................................................................................19
2-17. Adjustment of the pedal.........................................................................................................20
2-17-1. Installing the connecting rod........................................................................................... 20
2-17-2. Adjusting the pedal angle ................................................................................................20
2-18. Pedal operation.......................................................................................................................20
2-19. Lubrication..............................................................................................................................21
2-20. How to use the operation panel (Basic explanation) ..........................................................22
2-20-1. Selection of the language (operation to be done at rst) ............................................. 22
2-20-2. Names and functions of the panel keys ......................................................................... 24
2-20-3. Basic operation.................................................................................................................25
3. PREPARATION BEFORE SEWING ...................................................................26
3-1. Attaching the needle ................................................................................................................26

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3-2. Attaching and removing the bobbin .......................................................................................26
3-3. Threading the hook ..................................................................................................................27
3-4. Winding a bobbin .....................................................................................................................27
3-5. Threading the machine head...................................................................................................29
3-6. Installing the attachment .........................................................................................................30
4. ADJUSTING THE SEWING MACHINE ..............................................................31
4-1. Thread tension..........................................................................................................................31
4-1-1. Adjusting the tension of thread tension controller No. 1................................................ 31
4-1-2. Adjusting the needle thread tension (Active tension)..................................................... 31
4-1-3. Adjusting the bobbin thread tension ................................................................................ 31
4-2. Thread take-up spring..............................................................................................................32
4-2-1. When you want to change the stroke of the thread take-up spring............................... 32
4-2-2. When you want to change the tension of the thread take-up spring............................. 32
4-3. Presser foot (Active presser device) ......................................................................................33
4-3-1. Presser foot pressure......................................................................................................... 33
4-3-2. Micro-lifter function ............................................................................................................33
4-4. Adjusting the stitch length ......................................................................................................34
4-5. Changing the sewing speed....................................................................................................34
4-6. Adjusting the alternating vertical movement amount...........................................................35
4-7. Thread trimming and condensation stitching function ........................................................36
4-8. LED hand light ..........................................................................................................................38
4-9. Reverse feed stitching .............................................................................................................38
4-10. Jog dial....................................................................................................................................38
4-11. Custom switch ........................................................................................................................39
4-12. Adjusting the oil quantity in the hook ..................................................................................42
5. OPERATION OF THE SEWING MACHINE........................................................ 43
5-1. Resetting the safety clutch......................................................................................................43
5-2. Lifting the presser foot at an emergency...............................................................................43
5-3. Power lamp ...............................................................................................................................44
5-4. Knee switch...............................................................................................................................45
6. HOW TO USE THE OPERATION PANEL .......................................................... 46
6-1. Explanation of the sewing screen (when selecting a sewing pattern)................................46
6-2. Sewing patterns........................................................................................................................50
6-2-1. Sewing pattern conguration ............................................................................................50
6-2-2. List of sewing patterns....................................................................................................... 51
6-2-3. Reverse feed stitching (at start) pattern........................................................................... 53
6-2-4. Reverse feed stitching (at end) pattern ............................................................................ 60
6-2-5. Editing the sewing patterns...............................................................................................61
6-2-6. List of pattern functions..................................................................................................... 66
6-2-7. Teaching function ............................................................................................................... 73
6-2-8. One-touch utility changeover function............................................................................. 75
6-2-9. Registration of a new sewing pattern ............................................................................... 76
6-2-10. Copying a pattern .............................................................................................................78
6-2-11. Narrow-down function......................................................................................................79
6-3. Counter function.......................................................................................................................81
6-3-1. Displaying the sewing screen under the counter display mode.................................... 81
6-3-2. Types of the counter........................................................................................................... 81
6-3-3. How to set the counter .......................................................................................................82
6-3-4. How to reset the count-completion state ......................................................................... 85

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6-4. Simplied chart of panel displays ..........................................................................................86
6-5. List of memory switch data .....................................................................................................87
6-6. List of errors .............................................................................................................................92
6-7. Memory switch data .................................................................................................................96
7. CARE ..................................................................................................................98
7-1. Standby mode...........................................................................................................................98
7-2. Cleaning ....................................................................................................................................99
7-3. Applying grease........................................................................................................................99
7-4. Replacing the fuse..................................................................................................................100
7-5. Disposal of batteries ..............................................................................................................100
8. ADJUSTMENT OF THE MACHINE HEAD (APPLICATION) ...........................101
8-1. Needle-to-hook relation .........................................................................................................101
8-2. Adjusting the timing between the needle and the blade point of hook.............................102
8-3. Adjusting the hook needle guard..........................................................................................103
8-4. Adjusting the bobbin case opening lever ............................................................................103
8-5. Adjusting the moving knife, the counter knife and the bobbin thread clamp ..................104
8-6. Adjusting the thread trimming cam timing ..........................................................................106
8-7. Adjusting the thread clamp device .......................................................................................107
8-8. Active-presser multi-layered section detection function ...................................................110
8-8-1. Multi-layered section detection function........................................................................ 110
8-8-2. Turning OFF the multi-layered section changeover function by the number of
stitching .............................................................................................................................. 113
8-9. Grease shortage alarm ..........................................................................................................115
8-9-1. Regarding the grease shortage alarm ............................................................................ 115
8-9-2. E221 Grease-shortage error ............................................................................................ 115
8-9-3. Regarding K118 error resetting procedure .................................................................... 116
9. HOW TO USE THE OPERATION PANEL (APPLICATION)............................. 117
9-1. Management of sewing patterns...........................................................................................117
9-1-1. Creation of a new pattern................................................................................................. 117
9-1-2. Copying a pattern ............................................................................................................. 119
9-1-3. Deleting a pattern ............................................................................................................. 120
9-2. Setting up the polygonal-shape stitching............................................................................121
9-2-1. Editing a polygonal-shape stitching pattern.................................................................. 121
9-2-2. Creating a new polygonal-shape stitching pattern ....................................................... 127
9-2-3. Setting the step from which polygonal-shape stitching is started .............................. 127
9-3. Cycle pattern...........................................................................................................................128
9-3-1. Selecting the cycle pattern ..............................................................................................128
9-3-2. Editing cycle sewing data ............................................................................................... 129
9-3-3. Creating a new cycle pattern ........................................................................................... 130
9-3-4. Setting the step from which cycle sewing pattern is started ....................................... 132
9-4. Custom pitch...........................................................................................................................133
9-4-1. Selecting a custom pitch ................................................................................................. 133
9-4-2. Creating a new custom pitch...........................................................................................135
9-4-3. Custom pitch edit function ..............................................................................................138
9-4-4. Copying/deleting a custom pitch .................................................................................... 139
9-5. Condensation custom pattern...............................................................................................140
9-5-1. Selecting the condensation custom ............................................................................... 140
9-5-2. Creating a new condensation custom ............................................................................ 140
9-5-3. Condensation custom edit function ............................................................................... 143

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9-5-4. Copying/deleting a condensation custom ..................................................................... 144
9-6. Simple lock of the screen ......................................................................................................145
9-7. Version information................................................................................................................145
9-8. Adjustment of brightness of the LED panel.........................................................................146
9-9. Information..............................................................................................................................147
9-9-1. Data communication ........................................................................................................ 147
9-9-2. USB ....................................................................................................................................150
9-9-3. NFC ....................................................................................................................................151
9-10. Key customization................................................................................................................152
9-10-1. Assignable data .............................................................................................................. 152
9-10-2. How to assign a function to a key................................................................................. 153
9-11. Maintenance management function....................................................................................155
9-12. Setting the ancillary devices ...............................................................................................159
9-12-1. Setting the ON/OFF status of suspended ruler............................................................ 160
9-12-2. Setting the ON/OFF status of stitch skipping detecting device ................................. 160
9-12-3. Setting the ON/OFF status of bobbin-thread remaining amount detecting device .. 161
9-12-4. Setting the ON/OFF status of cover sensor device ..................................................... 161
10. SEWING SPEED TABLE ................................................................................163
11. TROUBLES IN SEWING AND CORRECTIVE MEASURES .......................... 164

– 1 –
Item Application
Model LU-2828V-7
Sewing speed Max. 3,500 sti/min
(See "10. SEWING SPEED TABLE" p.163.)
Stitch length Max. 9 mm
Needle SCHMETZ 134-35 (Nm 125 to Nm 180) (Standard : Nm 140)
Applicable thread size for sewing #30 to #5 (US: #46 to #138, Europe: 60/3 to 20/3)
Applicable thread size to be cut #30 to #5 (US: #46 to #138, Europe: 60/3 to 20/3)
Motor AC servo motor
Presser foot pressure control Electronic control
Horizontal feed control Electronic control
Alternate vertical feed control Electronic control
Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7)
or JUKI MACHINE OIL No. 7
Number of patterns Sewing pattern ............................99 patterns (For the polygonal shape sewing,
as many as 10 patterns can be registered.)
Cycle sewing pattern ................... 9 patterns
Custom-pitch pattern ...................20 patterns
Condensation custom pattern .....9 patterns
Noise -Equivalent continuous emission sound pressure level (LpA) at the
workstation:
A-weighted value of 88.0 dB; (Includes KpA = 2.5 dB); according to ISO
10821- C.6.2 - ISO 11204 GR2 at 3,500 sti/min.
-Sound power level (LWA);
A-weighted value of 92.5 dB; (Includes KWA = 2.5 dB); according to ISO
10821- C.6.2 - ISO 3744 GR2 at 3,500 sti/min.
1. SPECIFICATIONS
1-1. Specications of the sewing machine head
1-2. Specications of the control box
Supply
voltage
Single phase
100 to 120V
3-phase
200 to 240V
Single phase
220 to 240V
Single phase
220 to 240V CE
Frequency 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz
Operating
environment
Temperature : 0 to 35˚C
Humidity : 90% or less
Temperature : 0 to 35˚C
Humidity : 90% or less
Temperature : 0 to 35˚C
Humidity : 90% or less
Temperature : 0 to 35˚C
Humidity : 90% or less
Input 600VA 600VA 600VA 600VA
LU-2828V-7-NB-B-S-
Classication of options
Z Not provided
F Protective cover sensor
Stitch skipping detecting device
Bobbin-thread remaining amount detecting device

– 2 –
2. INSTALLATION
2-1. Mounting positions of the devices and table
The devices including the oil pan and electrical box are to be mounted to the positions as shown in the gure
below.
❶Control box
❷Power switch
❸Oil pan
❹Pedal sensor
❺*2 Control box for stitch skipping detecting device
❻*2 Solenoid valve
❼*2 Regulator
❽*1 Reactor box
❾*2 DIN rail
*1: Only for the EU type models
*2: Only for the models provided with the stitch skipping detecting device and bobbin-thread remaining amount
detecting device
* Dimensions are the reference values.
Dimension: mm
❶
❷❸❹
❺*2 ❻*2
❼*2
❽*1
40
38
30 220
105
145
352
80
175
650
62
513
58
94
110
55
❾*2

– 3 –
2-2. Installation of the sewing machine
1) To prevent possible accidents caused by the full
of the sewing machine, perform the work by two
persons or more when the machine is moved.
2) Place the sewing machine on a horizontal and
plane place when placing it and do not place
any protruding thing such as a screwdriver or
the like.
Never hold the handwheel since it rotates.
3) Attaching the hinge seats and the support rub-
bers of the machine head
Fix accessory hinge seat ❶supplied with the
unit on the table with wood screw ❼and wash-
er ❽while placing sheet plate ❻between the
hinge seat and the table as shown in the gure.
Fix machine head support rubbers ❷and ❸on
the table with nails while putting sheets A(stan-
dard: 3 pieces) and sheet B(standard: 1 piece)
under the machine head support rubbers.
Use nail ❺for sheet Band nail ❹for sheets A.
There are two di󰀨erent machine head support
rubbers ❸; i.e., the rubber for the right and that
for the left. Be sure to check the types of the
support rubbers before xing them.
Sheet A (eight pieces) and sheet B (four pieces) are supplied with the machine as accessories.
For the sheet A, three sheets are to be used as standard for each mounting position. For the sheet B,
one sheet is to be used as standard. (The state shown in the left gure)
The sheets A and B are used for adjusting the height of the top surface of the bed. Use one more
sheet to increase the height, or use only one sheet to decrease it.
Be sure to use a short nail ❺ for sheet B. If long nail ❹ is used, the nail tip can penetrate the table
giving rise to a risk of injury.
❹
25 mm
❺
19 mm
❷
❹
❸
❸
❺❺
❻
❼
❶
❽
Sheet B
Sheet A

– 4 –
6) Install hinge 󱢴on the bed with screw 󱢵. En-
gage the hinge with the rubber hinge of the
table. Then, place the machine head on the
machine head support rubber.
󱢴
󱢵
5) Attach a lter 󱢳to the oil pan ❾as shown in
the gure.
Install lter 󱢳so that its multi-layered part is
brought to the right side as observed from you.
Multi-layered part
❾
󱢳
Top surface
4) Attaching the oil pan
Fix the oil pan ❾supplied with the machine on
the table by tightening ten wood screws.
Operator’s side Table
❾
Align
Align

– 5 –
8) Put reux pipe 󱢷in the oil reservoir Aof oil
pan ❾. Secure the pipe in groove 󱢸.
9) Fix lter 󱢹 and lter clamp 󱢺 with tting 󱢻.
7) Securely attach head support rod 󱢶until its rib
is closely pressed against the table.
When it is really necessary to conduct work
with the machine head supporting rod re-
moved for the purpose of maintenance and
repair, it is necessary to carry out the work
with two or more persons.
In the case the machine head is tilted more
than necessary, oil can leak from the oil in-
let of the oil tank. It is, therefore, necessary
to remove oil from the oil tank before tilting
the machine head.
Install oil shield ❶, supplied with the unit, on the
frame with screws ❷.
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 o󰀨 and ascertaining that the motor is at rest.
❷
❶
❷
2-3. Installing the oil shield
Secure the reux pipe 󱢷 as illustrated in the
gure.
󱢶
❾
󱢷
󱢸󱢹
󱢺
󱢻
A