JUKI LK1903B/BSS302 User manual

LK-1903B/BR35
INSTRUCTION MANUAL

CONTENTS
I. SPECIFICATIONS......................................................................................................................1
1. Specications ................................................................................................................................................ 1
2. Modelclassicationaccordingtothebuttonsize ..................................................................................... 2
3. Shapeofbuttons ........................................................................................................................................... 2
II. NAME OF EACH COMPONENT ..............................................................................................3
III. INSTALLATION OF THE SEWING MACHINE AND PREPARATION OF THE OPERATION 4
1. Installationofthetableandstand ............................................................................................................... 4
2. Needleandthread ......................................................................................................................................... 4
3. Attachingtheneedle ..................................................................................................................................... 4
4. Threadingthemachine ................................................................................................................................. 5
IV. OPERATION ............................................................................................................................6
1. Operationofthesewingmachine ................................................................................................................ 6
2. Varioussewingmodes.................................................................................................................................. 6
3. Operationofthebuttonfeederunit ............................................................................................................. 8
4. Operation...................................................................................................................................................... 10
5. HowtosettheDIPswitchesandthedigitalswitches ............................................................................. 10
V. MAINTENANCE......................................................................................................................16
1. Tiltingthesewingmachinehead ............................................................................................................... 16
2. Positionofthebuttonclampjawlever...................................................................................................... 17
3. Adjustingthefeedplate.............................................................................................................................. 18
4. Adjustingthebuttonclampjawlever........................................................................................................ 18
5. Adjustingtheliftingamountofthebuttonclamp .................................................................................... 19
6. Adjustmentofthepressureoftheworkclampunit................................................................................. 20
7. Adjustmentofthewiper.............................................................................................................................. 20
8. Adjustmentofthewiperspring.................................................................................................................. 20
9. Installingthesavebuttonbar(accessorypart)........................................................................................ 21
10. Adjustmentofthebuttonfeederunitcontrolbox .................................................................................... 21
11. Detectingmechanismofthebuttonfeedercomponentsandtheadjustment ...................................... 22
12. Adjustingthefeedplateoftheindexunit ................................................................................................. 23
13. Replacingthebuttonfeedercomponentsandpositioningthem ........................................................... 24
14. Adjustingthevibrationofthebuttonfeeder............................................................................................. 25
15. Adjustingthefeederbowlcomponents .................................................................................................... 25
16. Howtoreplacethebuttons(onthebuttonfeederside) .......................................................................... 28
VI.ALARMNO.INDICATION(onthebuttonfeederunit(BR)side).......................................30
VII. TROUBLES AND CORRECTIVE MEASURES IN BR.........................................................31
VIII. OPTIONAL PARTS..............................................................................................................32
1. Kindsofthebuttoncarrier ......................................................................................................................... 32
2. Attachment................................................................................................................................................... 33
3. Others ........................................................................................................................................................... 34

−1 −
I. SPECIFICATIONS
Different specications from those of the LK-1900B only are described.
1.Specications
1 Sewing speed Max. 2,700 sti/min (Normal speed : 2,500 sti/min)
2 Needle bar stroke 45.7 mm
3 Needle DPX17 #14
4 Lifting lever method Joint use of stepping motor and cam (BR side)
5 Lifting amount of button clamp Max. 11 mm
6 Number of standard patterns 50 kinds
7 Sewing speed limit Can be limited freely to 400 to 2,700 sti/min.
(adjustable in a unit of 100 sti/min)
8 Buttons used Type : Round-shaped at buttons (4-holed, 2-holed)
Size : ø10 mm to ø18 mm
(Note) 1. Forbuttonsofwhichdiameterisø16mmormore,thestan-
dardfeedplateisrequiredtobereplacedwiththefeedplate
22Basm.
     2. Forbuttons ofwhich diameteris ø16 mmor more, usethe
buttonclampjawleverforlargebuttons.
Thickness : 1.8 to 3.5 mm
9 Selection of buttons to be fed By vibration system using a piezoelectric feeder
10 Button setting Buttons are loaded from the rear. (Manual loading possible)
11 Button feeding method Horizontal forced feed mechanism
12 Detection of a failure of feeding buttons Provided with two detectors
• One detector detects a button at the section where the button is cor-
rectly positioned.
• Another detector checks whether the button is correctly inserted into
the carrier pin.
13 Driving source for the feeder DC motor (24 Vdc)
14 Automatic button discharging function Provided
15 Independent operation Possible
of the sewing machine
16 Small-lot sewing function Provided
17 Time required to feed a button 0.5 sec/pc.
18 Outer dimension W : 1,200 mm L : 660 mm H : 1,155 mm
(Standard table and stand used)
19 Weight 135 kg (including optional table/stand)
20 Power uctuation Rated value ±10 % 50/60 Hz
21 Power consumption 350 W
22 Noise - Equivalent continuous emission sound pressure level (LpA) at the workstation :
A-weighted value of 81.0 dB; (Includes KpA = 2.5 dB); according to ISO
10821- C.6.3 -ISO 11204 GR2 at 2,700 sti/min for the sewing cycle, 1.8s
ON (Pattern : No.4).
- Sound power level (LWA) ;
A-weighted value of 83.5 dB; (Includes KWA = 2.5 dB); according to ISO
10821- C.6.3 -ISO 3744 GR2 at 2,700 sti/min for the sewing cycle, 1.8s
ON (Pattern : No.4).

− 2 −
2.Modelclassicationaccordingtothebuttonsize
3.Shapeofbuttons
Shape of buttons
Applicable buttons Non-applicable buttons
Thickness of button : 1.8 to 3.5 mm Button of which edge is thin is likely not to be fed smoothly.Remarks
Model
Button size classication
Outside diameter of applicable buttons (mm)
Length
Width
Thickness (mm)
Right
Left
Needle hole guide
Feed plate
LK-1903B-311
For small-sized buttons
ø10 - ø15
0 - 3.5
0 - 3.5
2.2 Engraved mark
MAZ165070B0 H
MAZ165080B0 H
MAZ15501000
MAZ15502000
LK-1903B-312
For medium-sized buttons
ø12 - ø18
0 - 4.5
0 - 4.5
2.7 Engraved mark
MAZ166070B0 J
MAZ166080B0 J
MAZ15601000
MAZ15602000
Sewing size (mm)
Button clamp jaw
lever Part No.
Lessthan1.2mm
Buttonwithoutrecessonthesurface
1.2mmormore
1.8 –
3.5mm

−3 −
II. NAME OF EACH COMPONENT
This machine is composed of the following components.
Buttonclampunit
Sewingmachinehead
Butonfeeder
Threadstand
Sewingmachine
Partsfeedercontroller
(ForEurope)
Buttonfeederunit(BR)controlbox
Powerswitch
Sewingmachine
controlbox
Footpedal
Spinneroscillating
armmotorknob
Buttonloaderunit
Table
Buttonfeederunit(BR)controlpanel
Powerswitch
(EUtype)