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Sewing Machine
LK-1900AN
JUKI LK-1900AN User Manual
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– 22 –
(14)
Adjustment of the height of the work clamp foot
Standard adjustment
(15)
Adjustment of the thread trimmer sensor
Standard adjustment
After the completion of origin retrieval in the test mode CP-6 (Start Switch ON), try to press the + key
4
6
to 8 times.
At that time, the thread trimmer sensor is turned ON. (The display
1
at the operation panel [10]
→
[00] )
Max. 17 mm
33
35
Table of Contents
Default Chapter
7
Electrical Components
7
Table of Contents
11
1 Specifications
13
2 Configuration
14
Names of Main Unit
14
Names and Explanation of Switches on the Operation Panel
15
3 Standard Adjustment
16
Main Shaft Connection/Disconnection
16
Adjustment of the Main Shaft Wheel Position
18
Removal of the Main Shaft Motor and Coupling
20
Crank Connecting Rod Connection/Disconnection
22
Crank Balancer Positioning
24
Lower Shaft Backlash Adjustment and Connection/Disconnection
24
Oscillator Gear Positioning
26
Adjustment of Hook Oil Amount
26
Shuttle Connection/Disconnection and Oil Wick Piping
28
Adjustment the Height of the Needle Bar
28
Hook Adjustment
30
Thread Trimmer Cam Position Adjustment and Connection/Disconnection
32
Thread Trimmer and Presser Foot Origin Sensor Adjustment
32
Adjustment of the Height of the Work Clamp Foot
34
Adjustment of the Thread Trimmer Sensor
34
Adjustment of the Moving Knife and Counter Knife Position
36
Adjustment of the Height of the Moving Knife and Counter Knife
36
Inclination of the Blade Point of the Counter Knife
38
Floating Amount of the Thread Tension Disk
38
Second Thread Tension Connection/Disconnection
40
AT Unit Connection/Disconnection
42
Position of the Mechanical Origin
44
Adjustment of the y Origin Sensor
44
Adjustment of the X Origin Sensor
46
Adjustment of the Wiper Position
46
Adjustment of the Wiper Spring (LK-1903AN)
48
Adjustment of the Position of the X Feed Motor and the y Feed Motor (Adjustment of the Backlash of the Driving Gear)
48
Installing the Feed Plate Support Plate
50
Installation of the Feeder Bar Rear Cover
50
Adjustment of the Bobbin Winder Driving Wheel Position
52
Adjustment of the Bobbin Winder Amount
52
Adjustment of the Shuttle Upper Spring Position
54
Shuttle Felt
54
Shape of the Inner Hook Presser
56
Adjustment of the Thread Take-Up Spring
56
Needle Thread Clamp Device Connection/Disconnection
58
Adjustment of the Needle Thread Clamp Sensor
60
Adjustment of the Needle Thread Clamp Notch
62
4 Sub-Class Information
64
Models Classified by Button Sizes (LK-1903AN)
64
Table of Standard Patterns (LK-1903AN)
65
5 Memory Switches
66
Memory Switch Start and Change
66
Table of Memory Switch Functions
67
6 Test Mode
71
Test Mode Start
71
Display Output Test
72
Method of Confirmation According to each Test Program no
73
7 Miscellaneous
78
Various Printed Wiring Boards
78
LK-1900 Data ROM
85
Dipswitch Setting
85
Table of Standard Pattern Specifications
86
Table of Standard Patterns
87
8 Optional Features
89
Connection of PK-57
89
Table of Optional Parts
90
Table of the Work Clamp Foot
92
9 Maintenance
94
Replacing the Fuse
94
200V Voltage Specification Changeover
94
Greasing Parts
95
Parts to Which Grease Is Applied
96
Grease-Up Procedures for the Specified Position
103
10 Error List
104
11 Troubles and Corrective Measures
107
Mechanical Parts
107
Sewing Conditions
109
Electrical Components
118
12 Circuit Diagrams
129
Block Diagram a
129
Power Supply Circuit Diagram a
130
Power Supply Circuit Diagram B
131
Power Supply Circuit Diagram C
132
Servo Motor Circuit Diagram
133
Sensor · Pedal VR Circuit Diagram
134
MAIN · PANEL Board Circuit Diagram
135
Motor · Solenoid Circuit Diagram
136
13 Table Drawings
137
Table Type for Lateral Installation
138
4
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JUKI LK-1900AN Specifications
General
Brand
JUKI
Model
LK-1900AN
Category
Sewing Machine
Language
English
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