JUKI DNU-1541S User Manual

xxxvii
CONTENTS
BEFORE OPERATION .....................................................................................................................................1
SPECIFICATIONS .............................................................................................................................................4
1. INSTALLATION .........................................................................................................................................8
2. ADJUSTING THE BELT TENSION ......................................................................................................... 11
3. ATTACHING THE BELT COVER .............................................................................................................12
4. INSTALLING THE THREAD STAND .......................................................................................................14
5. LUBRICATION .........................................................................................................................................15
6. ATTACHING THE NEEDLE .....................................................................................................................18
7. THREADING THE BOBBIN THREAD .....................................................................................................19
8. ATTACHING AND REMOVING THE BOBBIN CASE .............................................................................20
9. INSTALLING THE BOBBIN WINDER THREAD GUIDE .........................................................................21
10. WINDING A BOBBIN ...............................................................................................................................22
11. THREADING THE MACHINE HEAD .......................................................................................................23
12. ADJUSTING THE STITCH LENGTH .......................................................................................................25
13. THREAD TENSION .................................................................................................................................26
14. THREAD TAKE-UP SPRING ...................................................................................................................28
15. HAND LIFTER .........................................................................................................................................29
16. ADJUSTING THE PRESSURE OF THE PRESSER FOOT ....................................................................30
17. NEEDLE-TO-HOOK RELATION ..............................................................................................................31
18. ADJUSTING THE OPENER (DNU-1541S) .............................................................................................34
19. ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT AND THE WALKING FOOT............36
20. SEWING SPEED TABLE .........................................................................................................................39
21. MOTOR PULLEY AND V BELT ...............................................................................................................41
22. RESETTING THE SAFETY CLUTCH (DNU-1541S) ...............................................................................43
23. TROUBLES IN SEWING AND CORRECTIVE MEASURES ...................................................................46
Edit: This manual was created from the official 7-language, 96-page manual (downloaded from Juki Mar-2024).
Non-english languages have been removed (now 28 pages). Original page numbers are retained for easy reference
to the original.
BEFORE OPERATION
• Before you put the machine into operation for the first time after the set-up, clean it thoroughly .
Remove all dust gathering during transportation and oil it well.
• Confirm that voltage has been correctly set.
Confirm that the power plug has been properly connected to the power supply.
• Never use the machine in the state where the voltage type is different from the designated one.
• The direction of normal rotation of the machine is counterclockwise as observed from the pulley side.
Take care not to allow the machine to rotate in the reverse direction.
• Never operate the machine unless the machine head and the oil tank have been filled with oil.
• For a test run, remove the bobbin and the needle thread.
• For the first month, decrease the sewing speed and run DNU-1541 and -1541S at a speed of 2,000 sti/min
or less, and DNU-1541H at a speed of 1,600 sti/min or less.
• Operate the handwheel after the machine has totally stopped.
CAUTION :
Check the following so as to prevent maloperation of and damage to the machine.
– 1 –

JUKI DNU-1541S Specifications

General

Machine Type	Single Needle Lockstitch
Max Stitch Length	9 mm
Presser Foot Lift by Hand	9 mm
Presser Foot Lift by Knee	16 mm
Lubrication	Automatic
Max Sewing Speed	2500 stitches per minute
Hook	Full Rotary Hook
Bed Size	477mm(L)×177mm(W)