CONTENTS
1. OUTLINE ........................................................................................................... 1
(1) Features ............................................................................................................................ 1
(2) Specifications .................................................................................................................... 1
(3)Application .......................................................................................................................... 1
2. OPERATION...................................................................................................... 2
(1) Names of each components .............................................................................................. 2
(2) Matters to be checked before operation and trial run ........................................................ 2
3. THREAD TRIMMING ......................................................................................... 3
(1) Principle of thread trimming............................................................................................... 3
(2) Sequence of thread trimming ............................................................................................ 3
4. STANDARD ADJUSTMENT ............................................................................. 4
(1) Adjusting the height of the needle bar ............................................................................... 4
(2) Hook timing........................................................................................................................ 4
(3) Adjusting the needle stop position ..................................................................................... 6
(4) Checking and adjusting the receding position of the moving knife .................................... 8
(5) Removing/installing the knife unit .................................................................................... 10
(6) Checking and adjusting the thread trimmer cam timing .................................................. 12
(7) Installing the counter knife ............................................................................................... 14
(8) Replacing the moving knife ............................................................................................. 14
(9) Disk rising amount of the thread tension controller (asm.) .............................................. 16
(10) Adjusting the clutch plate and the thread trimmer magnet ............................................ 16
(11) Adjusting the driving arm stopper .................................................................................. 18
(12) Replacing the synchronizer and adjusting the position of the handwheel ..................... 18
(13) Adjusting and assembling the needle feed adjustment mechanism .............................. 20
(14) Adjusting and assembling the needle feed mechanism ................................................ 22
(15) Assembling the reduction gear ...................................................................................... 24
(16) Adjusting the belt tension .............................................................................................. 26
(17) Removing/installing the oil reservoir.............................................................................. 26
(18) Adjusting the position of the hemming binder cylinder .................................................. 28
(19) Installing the presser .....................................................................................................28
(20) Bobbin case ................................................................................................................... 30
(21) Adjusting sewing............................................................................................................ 32
5. SETTING OF SC-380 ...................................................................................... 34
6. MAINTENANCE............................................................................................... 36
(1) How to sharpen the knife ................................................................................................. 36
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