Brother SL-746A, Instruction Manual

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SL-746A, 748A (English)
CONTENTS
1. NAMES OF MAJOR PARTS ....................
0 1
2. MACHINE SPECIFICATIONS
................... 0 2
3. OPTIONAL PARTS (748A) .......................
0 3
4. WORK TABLE
............................................ 0 5
5. MOTOR (746A)
............................................. 0 6
6. INSTALLATION
......................................... 0 7
6-1. Installing the oil pan ............................ 0 8
6-2. Installing the machine head ............... 0 9
6-3. Installing the knee lifter assembly
(746A/748A-10
䡺
, 40
䡺
) ......................... 10
6-4. Installing the belt ................................. 11
6-5. Installing the bobbin winder ............... 12
6-6. Installing the belt cover ....................... 13
6-7. Installing the cotton stand .................. 16
6-8. Ground Wire Connections (746A) ...... 16
6-9. Lubrication ............................................ 17
6-10. Checking the machine pulley
rotating direction .................................. 18
7. PREPARATION BEFORE SEWING
........... 19
7-1. Installing the needle ............................ 19
7-2. Removing the bobbin case ................. 20
7-3. Winding the lower thread ................... 21
7-4. Installing the bobbin case ................... 23
7-5. Threading the upper thread ................ 24
7-6. Adjusting the stitch length .................. 25
7-7. Using the thread wiper
(748A-40
䡺
, 90
䡺
, option) ..................... 26
8. SEWING
......................................................... 27
8-1. Sewing .................................................. 28
8-2. Backtacking ........................................... 28
9. THREAD TENSION
....................................... 29
9-1. Adjusting the thread tension .............. 29
9-2. Adjusting the presser foot
pressure ................................................ 30
9-3. Adjusting the trailing length after
thread trimming (748A) ....................... 30
10.CLEANING
................................................. 33
11.STANDARD ADJUSTMENTS
................... 37
11-1. Adjusting the thread tension
spring .................................................... 38
11-2. Adjusting arm thread guide R ............ 40
11-3. Adjusting the presser foot height ...... 41
11-4. Adjusting the feed dog height ............ 42
11-5. Adjusting the feed dog angle ............. 43
11-6. Adjusting the needle bar height ......... 44
11-7. Adjusting the needle and feed
mechanism timing ............................... 45
11-8. Adjusting the needle and rotary
hook timing ........................................... 47
11-9. Checking the rotary hook and
B-case holder position bracket
clearance ............................................... 48
11-10.Adjusting the upper shaft and
rotary hook lubrication amount ......... 48
11-11.Adjusting the synchronizer (748A) ..... 49
12.REPLACING THE FIXED KNIFE AND
MOVABLE KNIFE (748A) .........................
51
1
2-1. Replacing the fixed knife ..................... 51
12-2. Replacing the movable knife .............. 52
13.TROUBLESHOOTING
................................. 53