Tabla De Contenido - Brother TN-841A Manual De Instrucciones

1. NAMES OF MAJOR PARTS
2. MACHINE SPECIFICATIONS
3. OPTIONAL PARTS
.................................................. 6
4. WORK TABLE AND MOTOR
5. INSTALLATION
........................................................ 11
5-1. Installing the oil pan ........................................... 12
5-2. Installing the machine head ............................... 13
5-3. Installing the knee lifter assembly ..................... 14
5-4. Installing the belt ................................................. 16
5-5. Installing the bobbin winder .............................. 16
5-6. Installing the belt cover ...................................... 17
5-7. Installing the cotton stand .................................. 18
5-8. Lubrication ............................................................ 19
5-9. Checking the machine pulley rotating
direction ................................................................ 21
6. PREPARATION BEFORE SEWING
6-1. Installing the needle ............................................ 22
6-2. Removing the bobbin or cap ............................. 23
6-3. Winding the lower thread ................................... 24
6-4. Installing the bobbin or cap ............................... 26
6-4-1. Installing the bobbin
[841A, 842A, 847A, 872A] ........................... 26
6-4-2. Installing the cap [845A, 848A, 875A] ........ 27
6-5. Threading the upper thread ............................... 29
6-6. Adjusting the stitch length ................................. 31
6-7. Corner sewing method [845A, 848A, 875A] ..... 33
6-7-1. To stop the needle bars (right and left) .... 33
6-7-2. Number of stitches: quick-reference
guide ............................................................. 34
7. SEWING
..................................................................... 35
7-1. Sewing .................................................................. 36
7-2. Backtacking
[842A, 845A, 847A, 848A, 872A, 875A] .............. 36
8. THREAD TENSION
.................................................. 37
8-1. Adjusting the thread tension .............................. 37
8-2. Adjusting the presser foot pressure .................. 38
From the library of: Superior Sewing Machine & Supply LLC
CONTENTS
................................. 1
................................. 3
................................ 9
...................... 22
- xi -
9. SWITCHING BETWEEN UPPER FEED AND
LOWER FEED [842A-02F, 03F]
10. CLEANING
................................................................ 45
11. STANDARD ADJUSTMENTS
11-1. Adjusting of the feed dog height ...................... 49
11-2. Adjusting the presser foot height ...................... 50
11-3. Adjusting the thread tension spring .................. 51
11-4. Adjusting the needle and rotary hook timing .. 53
11-4-1. Needle to rotary hook point gap ............... 53
11-4-2. Clearances between rotary hooks
and needle plate .......................................... 54
11-4-3. Clearance between rotary hook and
opener ........................................................... 55
11-4-4. Needle bar height and lift amount ............ 56
11-5. Adjusting the rotary hook lubrication amount . 61
11-6. Adjusting of the needles and feed timing ........ 63
12. REPLACING GAUGE PARTS (CHANGING THE
NEEDLE WIDTH)
..................................................... 64
13. INSTALLING OPTIONAL PARTS
13-1. Replacing the rotary hook .................................. 70
13-2. Replacing the upper thread tension
assembly .............................................................. 74
14. TROUBLESHOOTING GUIDE
............................ 41
............................... 48
......................... 69
............................... 75
TN-8400, 8700
TL-8400