Brother International TN-872B Instruction Manual - English and Spanish - Page 12

Contents, Replacing Gauge Parts Changing

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CONTENTS 1. NAMES OF MAJOR PARTS 1 2. MACHINE SPECIFICATIONS 3 3. OPTIONAL PARTS 8 4. WORK TABLE AND MOTOR 11 5. INSTALLATION 13 5-1. Installing the oil pan 14 5-2. Installing the machine head 15 5-3. Installing the knee lifter assembly 16 5-4. Installing the belt 18 5-5. Installing the bobbin winder 18 5-6. Installing the belt cover 19 5-7. Installing the cotton stand 21 5-8. Ground Wire Connections 21 5-9. Installing the electromagnetic presser bar liter assembly (-900, option 22 5-10. Installing the air equipment (-700 26 5-11. Installing the knee switch (-700, -900, option 28 5-12. Selecting the presser bar lifter function (-700, -900, option 29 5-13. Connection of Wires (-700, -900, Option parts 30 5-14. When not using the knee switch (-900, option 31 5-15. Lubrication 33 5-16. Checking the machine pulley rotating direction 35 6. PREPARATION BEFORE SEWING 36 6-1. Installing the needle 36 6-2. Removing the bobbin or cap 37 6-3. Winding the lower thread 38 6-4. Installing the bobbin or cap 40 6-4-1. Installing the bobbin [842B, 847B, 872B 41 6-4-2. Installing the cap [845B, 848B, 875B] ........ 42 6-5. Threading the upper thread 43 6-6. Adjusting the stitch length 45 6-7. Thread Wiper 46 6-8. Corner sewing method [845B, 848B, 875B] ...... 47 6-8-1. To stop the needle bars (right and left) .... 47 6-8-2. Number of stitches: quick-reference guide 48 7. SEWING 49 7-1. Sewing 50 7-2. Backtacking 50 8. THREAD TENSION 51 8-1. Adjusting the thread tension 51 8-2. Adjusting the presser foot pressure 52 8-3. Adjusting the trailing length after thread trimming 52 9. SWITCHING BETWEEN UPPER FEED AND LOWER FEED [842B-C0F, 845B-C01 55 10. CLEANING 59 11. STANDARD ADJUSTMENTS 62 11-1. Adjusting of the feed dog height 63 11-2. Adjusting the presser foot height 64 11-3. Adjusting the thread tension spring 65 11-4. Adjusting the needle and rotary hook timing .. 67 11-4-1. Needle to rotary hook point gap 67 11-4-2. Clearances between rotary hooks and needle plate 68 11-4-3. Clearance between rotary hook and opener 69 11-4-4. Needle bar height and lift amount 70 11-5. Thread Wiper Adjustment 75 11-6. Movable and Fixed Knife Adjustment 78 11-7. Tension Release 81 11-8. Synchronizer Adjustment 83 11-9. Upper and Lower Shaft Timing Adjustment .... 85 11-10. Adjusting the rotary hook lubrication amount 87 12. REPLACING GAUGE PARTS (CHANGING THE NEEDLE WIDTH 89 13. INSTALLING OPTIONAL PARTS 96 13-1. Replacing the rotary hook 97 13-2. Replacing the upper thread tension assembly 101 14. TROUBLESHOOTING GUIDE 102 TN-840B, 870B TL-840B

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TN-840B, 870B
TL-840B
CONTENTS
1. NAMES OF MAJOR PARTS
.................................
1
2. MACHINE SPECIFICATIONS
.................................
3
3. OPTIONAL PARTS
..................................................
8
4. WORK TABLE AND MOTOR
................................
11
5. INSTALLATION
........................................................
13
5-1.
Installing the oil pan
...........................................
14
5-2.
Installing the machine head
...............................
15
5-3.
Installing the knee lifter assembly
.....................
16
5-4.
Installing the belt
.................................................
18
5-5.
Installing the bobbin winder
..............................
18
5-6.
Installing the belt cover
......................................
19
5-7.
Installing the cotton stand
..................................
21
5-8.
Ground Wire Connections
..................................
21
5-9.
Installing the electromagnetic presser bar liter
assembly (–900, option)
......................................
22
5-10. Installing the air equipment (–700)
..................
26
5-11. Installing the knee switch
(–700, –900, option)
...........................................
28
5-12. Selecting the presser bar lifter function
(–700, –900, option)
...........................................
29
5-13. Connection of Wires
(–700, –900, Option parts)
.................................
30
5-14. When not using the knee switch
(–900, option)
.....................................................
31
5-15. Lubrication
..........................................................
33
5-16. Checking the machine pulley rotating
direction
..............................................................
35
6. PREPARATION BEFORE SEWING
......................
36
6-1.
Installing the needle
............................................
36
6-2.
Removing the bobbin or cap
.............................
37
6-3.
Winding the lower thread
...................................
38
6-4.
Installing the bobbin or cap
...............................
40
6-4-1. Installing the bobbin
[842B, 847B, 872B]
.......................................
41
6-4-2. Installing the cap [845B, 848B, 875B]
........
42
6-5.
Threading the upper thread
...............................
43
6-6.
Adjusting the stitch length
.................................
45
6-7.
Thread Wiper
.......................................................
46
6-8. Corner sewing method [845B, 848B, 875B]
......
47
6-8-1. To stop the needle bars (right and left)
....
47
6-8-2. Number of stitches: quick-reference
guide
.............................................................
48
7. SEWING
.....................................................................
49
7-1. Sewing
..................................................................
50
7-2. Backtacking
...........................................................
50
8. THREAD TENSION
..................................................
51
8-1.
Adjusting the thread tension
..............................
51
8-2.
Adjusting the presser foot pressure
..................
52
8-3.
Adjusting the trailing length after thread
trimming
...............................................................
52
9. SWITCHING BETWEEN UPPER FEED AND
LOWER FEED [842B-C0F, 845B-C01]
.................
55
10. CLEANING
................................................................
59
11. STANDARD ADJUSTMENTS
...............................
62
11-1. Adjusting of the feed dog height
......................
63
11-2. Adjusting the presser foot height
......................
64
11-3. Adjusting the thread tension spring
..................
65
11-4. Adjusting the needle and rotary hook timing ..
67
11-4-1. Needle to rotary hook point gap
...............
67
11-4-2. Clearances between rotary hooks
and needle plate
..........................................
68
11-4-3. Clearance between rotary hook and
opener
...........................................................
69
11-4-4. Needle bar height and lift amount
............
70
11-5. Thread Wiper Adjustment
..................................
75
11-6. Movable and Fixed Knife Adjustment
...............
78
11-7. Tension Release
...................................................
81
11-8. Synchronizer Adjustment
...................................
83
11-9. Upper and Lower Shaft Timing Adjustment
....
85
11-10. Adjusting the rotary hook lubrication
amount
...............................................................
87
12. REPLACING GAUGE PARTS (CHANGING THE
NEEDLE WIDTH)
.....................................................
89
13. INSTALLING OPTIONAL PARTS
.........................
96
13-1. Replacing the rotary hook
..................................
97
13-2. Replacing the upper thread tension
assembly
............................................................
101
14. TROUBLESHOOTING GUIDE
..............................
102