1. NAMES OF MAJOR PARTS ................................ 1
2. MACHINE SPECIFICATIONS .............................. 3
3. WORK TABLE ..................................................... 5
4. MOTOR AND V-BELT .......................................... 6
5. INSTALLATION ................................................... 7
5-1. Rubber cushion ....................................................
9
5-2. Oil pan ..................................................................
9
5-3. Machine head ...................................................... 10
5-4. V-belt .................................................................... 10
5-5. Belt guard ............................................................. 11
5-6. Operation panel (-705) ......................................... 13
5-7. Air unit (-705) ....................................................... 13
5-7-1. Installation ................................................. 13
5-7-2. Adjusting the air pressure ......................... 15
5-8. Cotton stand ......................................................... 16
5-9. Knee lifter (-005) .................................................. 17
5-10. Knee switch (-705) ............................................... 17
5-11. Ground wire connections (-705) ........................... 18
6. LUBRICATION ..................................................... 19
7. CHECKING THE MACHINE PULLEY
ROTATING DIRECTION ...................................... 22
8. ADJUSTING THE NEEDLE STOP POSITION
(-705) ................................................................... 23
9. PREPARATION BEFORE SEWING .................... 27
9-1. Installing the needle ............................................. 27
9-2. Removing the bobbin ........................................... 28
9-3. Winding the lower thread ..................................... 29
9-4. Installing the bobbin ............................................. 31
9-5. Threading the upper thread ................................. 33
9-6. Adjusting the stitch length (-005) ......................... 34
9-7. Adjusting the stitch length (-705) ......................... 35
9-8. Alternating presser foot movement amount ......... 37
9-9. Using the manual switches (-705) ........................ 40
9-10. Using the knee switch (-705) ............................... 42
10.SEWING .............................................................. 43
10-1. Sewing ................................................................. 44
10-2. Backtacking .......................................................... 44
11.THREAD TENSION ............................................. 45
11-1. Adjusting the thread tension ................................ 45
11-2. Adjusting the presser foot pressure ..................... 46
11-3. Adjusting the trailing length after thread trimming
(-705) .................................................................. 47
12.CLEANING .......................................................... 51
12-1. Daily cleaning procedures .................................... 52
12-2. Cleaning the oil filter
(carry out once a month) ...................................... 54
13.STANDARD ADJUSTMENTS ............................. 55
13-1. Adjusting the machine head ................................. 57
13-1-1. Adjusting the thread tension spring ....... 57
13-1-2. Adjusting the feed dog height ................ 58
13-1-3. Adjusting the needle bar height ............. 59
13-1-4. Adjusting the needle and rotary hook
timing ..................................................... 61
13-1-5. Adjusting the needle guard position ...... 65
13-1-6. Adjusting the needle and feed
mechanism timing .................................. 66
13-1-7. Adjusting the opener position and timing .... 68
13-1-8. Adjusting the presser foot height ........... 71
13-1-9. Adjusting the alternating presser foot
movement amount ................................. 73
13-1-10. Adjusting the presser foot timing ........... 75
13-2. Adjusting the thread trimmer (-705) ..................... 76
13-2-1. Adjusting the fixed knife position ........... 76
13-2-2. Adjusting the knife timing position ......... 77
13-2-3. Adjusting the driving knife height ........... 78
13-2-4. Adjusting the driving knife stop
position .................................................. 80
13-2-5. Adjusting the driving knife operating
position .................................................. 81
13-2-6. Adjusting the thread holding spring
position .................................................. 85
13-2-7. Adjusting the thread trimming timing ..... 86
13-2-8. Adjusting the tension release amount ... 87
13-3. Adjusting the rotary hook lubrication
amount ................................................................. 88
13-4. Replacing the timing belt ...................................... 92
14. REPLACING GAUGE PARTS
(CHANGING THE NEEDLE GAUGE) ............... 100
15. INSTALLING THE CONVERSION PARTS SET
(SINGLE NEEDLE TO TWIN NEEDLE) ............ 103
16. SAFETY EQUIPMENT ...................................... 109
17. TROUBLESHOOTING ...................................... 112
17-1. Machine head .................................................... 112
17-2. Thread trimming errors (-705) ........................... 117
LS2-B891, LT2-B892 (English)
CONTENTS
