T-8421C, 8422C, 8452C, 8722C, 8752C
CONTENTS
1. MACHINE SPECIFICATIONS ..............
1
2. NAMES OF MAJOR PARTS ................
3
3. INSTALLATION....................................
4
3-1. Table processing diagram .............................. 5
3-2. Installation ...................................................... 5
3-3. Lubrication ...................................................... 9
3-4. Connecting the cords...................................... 11
3-4-1. Opening the control box cover ............ 11
3-4-2. Connecting the cords .......................... 11
3-5. Test operation (Operating the treadle) ........... 16
3-6. Adjusting the treadle operation....................... 17
4. PREPARATION BEFORE SEWING.....
18
4-1. Installing the needle........................................... 18
4-2. Removing the bobbin...................................... 19
4-3. Winding the lower thread................................ 20
4-4. Installing the bobbin........................................ 21
4-5. Threading the upper thread............................ 23
4-6. Adjusting the stitch length............................... 25
4-7. Using the knee lifter........................................ 25
4-8. Using the thread wiper
(models with thread trimmer only) .................. 25
4-9. Corner sewing method (T-8452C, 8752C) ..... 26
4-9-1. To stop the needle bars
(right and left) ..................................... 26
4-9-2. Number of stitches: quick-reference
guide ................................................... 26
5. USING THE G50 OPERATION PANEL
(BASIC OPERATIONS) ........................
27
5-1. Names and functions...................................... 27
5-2. Sewing start and end backtack stitches ......... 29
5-3. Sewing continuous backtack stitches............. 30
5-4. Sewing fixed stitches ...................................... 31
5-5. Sewing pleat presser stitches......................... 32
5-6. Using the lower thread counter ...................... 33
6. USING THE G50 OPERATION PANEL
(ADVANCED OPERATIONS)...............
34
6-1. Names and functions ......................................34
6-2. Adjusting the needle up stop position .............35
6-3. LOCK key........................................................36
6-4. Resetting all settings to their defaults .............37
7. USING THE G10 OPERATION PANEL
(BASIC OPERATIONS)........................
38
7-1. Names and functions ......................................38
7-2. Sewing start and end backtack stitches..........39
7-3. Sewing continuous backtack stitches .............40
8. USING THE G10 OPERATION PANEL
(ADVANCED OPERATIONS)...............
41
8-1. Changing the needle stop position .................41
8-2. Slow start ........................................................42
8-3. Correction sewing ...........................................43
8-4. Thread trimming lock
(models with thread trimmer only)...................44
8-5. Setting the maximum sewing speed ...............45
8-6. Adjusting the needle up stop position .............46
8-7. Lock function...................................................47
8-8. Resetting all settings to their defaults .............47
9. SEWING ...............................................
48
9-1. Sewing ............................................................48
9-2. Backtacking.....................................................49
9-3. Sewing condensed stitches ............................50
10. THREAD TENSION ............................
51
10-1. Adjusting the thread tension .........................51
10-2. Adjusting the presser foot pressure ..............52
10-3. Adjusting the presser foot floating amount
(minute lifting amount) ..................................53
10-4. Adjusting the trailing length after thread
trimming (models with thread trimmer only)
......................................................................53
10-5. Adjusting the thread take-up amount............54
