5
7. Standard adjustments of the sewing machine
..........................................
21
1) Needle used ........................................................................................................................ 21
2) Installation of needle .......................................................................................................... 21
3) Threading ............................................................................................................................ 22
4) Adjustment of thread tension ............................................................................................. 22
5) Adjustment of presser foot tension .................................................................................... 23
6) Adjustment of presser foot position .................................................................................. 23
7) Adjustment of stitch length ............................................................................................... 23
8) Adjustment of differential feed .......................................................................................... 25
9) Lubricating device of needle thread and needle cooling device ....................................... 26
8. Fine-tuning of the sewing machine
...................................................................
27
1) Adjustment of needle thread tension ................................................................................. 27
2) Adjustment of looper thread tension ................................................................................. 29
3) Adjustment of needle and spreader ................................................................................... 29
4) Adjustment of needle and looper timing ........................................................................... 31
5) Adjusting the feed dog height ............................................................................................ 32
6) Adjusting needle and needle plate ..................................................................................... 32
7) Presser foot separation and lift volume ............................................................................. 36
9. Automatic Thread Trimmer
...................................................................................
37
1) Operation ............................................................................................................................. 37
2) Wiring .................................................................................................................................. 39
3) Air pressure wiring map .................................................................................................... 44
4) Installation of synchronizer sensor..................................................................................... 47
5) Adjustment of automatic thread trimmer ........................................................................... 48
6) Adjustment of thread tension release mechanism ............................................................. 55
7) Adjustment of air wiper ..................................................................................................... 59
8) Presser foot lifter mechanism ............................................................................................ 60
9) ST-C device ......................................................................................................................... 61
