4 - 1
4
Adjustment
Test Mode Test mode............................................... 4 - 2
Adjustment Timing belt tension adjustment ............... 4 - 3
Motor belt tension adjustment................. 4 - 4
Upper thread tension adjustment............ 4 - 5
Three point needle drop adjustment ....... 4 - 6
Needle drop position adjustment for needle bar unit and rotary hook unit
4 - 7
Needle interference left/right adjustment 4 - 8
Needle bar rise adjustment ..................... 4 - 9
Needle bar height adjustment ............... 4 - 10
Needle interference adjustment............ 4 - 11
Adjust the needle thread block.............. 4 - 12
Presser bar height and parallel adjustment
. 4 - 13
Inner rotary hook (bobbin thread) tension
4 - 14
Feed forward/reverse adjustment ......... 4 - 15
Bobbin winder (uneven bobbin winding and bobbin winding amounts) adjustment
4 - 16
BH lever switch position adjustment ..... 4 - 17
Forward and back adjustment of needle and presser.
. 4 - 18
Feed dog forward/reverse and left/right adjustment
4 - 19
Feed dog height adjustment ................. 4 - 20
Inner rotary hook bracket position adjustment
. 4 - 21
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