4 - 1
4
Adjustment
Inspection Needle curvature ..............................4 - 2
Tip damage to needle.......................4 - 3
Test Mode ..........................................................4 - 4
Main unit adjustments
Motor belt tension adjustment ..........4 - 5
Needle-presser module and feed module
left-right position alignment...............4 - 6
Timing belt tension adjustment.........4 - 7
Needle bar rise adjustment...............4 - 8
Needle bar height adjustment...........4 - 9
Needle interference left/right adjustment.
....4 - 10
Cassette threading height adjustment
..4 - 11
Shuttle return timing adjustment.....4 - 12
Upper thread tension adjustment ...4 - 13
Feed adjustment.............................4 - 14
Presser bar height and parallel adjustment
..4 - 15
Clearance between the needle and the rotary
hook point adjustmen
...........................4 - 16
Inner rotary hook (bobbin thread)
tension adjustment .........................4 - 17
Bobbin winder (uneven bobbin winding and
bobbin winding amounts) adjustment
.........4 - 18
Module adjustments
Front/back, left/right position of feed dog adjustment
..4 - 19
Feed dog height adjustment ...........4 - 20
Inner rotary hook bracket position adjustment
..4 - 21
Forward and back adjustment of needle and presser.
.4 - 22
Adjust the needle thread block .......4 - 23
BH lever switch position adjustment
.....4 - 24
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