4
4 - 1
Preparation Removal of covers ...............................4 - 2
Inspection
Needle point damage
...............................4 - 4
Adjustment Timing belt tension ...............................4 - 5
Motor belt tension.................................4 - 6
Needle bar supporter stopper L position
....4 - 8
Needle bar supporter stopper R position
....4 - 9
Needle swing timing ...........................4 - 10
Three point needle drop .....................4 - 13
Left and right needle clearance..........4 - 14
Right needle drop position (zigzag stitch)
....4 - 15
Needle drop position to presser foot hole (front/back)
.4 - 17
Inner rotary hook plate position..........4 - 18
Needle bar rising ................................4 - 19
Needle bar height...............................4 - 21
Needle clearance ...............................4 - 22
Left straight stitch needle drop and
zigzag stitch maximum left needle drop position
...4 - 23
Feed dog position (front/back and left/right)
....4 - 25
Feed dog height .................................4 - 26
Presser bar height..............................4 - 27
Upper thread tension..........................4 - 28
SS pattern (triple stretch stitch) stitch length
....4 - 29
Feed distance.....................................4 - 30
Straight forward/Straight reverse stitch length
..4 - 32
BH lever switch load...........................4 - 34
Left reverse stitch of buttonhole stitch length
...4 - 35
BH stitch bar tack feed distance.........4 - 37
BH sewing length ...............................4 - 39
Bobbin winder ....................................4 - 41
Needle threader .................................4 - 42
Lower thread tension..........................4 - 44
Adjustment
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