Attachment of F pulse motor ...........................................................................................................3 - 75
Alignment of F gear teeth ................................................................................................................3 - 77
Attachment of Spring .......................................................................................................................3 - 77
Attachment of Feed dog ...................................................................................................................3 - 78
Needle-presser module ...................................................................................3 - 80
Attachment of Shaft bushing ...........................................................................................................3 - 81
Attachment of Lock nut ...................................................................................................................3 - 81
Attachment of Z pulse motor ...........................................................................................................3 - 81
Attachment of Rubber ......................................................................................................................3 - 82
Attachment of Z zigzag cam ............................................................................................................3 - 82
Attachment of Presser bar ................................................................................................................3 - 84
Attachment of PF switch assy ..........................................................................................................3 - 85
Attachment of Shaft assy .................................................................................................................3 - 88
Attachment of BH switch assy .........................................................................................................3 - 91
4. Adjustment ..........................................................................................4 - 1
Starting test mode/Starting and stopping operation ...........................................4 - 2
Timing belt tension .............................................................................................4 - 4
Motor belt tension ..............................................................................................4 - 5
Upper thread tension .........................................................................................4 - 6
Left base line needle drop .................................................................................4 - 7
Needle bar rising ..............................................................................................4 - 10
Needle bar height ............................................................................................4 - 11
Clearance between needle and rotary hook point ...........................................4 - 12
Needle threader ...............................................................................................4 - 13
Presser bar height and parallelism ..................................................................4 - 14
Feed forward/backward ...................................................................................4 - 15
Bobbin winder ..................................................................................................4 - 16
v