4 - 1
4
Adjustment
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
Rotary hook unit position ........................ 4 - 8
Needle clearance left/right ...................... 4 - 9
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
BH lever switch position........................ 4 - 17
Needle and presser foot front/back position
.... 4 - 18
Front/back and left/right position of feed dog
... 4 - 19
Feed dog height.................................... 4 - 20
Inner rotary hook bracket position......... 4 - 21
Inner rotary hook assy. (lower thread) tension
.... 4 - 22
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