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3) UPPER THREAD TENSION ADJUSTMENT
4) NEEDLE HEIGHT SETTING
(1) Thread take-up lever thread guide hole standard position
Set the distance between the thread take-up holder base
and the thread guide hole of the thread take-up lever to 4.4mm. (Refer
to the Figure 48)
Loosen the thread take-up lever fixation screw
and adjust the the thread take-up lever .
The tighten the thread take-up lever fixation screw
and set it in order.
(2) Upper thread take-up lever timing adjustment
When the upper thread is seized by the upper thread holder, set the upper thread to 0~1mm position from the highest point of the
thread take-up lever, which is point A in the Figure 46.
Loosen the upper thread take-up lever clamp screw
and tighten the clamp screw.
When the needle bar is at the highest point, the height of the 4th end of the needle on the left is set as followings like Figure 47.
M5 (5.2mm type) = 13.49mm
M6 (6mm type) = 12.7mm
Lift the needle bar
to the highest point.
Remove the rubber cap
and loosen the needle bar clamp screw .
