−4 −
Standard Adjustment
(3) Needle rocking timing
The engraved marker line on the needle rocking drive large gear is aligned with the center of the hook
driving shaft when the needle bar has reached its highest point (needle should complete rocking when the
needle comes down and passes the throat plate).
(4) Height of the needle bar rocking rod (adjusting the reference of needle bar rocking
components)
Needle bar rocking cam is located on the stitch base line side and the needle enters in the center of the hole
in the throat plate when the clearance provided between the lower end of the needle bar rocking rod and the
machine bed is 8 mm.
Needle rocking
drive large gear
Needle bar rocking cam
Engraved
marker line
Hook driving
shaft
Needle rocking
drive pinion
Setscrew No. 1
Engraved
marker line
Top surface of machine bed
(Figure observed from the front side of the sewing machine)
Needle entry
8 mm
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