COMPUTER-CONTROLLED HIGH SPEED LOCKSTITCH BAR TACKING MACHINE
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MAINTENANCE
1. Adjusting the height of the needle bar
Turn OFF the power before starting the work so as to prevent
accidents cause by abrupt start of the sewing machine.
F type only
Bring needle bar
to the lowest position of its stroke. Loosen needle bar connection
screw
and adjust so that upper marker line engraved on the needle bar aligns with the
bottom end of needle bar bushing, lower
. For F type only, adjust the needle bar to the
position where it is lowered by 0.8 mm to 1 mm from the center of upper marker line
engraved on the needle bar.
After the adjustment, make sure that there is no uneven torque. When stitch
skipping occurs in accordance with the sewing conditions, adjust the height of the
needle bar so as to lower it by 0.5 to 1 mm from the needle bar engraved line .
2. Adjusting the needle-to-shuttle relation
Turn OFF the power before starting the work so as to prevent
accidents cause by abrupt start of the sewing machine.
.
Turn the hand wheel by hand. When
needle bar has gone up, adjust so that
lower marker line engraved on the needle
bar aligns with the bottom end of the needle
bar bushing , lower.