ZOJE 5780BK, Руководство по эксплуатации

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V
．
MAINTENANCE
1. Adjusting the needle-to-hook relation
★
WARNING
：
T
o protect against possible personal injury due to abrupt start of the machine, be
sure to start the following work after turning the power off and ascertaining that the motor is at rest.
Adjust the needle-to-hook relation when
the needle enters the center of the needle
hole in the throat plate
（
1
）
Needle bar height
Bring down the needle bar to the lowest point.
Insert the part [1] of timing gauge into the gap
between the bottom end of needle bar and throat
plate, where the bottom end of the needle bar
touches the top of the part [1] of the timing gauge.
Loosen needle bar connection screw , and
adjust the height of the needle bar.
（ 2 ） Set the needle to hook relation in
the following way:
Rotate the hand pulley in the correct direction
until the needle starts to go up from its lowest
point.
Inset the part [2] of the timing gauge into the gap
between the bottom end of the needle bar and the
throat plate, where the bottom end of the needle
bar touches the top of the part [2] of the timing
gauge.
Loosen setscrew of the hook sleeve, and align
blade point of the sewing hook with the center of
needle hole. Make adjustment so that a clearance
of approx. 0.05mm is provided between the needle
and the blade point of the hook.
(3)Adjusting the bobbin case positioning
stopper
Adjust with setscrew so that the contact of the
top end of bobbin case positioning stopper and
the end of inner hook is 0 to 0.2mm.
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