typical GT1790A, Инструкция

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5. Thread tension
(1) Thread take-up spring ((purl stitch)
1) The thread take-up amount of thread take-up
spring
①
is 8 to 10mm, and the appropriate
pressure at the start is approximately 0.06 to
0.1N.
2) To change the stroke of the thread take-up spring,
loosen screw
②
, insert a thin screwdriver into the
slot of thread tension post
③
, and turn it.
3) To change the pressure of the thread take-up
spring, insert a thin screwdriver into the slot of
thread tension post
③
while screw
②
is tightened,
and turn it. Turning it clockwise will increase the
pressure of the thread take-up spring. Turning it
counterclockwise will decrease the pressure.
(2) Adjusting the thread take-up amount of the thread
take-up lever
The thread take-up amount of the thread take-up lever
should be adjusted in accordance with the thickness of
the sewing products.
a. For heavy-weight materials, loosen setscrew
②
in
thread guide
①
, and move the thread guide to the
left.
b. For light-weight materials, move thread guide
①
to the right. The thread take-up amount of the
thread take-up lever will be reduced.