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23
VT2500
②
Turn off the power switch of the motor and check the
motor has stopped before making adjustment.
052
053
6.
Machine adjustment
CAUTION
6.1 Needle thread tension adjustment
Needle thread eyelet(front) adjustment
The tension of the needle threads can be adjusted
with the needle thread eyelet(front) ① . In the
standard position, the distance between the top
surface of the arm ⑪ and the top surface of the
needle thread eyelet(front) ① is 40 mm.
Loosen the screws ② to adjust the needle thread
eyelet(front) ① . Once the eyelet has been
positioned, tighten the screws ②.
● To loosen the needle thread, lower the needle
thread eyelet(front).
● To tighten the needle thread, raise the needle
thread eyelet(front).
Needle thread strike-off pin adjustment
The size of the needle thread loops can be
adjusted with the needle thread strike-off pins
③ ④ ⑤. While the needle thread strike-off pins
③ ④ ⑤ are in the standard positions, the top
of the needle bar thread eyelet ⑥ becomes flush
with the bottom of the recess of the pins when
the needle bar reaches the lowermost position. (See
Fig. 053.)
Loosen the screws ⑦ to adjust the needle thread
strike-off pins ③ ④ ⑤. Once the pins have been
positioned, tighten the screws ⑦.
● To make loop smaller, lower the needle thread
strike-off pin.
● To make loop larger, raise the needle thread
strike-off pin.
Holder adjustment
After changing the type of thread, the position
of the holder ⑧ needs to be moved and the size
of the loops of the all needle threads needs to
be adjusted.
Loosen the screws ⑨ ⑩ to adjust the holder⑧ .
Once the holder has been positioned, tighten the
screws ⑨ ⑩.
● To make loop smaller, lower the holder.
● To make loop larger, raise the holder.
To tighten
To loosen
40mm
①
⑪
②
To make loop larger
To make loop samller
⑥
⑩
⑦
⑨
⑧
③ ④ ⑤
0mm