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VT2500
6. Machine adjustment
065
When using 3-needle
When using 2-needle
0.2mm - 0.3mm
0.2mm - 0.3mm
⑦
⑦
064
①
6.3(6.2 - 6.4)mm
062
③
②
⑤
④
①
063
①
L
Table 6
Needle distance (code)
Looper and needle
distance (L)
3.2 ㎜(32)
4.7(4.6 - 4.8)㎜
4.0 ㎜(40)
4.3(4.2 - 4.4)㎜
4.8 ㎜(48)
3.9(3.8 - 4.0)㎜
5.6 ㎜(56)
3.5(3.4 - 3.6)㎜
6.4 ㎜(64)
3.1(3.0 - 3.2)㎜
⑥
6.5 Needle and looper adjustment
6.5.1 Looper and needle distance
The distance (L) from the tip of the looper ① to the
center of the right needle when the needle is at the
lowest point and the looper ① is at the extreme right
varies depending on needle distance. Adjust the distance
as shown in Table 6.
Loosen the screw ③ on the looper holder ② and the screw
⑤ on the looper holder collar ④ to adjust the position
of the lopper ①.
Once the looper has been positioned, tighten the screws ③
and ⑤.
SUPPLEMENT
Even though the needle distance is different, the
distance from the center of the needle bar to the tip of
the looper ① is 6.3 mm(6.2 - 6.4 mm.) (See Fig. 064.)
6.5.2 Looper angle and height
Insert the looper ① to the end of the looper
holder ② and tighten the screw ⑥. Looper height
and looper installation angle (2°) will be fixed.
6.5.3 Looper front-and-rear position
(1) Turn the machine pulley until the tip of the looper ①
comes to the center of the left needle ⑦.
(2) Loosen the screws ③ ⑤ to adjust the looper holder ②
together with the looper holder collar ④ so that the
clearance between the backside of the left needle ⑦
and the tip of the looper ① is 0.2 - 0.3 mm.
(3) Tighten the screws ③ ⑤.
SUPPLEMENT
Even though the set of the looper ① and the looper
holder ② is removed, they can be reinstalled easily.
Fit the pin of the looper holder collar ④ into the hole
of the looper holder ② , press the parts together and
tighten the screw ③ on the looper holder ② . Then,
check the clearance between the needle and the looper ①.
CAUTION
● Make the looper holder ② touch the looper holder
collar ④ securely. If not, parts around the looper
holder may be damaged.
● When tightening the screw ③ , the looper ① may
move in the front-and-rear position. After tightening
the screw ③, recheck the front-and-rear position of
the looper ①.