Adjustment of the Upper Thread Length a
fter Trimming(Fig. 31)
23
At the time of thread trimming,the thread te
-nsion is loosened and tension is applied by t
-he thread clamp
①
only.If added the tension
in the thread clamp
①
, the upper thread lengt
-h that left in the pinhole will be shorter, and v
-ice versa.
1.The length of upper thread which left in th
-e pinhole will decrease when turning the adju
-sting nut
②
in the thread clamp
①
towards th
-e clockwise (A), otherwise it will increase wh
-en turn toward anti-clockwise (B). (The stan
-dard length of the upper thread which left in t
-he pinhole is 25~30mm)
-20-
Fig.32
24
Adjusting the Take-up Amount of Take-up Lever(Fig. 32)
C
①
②
A
B
1.Unscrewing the screw
①
.
2
.Move the right thread hook
②
to adjust : the thread amount of thread take-up lever will incr
-ease if turned it towards left (A direction), while turning it to the right (direction B) and the thre
-ad amount of thread take-up lever will decrease accordingly.(The standard position is obtaine
-d when graduation line C on right thread hook is aligned to screw center.)
3.Remember to tight the screw
①
after adjusting.
Caution:
1.To prevent the unexpected startup of sewing machine, trim off the power supply b
-efore the operation is conducted.
2.For heavy duty , move the right thread hook
to left to add amount of thread.
②
3.For light material , move the right thread hook
to right to reduce amount of the t
②
-hread.
Fig.31
②
A
①
B
ZOJE Europe 2022
