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Adjustment procedures
Results of Improper adjustment
1. DOWN position
(1) DOWN position of the needle is the position where top end
B
of the looper has scooped loop
A
of the left needle thread.
If it is incorrect, adjust the down position of the needle by func-
tion setting No.122 (DOWN position starting angle compensa-
tion) of SC-921.
* When performing the machine type setting, it is set to be
stopped at a position described above.
2. UP position
(1) UP position of the needle is the position that the mark
C
on
the machine head side aligns with the mark
D
(marker line of
upper side) on the handwheel
❶
.
If it is incorrect, adjust the down position of the needle by func-
tion setting No.121 (UP position starting angle compensation)
of SC-921.
* When performing the machine type setting, it is set to be
stopped at a position described above.
