– 66 –
6. After the adjustment above has been per-
formed, when the sewing machine stops at the
DOWN position, top end
C
of the looper is lo-
cated at the position where it has scooped loop
D
of left needle thread as shown in the figure.
(Caution) 1. When using the synchronizer as
UP/ DOWN stop position type
without using the thread trim-
mer device, change the setting
of the function setting No. 74 to
"1 (thread trimming )
→
0 (UP/
DOWN position)". Thread trimmer
safety device error occurs unless
the setting is changed, and it is
impossible to operate the sewing
machine. So, be careful.
2. Refer to the Instruction Manual
of SC-921 "III-6. SC-921 Function
setting".
7. If the thread is detached from the spreader
when the presser is moved up and down after
the sewing machine is stopped, decrease the
setup value of function setting No. 122.
(Caution) If the setup value is too small, this can
be a cause of stitch skipping.
C
D
