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Adjustment Procedure
2) Adjusting the remaining length of needle thread
Adjust the length of needle thread remaining at the needle by turning thread tension No. 1 nut
❷
.
Turn thread tension No. 1 nut
❷
clockwise (in direction
A
), to shorten the thread length remaining on the
needle after thread trimming or counterclockwise (in direction
B
), to lengthen the thread length.
3) Length of needle thread remaining at the needle
The needle thread length C dimensions of the S type and H type is 35 to 45mm.
* So-called "bird's nest phenomenon" is reduced by shortening the length of needle thread remain-
ing at the needle. In this case, however, the needle thread is likely to slip off the needle eyelet. To
reduce slip-off of the needle thread, sewing speed at the beginning of sewing should be reduced.
