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29. ADJUSTING THE AUTOMATIC PRESSER FOOT LIFTER
31. CAUTIONS WITH REGARD TO THE SEWING OPERATION
30. Needle thread clamp device (option)
1) Loosen adjustment nut
❶
, turn cylinder rod
❷
and adjust so that the lifting amount of the press-
er foot is 16 mm when the cylinder is fully com-
pressed.
Turn the rod in the direction of
A
to increase the
lifting amount, or turn it in the direction of
B
to
decrease the lifting amount.
2) After the adjustment, tighten adjustment nut
❶
.
1) Be sure to perform the sewing operation after confirming that the needle bar position (needle UP stop po
-
sition/needle DOWN stop position) when the sewing machine stops is properly positioned. (For the setting
of the designation of needle bar position, refer to
"32. ADJUSTING AND CHECKING THE STOP POSI-
2) Perform a trial sewing and confirm the finished state of sewing since the state at the start of sewing is
different from that at the end of sewing in accordance with the sewn product (material and thread).
3) Be sure to perform the thread trimming motion on the cloth.
(1) Setting the functions of SC-922 control box
For how to set the functions of SC-922 control box, refer to the Instruction Manual or Service Manual of
SC-922.
1) Make sure that "1" (stitch) is set for the soft start function (Function No. 1).
2) Make sure that "170" (sti/min) is set for the number of soft start (Function No. 37).
3) Set "2" (compulsory valid) for the upper thread clamp function (Function No. 156).
* The aforementioned settings 1) and 2) are required for operating the needle thread clamp device normally.
❶
❷
A
B
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
