SC201(1900A/1903A) Operation Instruction
19
2.4.6 Thread Clamp Device
Trouble of sewing (slip-off of needle thread, stitch skippig, or stain of needle thread) at the time of
high speed start can be prevented with the thread clamp device. The thread clamp device works in
the state that the thread clamp indication LED lights up and does not work when the LED goes off.
Changeover of ON/OFF motion is performed with key. When the thread clamp device is
OFF, the start automatically becomes the slow start.
Caution: When memeory switch No.35 is “1”(prohibited), the thread clamp does not work.
In addition, key is ineffective.
*Masters that demand special attention when using the needle thread clamp device
(1) In case of with the needle thread clamp (motion), make shorter the length of needle thread
remaining on the needle at the sewing start for use. When the length of needle thread is
lengthened, needle thread on the wrong side of material is apt to protrude. In addition, when
the length is excessively lengthened, the end of needle thread held by the needle thread clamp
may be rolled in the seams.
（2）It is possible to adjust needle thread shorter by making the needle thread clamp work while
holding the stabilized sewing at the start of sewing and the gathering (bird’s nest) of needle
thread on the wrong side of material can be lessened. However, for the pattern which the
stitch for neatly rolling in needle thread is short, needle thread may protrude from the wrong
side of material. Select with/without thread clamp referring to the item below.
1. In case of with the needle thread clamp, the
standard of the length is 33 – 36mm.
2. When needle threadlong after replacing thread
or the like or sewing while holding needle
thread by hand, Turn OFF the THREAD
CLAMP key.
3. When the needle thread held with the thread
clamp is rolled in the seams, do not draw the
material forcibly and cut the connecting needle
thread with the scissors or the like. The seams
are not damaged since it is the needle thread at
the sewing start.
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