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5-8. Thread clamp device
Trouble of sewing (slip-off of needle thread, stitch skipping, 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
THREAD CLAMP key
. When the thread clamp device is OFF, the start auto-
matically becomes the slow start.
1. When memory switch No. 35 is "1" (prohibited), the thread clamp does not work. In addition,
THREAD CLAMP key is ineffective.
2. Memory switch, refer to "I.8. HOW TO USE THE MEMORY SWITCH" p.51.
* Matters 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.
1) In case of with the needle thread clamp, the stan-
dard of the length of needle thread is 33 to 36
mm.
2)
When needle thread is long 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.
(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 length 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) When the sewing length is short (less than ap-
proximately 10 mm), the end of needle thread
may protrude like beard even when adjusting
needle thread shorter.
1)
3)
33 to 36mm
10mm
(Right side)
(Wrong side)
Needle thread
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