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No.
U286
Thread-clamp sewing speed
Sewing speed to be employed in the case of operating the thread clamp is set.
U293
Thread-clamp sewing speed cancelling angle
The degree of an angle of the main shaft at which the sewing speed employed
when the thread clamp operates is cancelled is set.
* This setting is enabled in the case the thread clamp operates.
[Condensation stitching at the beginning of sewing]
In the case the thread clamp is enabled and the reverse feed stitching at the beginning of sewing is not car-
ried out, condensation stitching is carried out at the beginning of sewing (the number of stitches (factory-set
at the time of shipment): 2).
A
B
B
A
②
Item
A: Condensation stitching (stitch length: 2.0 mm)
B: Normal stitch length
[Adjusting the remaining length of needle thread]
Adjust the length of thread remaining at the needle
by turning thread tension control nut No. ② .
1) Turn thread tension No. 1 nut ② clockwise (in di-
rection A), to shorten the thread length remaining
on the needle after thread trimming or counter-
clockwise (in direction B), to lengthen the thread
length.
So-called "bird's nest phenomenon" is
reduced by shortening the length of needle
thread remaining 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 be-
ginning of sewing should be reduced.
[Memory switch]
• U286 Thread-clamp sewing speed : Re-
duce (Factory-adjusted to 250 sti/min at
the time of shipment)
• U293 Thread-clamp sewing speed cancel-
ling angle : Retard (Factory-adjusted to
460 degrees at the time of shipment)
– 101 –
Setting range
Unit
100 to 3000
sti/min
0 to 720
Degree
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