JUKI LH-4500C Series Instruction Manual page 120

❸ ❹
<Thread clamp setting screen>
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 beginning of
sewing should be reduced.
[Memory switch]
• U286 Thread clamp sewing speed: Decrease (the factory-set value: 250 sti/min)
• U293 Thread clamp sewing speed reset angle: Retard (the factory-set value: 460 °
No.
U286 Thread clamp sewing speed:
This memory switch is used to set the sewing speed when operating
the thread clamp.
U293 Thread clamp sewing speed reset angle:
This memory switch is used to set the angle at which the thread clamp
sewing speed is reset.
* This set angle is in effect when the thread clamp operates.
❺
B A
②
Item
– 115 –
3) Press
❹ will be placed in ON.)
(
4) Press
The "sewing data edit screen" is dis-
played.
[Adjusting the remaining length of needle
thread]
Adjust the length of thread remaining at the nee-
dle by turning thread tension control nut No. ② .
Turn thread tension No. 1 nut ② clockwise
1)
(in direction A), to shorten the thread length
remaining on the needle after thread trim-
ming or counterclockwise (in direction B), to
lengthen the thread length.
❸ or ❹ .
❺ to confirm the setting.
Setting range Unit
100 to 3000 sti/min
0 to 720 Degree