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(15) Adjustment of needle thread path
Adjustment of needle thread path
The needle thread adjusting thread path
is no sag of the needle thread that passes through the lever thread path
thread path
when the needle bar is positioned at the upper dead point.
1) Height of needle thread adjusting path
The standard dimension is 27mm from the hole bottom "A" of the needle thread guide
bottom "B" of the needle thread adjusting thread path
When tightening the needle thread in particular, the dimension shall be 36mm from the hole bottom "C"
of the needle thread guide
2) Height of rocking take-up path
The standard dimension is 15mm from the hole bottom "E" of the rocking thread take-up lever thread
path
to the center "F" of the setscrew
3) Height of needle thread guide adjuster
When the needle bar stays at the lower dead point, the standard dimension is 1.6mm from the upper
end "G" of the lever thread path
Standard dimension
Needle bar at the
upper dead point
Standard Adjustment
to the hole bottom "D" of the needle thread adjusting thread path
to the upper end "H" of the needle thread holding adjuster
Standard dimension
E
15mm
F
Rocking thread take-up lever
is installed just under the needle thread guide
.
.
A
27mm
B
– 38 –
from the needle thread adjusting
Standard dimension for tightening
the needle thread
C
36mm
D
Needle bar at the lower dead point
H
1.6mm
1.6mm
1.6mm
1.6mm
1.6mm
G
so that there
to the hole
.
.
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