Upper And Lower Loopers; Needle And Needle Guard; Chain Looper And Needle - Singer 321C Instruction Manual And Parts List

3.9.4
Upper and
Lower Loopers
3.9.5
Needle and
Needle Guard
3.9.6
Chain Looper
and Needle
When the upper and lower loopers
are crossed, the distance is 0.2 mm
for 'A' and 0.5 mm for 'B', accord-
ing figure 20.
When the looper point is on the
side opposite to the center line of
the needle (left needle if there are
two needles), space between nee-
dle and rear needle guard of 'A' is
0 mm. When needle moves to the
lowest position, space between
needle and front needle guard of
'B' is from 0.15 to 0.20 mm, accord-
ing to figure 21.
The safety looper should be fixed in
a position lower than this support.
And when it moves to the left far
end, the distance between the loop-
er point and the center line of needle
is 2.5 mm, according to figure 22.
High Speed Overlock Machine
Figure 20
Figure 21
Figure 22
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