Singer 321C - Chain Looper and Needle; Needle and Needle Guard; Upper and Lower Loopers

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High Speed Overlock Machine | Instructions Manual and Parts List
3.9.4
Upper and
Lower Loopers
Whentheupperandlowerloopers
arecrossed,thedistanceis0.2mm
for‘A’ and0.5mmfor‘B’, accord-
inggure20.
Figure 20
3.9.5
Needle and
Needle Guard
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gure21.
Figure 21
3.9.6
Chain Looper
and Needle
Thesafetyloopershouldbexed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gure22.
Figure 22