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a)
In
Case
the dinension is too snall:
fhe
Iqain
Drum
cear
becomes engaged
lJith the
Rack
too
nruch
rvhich
results in the
Carriage
becoming
too
heavy during
operation.
The
position of the
Drum
Unit
becomes
more
forrrald
than
the
standard
position
so thaE
the selected
needles,
when
moved
back,
wjlt coltide with the
Separation
Cam.
b)
Sub Drun
Latch
Needle
Fig.79
Correcting
Methods:
When
the
dimension
is smaller or larger
than
Rack
the
standald
rneasure-
ment:
Bend
the
Needle
Bed Rack backwards
or
with the
Rack
Adjusting
Too1,
as
shown
eveness
of
the
Rack
after
adjustment.
forwards, as the
case
may be,
in Fig.
80,
below,
Check the
Needle
Bed
Fig.
80
Mai
n
Dmn
Adjustment
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