D.
Subclass
Information
The standard
Pfoff
3334
has been adapted to produce a vastly diversified
range of tack designs differing both in shape
and
in the number of stitches
per tack. There is a special subclass
machine
available for any tack design
desired.
The various subclass machines differ in the design of the feed cam, the
knife com, the clamp feet, and the feed plate. In oddition, each subclass
machine
usesa different gear ratio inthe
worm
gear assembly.
All requests of our customers for the development of additional subclasses
capoble of performing special non-standard operations will be given our
careful
consideration.
Instructions for converting one subclass into another are given on page 69.
Listed in the following Tables
are:
1. Subclasses having the same
gear
ratio
2. Subclasses having the
same
knife cam
3. Subclasses requiring additional parts
(marked with an asterisk in Tables 1.
and
2.)
4. Principal parts varying from one subclass to another
5. Special
organizational
ports
6. Tack designs
arranged
by shapes. This table offers a survey of the variations
available
for
each
basic
tcck
design,
and
indicates
the
total
number
of
stitches
and
the
dimensions
of
each
tack.
Conversion of
one
subclass machine into
another
takes very little time if both
machines
have
the
same
gear
ratio. If both machines have the
same
knife
cam
and
require no
additional
conversion parts, all
that
has to be
exchanged
is the
feed
cam, work clomp feet,
and
feed plate.
Conversion
of
one
subclass
machine
into
another
takes
more
time
if
both
mochines
have
different
gear
rotios
because
in this
case
both the worm
and
worm wheel have to be exchanged. (It is best to hove your
nearest
Pfaff
representative perform this conversion job for you.).
If the machine is to be fitted to moke a different size bartock (within the
dimensions given in the tack design diagrams), a matching feed
plate
and
work clomp feet
have
to be fobricated.
91
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